- C
- C
- A
- D
- D
- C
- D
- E
- A
- B
- E
- A
- D
- E
- D
Friday, October 10, 2014
Sunday, October 5, 2014
SAT notes October 4, 2014
- 2.40
- 2.3
- 8100
- 202
- 20
- 0.0625-0.03125==0.03125
- 1:8
- A
- C
- B
- D
- A
- B
- A
- B
- B
- D
- A
- A
- C
- D
- D
- E
- C
- C
- A
Friday, October 3, 2014
Thursday, October 2, 2014
SAT notes October 2, 2014
- B
- A
- E
- D
- A
- B
- D
- E
- C
- B
- A
- D
- E
- E
- B
- C
- E
- C
- C
- D
- E
- E
- C
- E
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- E
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- B
- D
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- E
- C
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- B
Wednesday, October 1, 2014
Friday, September 26, 2014
Monday, September 22, 2014
SAT notes September 22,2014
Television has defiantly brought people closer together. The television forum has been used to spark conversations all across the globe. No longer do you just talk about last nights episode with your friend down the street but you talk about them across the world through social media and T.V. show forums. Television doesn't only bring the people of a community together but the people of the world together. The best example of this are superhero T.V. shows. In the 1950's through the 1970's watching superhero shows was lame or considered nerd. In today's society it is admired if not praised. The people of this generation are caught in "Superhero Mania". Superhero memorabilia is worth millions of dollars and the industry itself is worth billions. Television is also bring people closer because there are so many shows on so many different forums that on can enjoy. This can let one enjoy their own shows without fighting with family members to see it. Also with the advancements of DVR and On Demand television this lets one watch shows whenever you want. Movie nights with your friend is no longer at a specific time but it can be whenever you want.You can record a show or movie or just look it up on Hulu, Netflix or anywhere else on the internet. In conclusion television has brought people closer together because it has sparked conversations between strangers that have never been done before.
A
D
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C
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E
A
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D
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D
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D
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/A
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/A
SAT notes Spetember 15,2014
- The SAT is a standardized exam that most high school students take before applying to college
- The SAT tests you in three areas: reading,writing, and mathematical reasoning
- The SAT is a 4 hour plus exam divided into ten sections
- You will be in the testing room for 4 1/2 to 5 hours
- C unpredictable
SAT notes September 21, 2014
- B
- E
- C
- three types of questions on the writing skills test
- improving sentences
- identifying sentence errors
- improving paragraphs
- writing skills section will contain 49 questions
- C
- D
- B
- C
- for wrong answers you lose 1/4 point questions you leave out have no effect on your score
- the best way to increase your score on the SAT is to answer fewer questions
- go quickly but carefully through the easy questions
- dont read the directions or look at the sample questions
- concentrate on questions that don't take you tons of time to answer
- answer the easy questions first the work on the hard ones
- math questions always have one correct answer and critical reading questions are more subjective
- fill in the answers on your answer sheet in blocks
- base your answers only on the information provided never on what you think you already know
- dont change answers capriciously
Sunday, September 21, 2014
SAT notes September 21, 2014 part 3
when you can eliminate 1 or 2 answers you must guess
D
D
A
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SAT notes Sptember 21,2014
C
E
Substitute each of the answer choices in the original sentence and see which word or phrase makes the most sense.
E
two types of math questions on the SAT multiple choice and grid ins
54 math questions divided into 3 sections
25 minute section with 20 multiple choice questions
a 25 minute section with 8 multiple choice questions followed by 10 student produced response questions
a 20 minute section with 16 multiple choice questions
the questions are in order of increasing difficulty
on the SAT all but 10 of the questions are multiple choice questions
C
Ignore the fact that it is a multiple choice question don't even look at the choices
E
Substitute each of the answer choices in the original sentence and see which word or phrase makes the most sense.
E
two types of math questions on the SAT multiple choice and grid ins
54 math questions divided into 3 sections
25 minute section with 20 multiple choice questions
a 25 minute section with 8 multiple choice questions followed by 10 student produced response questions
a 20 minute section with 16 multiple choice questions
the questions are in order of increasing difficulty
on the SAT all but 10 of the questions are multiple choice questions
C
Ignore the fact that it is a multiple choice question don't even look at the choices
Friday, September 5, 2014
SAT notes September 4, 2014 part 2
- they day before the SAT dont do practice tests
- Do look over all the tactics listed below so they will be fresh in your mind
- Set out your test kit the night before
- first answer all the easy questions
- change answers only if you have a reason to do so
- in double blank sentences test one blank at a time not two
- read all answer choices before you decide which is best
- a word may have more than one meaning
- before you look at the choices think of a word that makes sense
- read as rapidly as you can with understanding
- as you read opening sentences try to predict what the passage is about
- base your answer only on what is written in the passage
- try to answer all the questions on a particular passage
- whenever you know how to answer a question directly do it
- no lengthy arithmetic
- the answer to a grid in question can never be negative
- you can never grid in a mixed number
- when girding a decimal point never put a 0 in front
- there is no penalty for wrong answers on grid ins
Thursday, September 4, 2014
SAT notes September 9, 2014
- SAT helps colleges get to know you better by giving insight into how you think, solve problems and communicate
- many high school students take the SAT twice
- The SAT is a program of the College Board
- The SAT test development committees, made up of college professors and high school techers who are experts in their field
Monday, August 18, 2014
Thoughtful Thursday
Michelle Masangkay
Comp Graphic Arts
Period 3
10/24/13
3 things this logo can improve on is how the font is arched; give more images to know what you are selling in your fast food place on your logo, and you should pick a different color than blue, maybe red, because the color of blue doesn't make me think its a bbq place. Also make the name of your place stand out, I'm only focused on the palm tree inside the circle. The colors overall don't go together. The yellowness of the palm tree is the only thing that stands out. Part of the neon gras also stands out. Nice font though.
Comp Graphic Arts
Period 3
10/24/13
3 things this logo can improve on is how the font is arched; give more images to know what you are selling in your fast food place on your logo, and you should pick a different color than blue, maybe red, because the color of blue doesn't make me think its a bbq place. Also make the name of your place stand out, I'm only focused on the palm tree inside the circle. The colors overall don't go together. The yellowness of the palm tree is the only thing that stands out. Part of the neon gras also stands out. Nice font though.
Monday, August 11, 2014
Acid-Base Practice Quiz
If HCl and H2O react together in an acid-base reaction to form their Bronsted Lowry Conjugates, the products would be Cl- and H3O+
Chemistry Test
1. D
2 E(d)
3. e
4 A(B)
5 A
6 B
7 E(C)
8 B
9 A
10 C
11 A
12 A
13 A
14 D
15 C (E)
16 E(D)
2 E(d)
3. e
4 A(B)
5 A
6 B
7 E(C)
8 B
9 A
10 C
11 A
12 A
13 A
14 D
15 C (E)
16 E(D)
Balancing Equations
Law of conservation of mass
matter can be neither created nor destroyed
In a chemical reaction the amount of reactants equal the amount of products
The number of atoms of each type of element must be the same on each side
mole = 6.022 x10^23 molecules
liters to moles
1 mole = 22.4L
matter can be neither created nor destroyed
In a chemical reaction the amount of reactants equal the amount of products
The number of atoms of each type of element must be the same on each side
mole = 6.022 x10^23 molecules
liters to moles
1 mole = 22.4L
Chemistry Test
1. A
2.D
3. D (C)
4. C (D)
5 A (D)
6. A
7. D (c)
8. d
9 B(C)
10 B (c)
11 B
12 D (b)
13 A (d)
14 e
15A(d)
16 A
2.D
3. D (C)
4. C (D)
5 A (D)
6. A
7. D (c)
8. d
9 B(C)
10 B (c)
11 B
12 D (b)
13 A (d)
14 e
15A(d)
16 A
Wednesday, July 16, 2014
chemistry notes
17.1
What is a collision model? A collision model explains many characteristics of chemical reactions
17.2
What is activation energy?
A minimum energy needed for a reaction to occur
What are enzymes?
Catalysts inside living organisms
17.3
What are homogeneous reactions?
Reactions involving only one phase
What are heterogeneous reactions ?
Reactions involving 2 phases
pg 570 2-6
2. For the reaction N2(g) + 3H2 = 2NH3 list the types of bonds that must be broken and the type of bond that must form for the chemical reaction to take place ?
Hydrogen Bonds must be broken while London Dispersion bonds form.
3. How do chemists envision reactions taking place in terms of the collision model for reactions? Give an example of a simple reaction and how you might envision the reaction taking place.
Reactions take place when atoms collide. When one atom hits another a reaction occurs
4. What does the activation energy for a reaction represent? How is the activation energy related to whether a collision between the molecules is successful?
The activation energy represents the minimum energy required for a reaction to occur. If there is not enough energy a reaction won't occur
5. What is a catalyst? How does a catalyst speed up a reaction?
A catalyst is a substance that speeds up a reaction. It speeds up a reaction by lowering the activation energy.
6. What are catalyst in living cells called? Why are the biological catalysts necessary?
Catalysts in living cells are called enzymes. They are necessary because they use less heat for reactions
17.4
What is equilibrium?
Equillibrium is the exact balancing of two process, one of which is the opposite of the other
What is chemical equilibrium?
Chemical equilibrium is a dynamic state where the concentrations of all reactants and products remain constant
17.5
Is equilibrium static?
No it is highly dynamic
17.6
What is the law of chemical equilibrium?
A general description of the equilibrium condition
What is equilibrium expression
K= CD/AB
What is equilibrium constant?
Concentrations of the chemical species at equillibrium
The Crucible Reading Schedule
Assigned Pages/ HW # pgs. Due Date
pgs 3-8 5 pgs. Tues, 12/3
pgs 8-20 12 pgs Thur, 12/5
pgs. 20-32 12 pgs Fri 12/6
pgs 33-48 15 pgs Mon 12/9
Act 1 notes
pgs 49-65 16 pgs Tues 12/10
pgs. 66-81 15 pgs Wed 12/11
Act 2 notes
pgs 83-96 13 pgs Thur, 12/12
pgs 96-111 15 pgs Fri, 12/13
pgs 112-120 8 pgs Mon, 12/16
Act 3 notes
pgs 121-130 9 pgs Tue 12/17
pgs 130-145 15 pgs Wed 12/18
Thur, 12/19 = Crucible On-Demand
Act 4 note
pgs 3-8 5 pgs. Tues, 12/3
pgs 8-20 12 pgs Thur, 12/5
pgs. 20-32 12 pgs Fri 12/6
pgs 33-48 15 pgs Mon 12/9
Act 1 notes
pgs 49-65 16 pgs Tues 12/10
pgs. 66-81 15 pgs Wed 12/11
Act 2 notes
pgs 83-96 13 pgs Thur, 12/12
pgs 96-111 15 pgs Fri, 12/13
pgs 112-120 8 pgs Mon, 12/16
Act 3 notes
pgs 121-130 9 pgs Tue 12/17
pgs 130-145 15 pgs Wed 12/18
Thur, 12/19 = Crucible On-Demand
Act 4 note
The Great Gatsby Reading Schedule
Date Assigned Pages/HW # pgs.
Tue 1/28 1-15 15
Wed 1/29 15-30 15
Thur. 1/30 30-44 15
Fri 1/31 45-59 14
Mon 2/3 61-74 13
Tue 2/4 74-89 15
Wed 2/5 89-103 14
Thur 2/6 103 -111 8
Fri 2/7 113-125 12
Mon 2/10 125-138 13
Tue 2/11 138-155 17
Wed 2/12 156-168 12
Thur 2/13 168-180 12
Be prepared for a quiz any time reading is due
Tue 1/28 1-15 15
Wed 1/29 15-30 15
Thur. 1/30 30-44 15
Fri 1/31 45-59 14
Mon 2/3 61-74 13
Tue 2/4 74-89 15
Wed 2/5 89-103 14
Thur 2/6 103 -111 8
Fri 2/7 113-125 12
Mon 2/10 125-138 13
Tue 2/11 138-155 17
Wed 2/12 156-168 12
Thur 2/13 168-180 12
Be prepared for a quiz any time reading is due
Monday, June 23, 2014
Library Receipt
FlashScan System
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Rancho Penasquitos Branch
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Title: Cracking the SAT:w
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City of San Diego Public Library
Rancho Penasquitos Branch
5/21/2014 7:36:16 PM
Title: Cracking the SAT:w
Item ID: 31336087816279
Date Due: 6/11/2014, 23:59
Title: The official SAT stu
Item ID: 31336090558280
Date Due: 6/11/2014, 23:59
2 Items
Renew at www.sandiegolibrary.org
or Call 619 236-5800 or 858 484-4440
and press 1 then 2 to RENEW
Your library card is needed
to renew borrowed items
printed by FlashScan System
www.LatCorp.com
Thursday, June 19, 2014
Chapter 16 Review Worksheet
What does Kw have at 25 degrees Celsius 1 x 10 ^-14
what are [H+] and [OH-] om am acidic solution? There is more [H+]
How does [H+] compare to [OH-] om a basic solution? There is more [OH-]
what range of ph values corresponds to acidic solutions? 1-6
what range of ph values corresponds to basic solutions? 8-14
Identify each as an acid or a base
H2SO4 acid
HCl acid
HNO3 Acid
NaOH base
H3PO4 Acid
Mg(OH)2 base
A solution has a Phof 3. What is the [H+] concentration 1 x 10^3
A solution has [H+] concentration of 1.0 x 10^-5 what is the Ph 5
A solution has a [OH- concentration of 2.7 x 10^-5 what is the pH 9.4
Fill in the blanks in the sentance, then predict the products of the chemical reactions
In the reaction of an acid with a base, hydrogen ions and hydroxide ions react to produce water and salt. This reaction is called neutralization
HCl+ Al(OH)3 = H20+ AlCl3
H2SO4+NaOH = H20 + HNaSO4
what are [H+] and [OH-] om am acidic solution? There is more [H+]
How does [H+] compare to [OH-] om a basic solution? There is more [OH-]
what range of ph values corresponds to acidic solutions? 1-6
what range of ph values corresponds to basic solutions? 8-14
Identify each as an acid or a base
H2SO4 acid
HCl acid
HNO3 Acid
NaOH base
H3PO4 Acid
Mg(OH)2 base
A solution has a Phof 3. What is the [H+] concentration 1 x 10^3
A solution has [H+] concentration of 1.0 x 10^-5 what is the Ph 5
A solution has a [OH- concentration of 2.7 x 10^-5 what is the pH 9.4
Fill in the blanks in the sentance, then predict the products of the chemical reactions
In the reaction of an acid with a base, hydrogen ions and hydroxide ions react to produce water and salt. This reaction is called neutralization
HCl+ Al(OH)3 = H20+ AlCl3
H2SO4+NaOH = H20 + HNaSO4
16.7
what is a neutralization reaction?
when a strong acid and a strong base produce a neutralized substance
what is a titration?
A titiration is the delivery of a measured volume of a solution being analyzed
what is a standard solution?
A solution known as a concentration
what is a buret?
a buret is a cylindrical device with a stopcock at the bottom that allows accurate measurment of the delivery of a given liquid
what is a stochimoteric point?
when the titrant is added slowly to the analyte until exactly enough has been added to just react with all of the anylate
when a strong acid and a strong base produce a neutralized substance
what is a titration?
A titiration is the delivery of a measured volume of a solution being analyzed
what is a standard solution?
A solution known as a concentration
what is a buret?
a buret is a cylindrical device with a stopcock at the bottom that allows accurate measurment of the delivery of a given liquid
what is a stochimoteric point?
when the titrant is added slowly to the analyte until exactly enough has been added to just react with all of the anylate
16.5
what are indicators?
the traditional way of determining the Ph of a solution
What is indicator paper?
A strip of paper coated with a combination of indicators
What is a ph meter ?
A Ph meter contains a probe that is very sensitive to the [H+]
the traditional way of determining the Ph of a solution
What is indicator paper?
A strip of paper coated with a combination of indicators
What is a ph meter ?
A Ph meter contains a probe that is very sensitive to the [H+]
16.4 notes
What is the Ph scale?
The Ph scale provides a convinent way to represent solution acidity.
what is the ph defined as
Ph = -log [H+]
what are the steps for calculating Ph on a claculator?
step 1: ENTER [H+]
step 2 : press the log key
step 3 : press the +/- (change of sign) key
Dating Tips
Touching
Friendly- shoulder push, tap, handshake Plausible deniability- touch around the shoulder or waist, touch on the forearm
Nuclear- face touch
Directed more brief glances at their intended
Engage in greater number of space maximization movements
Change location in the area more frequently
Wednesday, June 18, 2014
16.3 notes
what is a amphoteric substance?
when a substance can behave either as an acid or a base
what does ionization of water involve?
Ionization of water involves the transfer of a proton from one water molecule to another to produce a hydroxide ion and hydronium ion
What is Kw?
The ion-product constant for water
when a substance can behave either as an acid or a base
what does ionization of water involve?
Ionization of water involves the transfer of a proton from one water molecule to another to produce a hydroxide ion and hydronium ion
What is Kw?
The ion-product constant for water
16.2 notes
What is a strong acid?
A strong acid is an acid that is completely ionized
What is a weak acid? Weakly held together acids are weak acids
What is a dipratic acid?
An acid that can furnish two protons
What are oxyacids?
When acidic hydrogen is attache to an oxegen atom oxyacids are formed
what are organic acids? Organic acids are acids with a carbon atom backbone
A strong acid is an acid that is completely ionized
What is a weak acid? Weakly held together acids are weak acids
What is a dipratic acid?
An acid that can furnish two protons
What are oxyacids?
When acidic hydrogen is attache to an oxegen atom oxyacids are formed
what are organic acids? Organic acids are acids with a carbon atom backbone
16.1 Notes
What do acids produce?
Acids produce hydrogen ions
What do bases produce
Bases Produce hydroxide ions
What is the Arhenius concept of acids and bases limited ?
Because the concept only refers to hydrogen acids.
What does a conjugate acid-base pair consist of ?
It consist of 2 substances related to each other by the donating and accepting of a single proton
What is a hydrioum ion?
H30+
Acids produce hydrogen ions
What do bases produce
Bases Produce hydroxide ions
What is the Arhenius concept of acids and bases limited ?
Because the concept only refers to hydrogen acids.
What does a conjugate acid-base pair consist of ?
It consist of 2 substances related to each other by the donating and accepting of a single proton
What is a hydrioum ion?
H30+
Wednesday, June 11, 2014
Chemistry notes
- empirical formula- the formula of a compound that express the smallest whole-number ratio of the atoms present
- molecular formula- the actual formula of a compound- the one that gives the composition of the molecules that are present
- steps for determining the empirical formula of a compound
- step 1: obtain the mass of each element present (in grams)
- step 2 determine the number of moles of each type of atom
- step 3 divide the number of moles of each element by the smallest number of moles to convert the smallest number to 1. If all of the numbers so obtained are integers ( whole numbers), they are the subscripts in the empirical formula. If one or more of these numbers are not integers, go on to step 4
- step 4: multiply the numbers you derived in step 3 by the smallest integer that will convert all of them to whole numbers. This set of whole numbers represents the subscripts in the empirical formula.
- calculating PH
- step 1 [H+]
- press the log key press the +/- key
- PH = -log [H+]
- PH + pOH = 14
- steps for calculating [ H+]
- enter PH change the sign of the pH by using the +/- key
- Take the inverse log of -pH
- a solution is buffered by the presence of a weak acid and its conjugate base
- intermolcecular forces- forces that occur between molecules
- a dipole-dipole attraction: Molecules with dipole moments can attract each other by lining so that the positive and negative ends are close to each other
- London dispersion forces- the forces that exist among noble gas atoms and non polar molecules
- 0 degrees Celsius is normal freezing point
- 1 atm is normal pressure
Tuesday, June 10, 2014
17.1 - 17.3 pg 570 2-6
What is a collision model?
A collision model explains many characteristics of chemical reactions
17,2
What is activation energy?
A minumum energy needed for a reaction to occur
What are enzymes?
Catalyst inside your body
17.3
What are homogeneous reactions?
Reactions involving only one phase
What are heterogeneous reactions?
Reactions involving 2 phases
Pg 570 2-6
2. For the reaction N2(g) + 3 H2 (g) = 2 NH3, list the types of bonds that must be broken and the type of bond that must form for the chemical reaction to take place?
Hydrogen bonds must be broken while London Dispersion bonds form
3. How do chemists envision reactions taking place in terms of the collision model for reactions? Give an example of a simple reaction and how you might invision the reaction raking place
Reactions take place when atoms collide. When one atom hits another a reaction occurs
4. What does the activation energy for a reaction represent? How is the activation energy related to whether a collision between the molecules is successful?
The activation energy represents the minimum energy required for reaction to occur. If there is not enough energy a reaction won't occur
5. What is a catalyst? How does catalyst speed up a reaction?
A catalyst is a substance that speeds up a reaction. It speeds up a reaction by lowering the activation energy
6. What are catalysts in living cells called?
Why are the biological catalysts necessary
Catalysts in living cells are called enzymes. They are necessary because the use less heat for reactions
A collision model explains many characteristics of chemical reactions
17,2
What is activation energy?
A minumum energy needed for a reaction to occur
What are enzymes?
Catalyst inside your body
17.3
What are homogeneous reactions?
Reactions involving only one phase
What are heterogeneous reactions?
Reactions involving 2 phases
Pg 570 2-6
2. For the reaction N2(g) + 3 H2 (g) = 2 NH3, list the types of bonds that must be broken and the type of bond that must form for the chemical reaction to take place?
Hydrogen bonds must be broken while London Dispersion bonds form
3. How do chemists envision reactions taking place in terms of the collision model for reactions? Give an example of a simple reaction and how you might invision the reaction raking place
Reactions take place when atoms collide. When one atom hits another a reaction occurs
4. What does the activation energy for a reaction represent? How is the activation energy related to whether a collision between the molecules is successful?
The activation energy represents the minimum energy required for reaction to occur. If there is not enough energy a reaction won't occur
5. What is a catalyst? How does catalyst speed up a reaction?
A catalyst is a substance that speeds up a reaction. It speeds up a reaction by lowering the activation energy
6. What are catalysts in living cells called?
Why are the biological catalysts necessary
Catalysts in living cells are called enzymes. They are necessary because the use less heat for reactions
Homework Cover Sheet
Aaron Rodriguez
SQ5R 17.1- 17.2 10/10
sQ5R 17.3 10/10
pg 570 q 2-6 10/10
SQ5R 17.4-17.6 10/10
pg 549 S.c. 17.1 pg 547 FQ 1-5 10/10
sQ5R 17.8- 17.9 10/10
pg 558 s.c. 17.3 pg 571 q 21 10/10
pg 571 q 25,30,32 10/10
Reaction Rates Packet 0/10
Equillibrium Packet 10/10
Equilibrium Worksheet 10/10
Ch 17 Review worksheet 10/10
Distillation Page 10/10
120/130 work
1/0 E.C questions
10/10 table of contents
10/10 order and neatness
stamps: 80
Cb Jallene Bueta
SQ5R 17.1- 17.2 10/10
sQ5R 17.3 10/10
pg 570 q 2-6 10/10
SQ5R 17.4-17.6 10/10
pg 549 S.c. 17.1 pg 547 FQ 1-5 10/10
sQ5R 17.8- 17.9 10/10
pg 558 s.c. 17.3 pg 571 q 21 10/10
pg 571 q 25,30,32 10/10
Reaction Rates Packet 0/10
Equillibrium Packet 10/10
Equilibrium Worksheet 10/10
Ch 17 Review worksheet 10/10
Distillation Page 10/10
120/130 work
1/0 E.C questions
10/10 table of contents
10/10 order and neatness
stamps: 80
Cb Jallene Bueta
Reaction Rates
A. Determining Rates The rate of a reaction is determining in many ways. For example, if calcium is added to water, it reacts to produce a base according to the following equation.
Ca (s) + 2 H2O (l) + Ca 2+ (aq) +OH-(aq) + H2 (g)
1. Which of the following could be used to determine the rate of the reaction C
A. amount of Ca (s) remaining B. Color of the reaction solution
C. Amount of H2 (g) produced D. Concentration of OH-
2. Can the rate of the reaction be determined with just one measurement of the factor(s) you choose above or would several measurements be necessary? Why?
No. Because there are multiple factors to the rate of reaction
The following graph shows the amount of Ca remaining during the above reaction over a period of time. Remember that when the reaction proceeds quickly, calcium disappears quickly. Answer the question that follow by referring to the graph
3. In which time span is the reaction the fastest? 3-10 sec
4. During which time periods is the reaction rate nearly constant? Explain how you determine this from the graph.
10-13 seconds. The line is almost flat
5. What is the approximate average rate of this reaction during the first five seconds?
0.6 g/s
6. Magnesium is chemically similar to calcium, yet it reacts very slowly with water. Strontium is also in group 2A, just below calcium. What sort of reaction rate do you expect strontium to have to have with water?
Account for any differences you describe.
A even slower reaction than all of them because it is lower on the periodic table
B. Factors Affecting Rate
The rates of chemical reactions depend upon a number of factors. These factors are controlled by scientists in order to cause process to proceed at at desired rates. For each of the following factors, write its probable effect ( increase, decrease, no effect) on rate and then explain the effect on the basis of collision theory, if the theory applies
C Potential Energy Diagrams
The potential energy of substances involved in a reaction are plotted versus the progress of the reaction, as the process moves from initial reactants through activated complex, to final products,
On the grid provide, plot an energy diagram for the reaction described by the following information. Then answer the questions that follow
1. Potential energy of reactants 250 kJ/mol
Potential energy of activated complex: 350 kJ/mol
Potential energy of products : 300 kJ/mol
a. What is the value of ΔH?
Is the reaction exothermic or endothermic?
endothermic
Draw a dotted line on the grid above to show what happens to the reaction if a catalyst is added. Describe what happens to the energies of reactants, products, and activated complex and explain the effect on the rate
The energies of the activated complex go down, but everything else stays the same
2. Study the energy diagram below and fill in the blanks. Then answer the question that follow.
a. Potential energy reaction 100 kJ/mol
b. Potential energy of activated complex 110 kJ/mol
c. Activation energy: 396 kJ/mol
d. Potential energy of products 50 kJ/mol
ΔH: 100
f. Is the reaction exothermic or endothermic?
endothermic
g. How can you tell
The loss in potential energy turns to heat
Critical Thinking
The temperatures in an internal combustion engine favor the production of nitric oxide. Nitric oxide from car exhaust then reacts with oxegen in the atmosphere to produce brown, acrid nitrogen dioxide according to the equation below. Answer the questions that follow about collision theory and reaction mechanism
2NO(g)+ O2(g) = 2NO2(g)
1. Why does collision theory predict that this reaction is unlikely to occur in one step?
Because there are more molecules on the reactants side
2. The proposed reaction mechanism for the overal reaction is
Step 1: NO(g) + O2 = NO3 (fast reaction)
Step 2 NO3 (g) + NO (g) = 2NO2 ( slow reaction)
a. 0what is the rate-determining step for this reaction?
Whether it is reversible
Why will the concentration of oxegen gas have little effect on the reate of the overall reaction?
Because the equation is balanced
3. Why does collision theory predict that the formation of an activated complex is a necessary step in the process of any reaction?
Because molecules need to collide to react
Reaction Rate Word Scramble
Use the clues provided to help you unscramble the letters below to form words replied to Chapter 17. The letters in the circles will then spell out an important word.
1. Activated molecule 1. xocepml complex
2. Slows down a reaction 2. RTIIONBIH inhibitor
3 speeds up a reaction 3. cytlstaa catalyst
4 Particles important in determining rate 4. slclmueoe Molecules
5 Energy 5. tvaatoinic Activation
6 sequence steps 6. emamscnih mechanism
7 Percent of effective collisions 7. yicnefceif efficiency
8 moles per liter, for example 8. teccnnrooitan concentration
9 chemical change 9. aernotci reaction
Word: collision
Ca (s) + 2 H2O (l) + Ca 2+ (aq) +OH-(aq) + H2 (g)
1. Which of the following could be used to determine the rate of the reaction C
A. amount of Ca (s) remaining B. Color of the reaction solution
C. Amount of H2 (g) produced D. Concentration of OH-
2. Can the rate of the reaction be determined with just one measurement of the factor(s) you choose above or would several measurements be necessary? Why?
No. Because there are multiple factors to the rate of reaction
The following graph shows the amount of Ca remaining during the above reaction over a period of time. Remember that when the reaction proceeds quickly, calcium disappears quickly. Answer the question that follow by referring to the graph
3. In which time span is the reaction the fastest? 3-10 sec
4. During which time periods is the reaction rate nearly constant? Explain how you determine this from the graph.
10-13 seconds. The line is almost flat
5. What is the approximate average rate of this reaction during the first five seconds?
0.6 g/s
6. Magnesium is chemically similar to calcium, yet it reacts very slowly with water. Strontium is also in group 2A, just below calcium. What sort of reaction rate do you expect strontium to have to have with water?
Account for any differences you describe.
A even slower reaction than all of them because it is lower on the periodic table
B. Factors Affecting Rate
The rates of chemical reactions depend upon a number of factors. These factors are controlled by scientists in order to cause process to proceed at at desired rates. For each of the following factors, write its probable effect ( increase, decrease, no effect) on rate and then explain the effect on the basis of collision theory, if the theory applies
C Potential Energy Diagrams
The potential energy of substances involved in a reaction are plotted versus the progress of the reaction, as the process moves from initial reactants through activated complex, to final products,
On the grid provide, plot an energy diagram for the reaction described by the following information. Then answer the questions that follow
1. Potential energy of reactants 250 kJ/mol
Potential energy of activated complex: 350 kJ/mol
Potential energy of products : 300 kJ/mol
a. What is the value of ΔH?
Is the reaction exothermic or endothermic?
endothermic
Draw a dotted line on the grid above to show what happens to the reaction if a catalyst is added. Describe what happens to the energies of reactants, products, and activated complex and explain the effect on the rate
The energies of the activated complex go down, but everything else stays the same
2. Study the energy diagram below and fill in the blanks. Then answer the question that follow.
a. Potential energy reaction 100 kJ/mol
b. Potential energy of activated complex 110 kJ/mol
c. Activation energy: 396 kJ/mol
d. Potential energy of products 50 kJ/mol
ΔH: 100
f. Is the reaction exothermic or endothermic?
endothermic
g. How can you tell
The loss in potential energy turns to heat
Critical Thinking
The temperatures in an internal combustion engine favor the production of nitric oxide. Nitric oxide from car exhaust then reacts with oxegen in the atmosphere to produce brown, acrid nitrogen dioxide according to the equation below. Answer the questions that follow about collision theory and reaction mechanism
2NO(g)+ O2(g) = 2NO2(g)
1. Why does collision theory predict that this reaction is unlikely to occur in one step?
Because there are more molecules on the reactants side
2. The proposed reaction mechanism for the overal reaction is
Step 1: NO(g) + O2 = NO3 (fast reaction)
Step 2 NO3 (g) + NO (g) = 2NO2 ( slow reaction)
a. 0what is the rate-determining step for this reaction?
Whether it is reversible
Why will the concentration of oxegen gas have little effect on the reate of the overall reaction?
Because the equation is balanced
3. Why does collision theory predict that the formation of an activated complex is a necessary step in the process of any reaction?
Because molecules need to collide to react
Reaction Rate Word Scramble
Use the clues provided to help you unscramble the letters below to form words replied to Chapter 17. The letters in the circles will then spell out an important word.
1. Activated molecule 1. xocepml complex
2. Slows down a reaction 2. RTIIONBIH inhibitor
3 speeds up a reaction 3. cytlstaa catalyst
4 Particles important in determining rate 4. slclmueoe Molecules
5 Energy 5. tvaatoinic Activation
6 sequence steps 6. emamscnih mechanism
7 Percent of effective collisions 7. yicnefceif efficiency
8 moles per liter, for example 8. teccnnrooitan concentration
9 chemical change 9. aernotci reaction
Word: collision
Iodine Clock Lab
On a molecular level, why should more concentrated solutions react more quickly than less concentrate ones?
Because there is more of a solution to react
On a molecular level, why should warm solutions react more quickly than cooler ones?
Because molecules move faster
You are to prepare a solution by mixing 10.0 mL of 0.20M KlO3 with 10.0 mL of water. What is the final concentration in your diluted solution?
0,2/1 0.01/1= 0.0020 mol/g
Suppose that you are preparing another solution by mixing 25.0mL of 0.33M KlO3 with 18.0 mL of 0.50 M H2SO3. NO chemical reaction occurs in the process ( just like mixing with water). What is the final concentration of the KlO3 in this solution?
0.025 0.33/1 = 0.00825 mol/0.023 L-0.018L = 0.019 M
Directions: Measure the time in seconds for reaction to take place under various conditions
Part 1 Effect of concentration: Time is from the instant of mixing until the first sign of color.
A. 10 ml B + 10 ml A
B. 10.0 ml B + (8.0ml A +2.0 ml H20
C 10.0 ml B + (6.0 ml A + 4.0 ml H20)
D 10 ml B + ( 4.0 ml + 6.0 ml H20)
E 10.0 ml B + (2.0 ml A + 8.0 ml H2O)
Part 2 Effect of temperature:
Mix 10.0 ml A + 10,0 ml B full strength at each temperature ( see data table #2 for your table's temperature assignments!)
Note: Both solutions must be at the specified temperature before mixing.
0.2 M (0.001 L) = 0.00070 mol KIO3/ milliliter
M(L)= mol
M1 V1 = M2 V2
0.020M (10,0mL)
M2 + 0.02 mL
0.02 M
0.016 M
0,012 M
0.008 M
0.004 M
What General relationship between concentration A and time of reaction can you derive from the graph?
There is a linear relationship
How is the time of a reaction related to the rate of that reaction ?
The time of reaction would be higher if the rate is slower
What General relationship temperature and time of reaction can you derive from the graph?
There is a scattered relationship
Make a prediction of the time the reaction should have taken at 0°C and 75°C
15 seconds
Why is it important to keep the total 10.0mL during the dilutions of solution A? What should happen if you used a greater amount than 10 ml
The mixtures would stay the same. The reaction time would change
What would happen if you mixed the solutions in part 2 at room temperature instead of at the specified temperature?
I would have been slower
Sunday, June 8, 2014
Why I Deserve an A in your Class
I
believe that I deserve an A in your class because I have worked hard in your
class and have grasped the material that you have taught us. The way that I have
worked hard in your class is getting into the room and immediately working on
the work that I need to get done. Some days I have stayed in the class to work
on projects to get them done. The material that I have grasped in your class is
green screening and in the studio I have learned to use Q lab and have ran all
the other stations. In the first project I worked collaboratively on the Magno
Minute with Steve. We worked on the angle and lighting for the interview. We
also found a way that Mr. Magno could read his script and look at the camera.
The way that we fixed this problem is by taping the paper with all the
questions and propping them up on a board. In the second project my partner and
I worked on the Izze commercial. The things that I learned to do on this
project was furthering my green screening skills as well as learning how to use
motion and make still images move. We did not run into any problems in these
projects besides some minor questions that you answered for us. I worked also
on the editing and finding of different sound effects which further developed
my skills as a video production student. On the final project my partner and I
made a commercial of the sports teams highlighting their accomplishments. In
this project I found the video we would use and the music. I also cut up the
video to highlight the top plays and got rid of unnecessary video. I believe
that I deserve an A in your class because I have worked hard in the class and
have learned many new skills which I have applied in the videos that I have
made.
Junior Paper Reflection
JP Reflection
Please
answer the following as accurately as you can. You do not need to write out the
questions, just answer as honestly as you can. Please number each response 1-6.
1.
What
was most valuable to you during the junior paper process?
2.
What
was least valuable during this process?
3.
What
skills did you learn that you think will be valuable in your future?
4.
What
would you like to see added/changed for the junior paper process?
5.
How
do you feel about your final JP product? (Did you fix everything, were you lazy
at times?)
6.
If
you could change anything about your personal experience with the JP, what
would it be?
Chemistry Review Answers
ANSWERS TO CHEMISTRY FINAL
REVIEW Chem 2 2010-2011
1.
C 45. D 89. A
2.
D 46. D 90.
A
3.
E 47. D 91. E
4.
E 48. D 92. B
5.
B 49. A 93. D
6.
B 50. C 94. A
7.
4,030 g MgO 51. B 95. B
8.
D 52. D 96. D
9.
B 53. B 97. C
10.
C 54. B 98. A
11.
B, D 55. D 99. D
12.
A, C, E 56. B 100. B
13.
a) Q, b) DHfus, c) DHVAP, d)Q
57. C 101. A
14.
A 58. A 102. B
15.
D 59. B 103. A
16.
C 60. A 104. C
17.
A 61. D 105. B
18.
C 62. D 106. D
19.
A 63. D 107. B
20.
D 64. C 108. A
21.
E 65. A 109. B
22.
C 66. D 110. B
23.
E 67. C 111. B
24.
D 68. C 112. C
25.
D 69. B 113. A
26.
A 70. E 114. D
27.
D 71. E 115. C
28.
A 72. D 116. B
29.
A 73. A 117. C
30.
C 74. D 118. D
31.
D 75. C 119. E
32.
B 76. D 120. C
33.
A 77. E 121. D
34.
B 78. E 122. B
35.
B 79. A 123. B
36.
C 80. D 124. A
37.
C 81. C 125. D
38.
D 82. A 126. A
39.
B 83. A 127. B
40.
E 84. E 128. C
41.
E 85. B 129. E
42.
B 86. B 130. D
43.
E 87. D 131. E
44.
D 88. A 132. D
133.
B
134.
C
135.
C
136.
A
137.
A
138.
B
139.
A
140.
A
141.
B
142.
D
143.
C
144.
A
145.
B
146.
C
147.
C
148.
A
149.
D
150.
D
151.
B
152.
A
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