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Archive – Q4 week 1 – 20 – 21

Week of 4/12 – 4/16 – PLEASE REFRESH EVERY TIME!

Please Refresh every time you open– this page is changing often!
The 4 day – A, B, C, D cycle looks like this:
                                                       Day                               Period
                                                                           2                       3                       4       
                
                                   In class:                          Lab                   Lab               Single Class
                                   Remote:                          Lab                   Lab               Single Class
 
                                    In class:         B          Single Class        LAB                   LAB
                                                          Remote:                     Single Class        LAB                   LAB
 
   Monday                       In class:              C          Single Class              LAB                    LAB
                                   Remote:                     Single Class        LAB                    LAB
 
                                       In class:          D               Lab                   Lab              Single Class
                                   Remote:                            Lab                   Lab              Single Class
                 
This weeks 5 day Schedule:
 
4/12  –  Monday –  “C” Day   – period 2, –  I    2(A,C) 3(A)  AP CHEMISTRY
                                                      – period 2, –  R   2(A,C) 3(A) REMOTE INSTRUCTION
                
                                                        -period 3,4 (LAB) – I.  3(C) 4(A,C) AP CHEMISTRY 
                                                        -period 3,4 (LAB) – R  3(C) 4(A,C) REMOTE INSTRUCTION
 
4/13  –  Tuesday –  “D” Day    – period 2,3 (Lab)  –  I   2(B,D) 3(D) AP CHEMISTRY
                                                       – period 2,3 (Lab) –  R  2(B,D) 3(D) REMOTE INSTRUCTION
  
                                                             – period 4 – I  3(B) 4(B,D) AP CHEMISTRY
                                                             – period 4 – R 3(B) 4(B,D) REMOTE INSTRUCTION
 
4/14  – Wednesday –  “A” Day           – period 2,3 (Lab) –     2(A,C) 3(A)  AP CHEMISTRY
                                                                    – period 2,3 (Lab) –  R   2(A,C) 3(A) REMOTE INSTRUCTION
                                                                   – period 4 – I   3(C) 4(A,C) AP CHEMISTRY 
                                                                   – period 4 – R  3(C) 4(A,C) REMOTE INSTRUCTION
4/15  – Thursday –  “B” Day             period 2,  –  I   2(B,D) 3(D) AP CHEMISTRY
                                                          -period 2, –  R   2(B,D) 3(D) REMOTE INSTRUCTION
 
                                                            -period 3,4 (LAB) – I   3(B) 4(B,D) AP CHEMISTRY
                                                            -period 3,4 (LAB) – R  3(B) 4(B,D) REMOTE INSTRUCTION
4/16  –  Friday –  “C” Day        – period 2, –  I    2(A,C) 3(A)  AP CHEMISTRY
                                                      – period 2, –  R   2(A,C) 3(A) REMOTE INSTRUCTION
                
                                                        -period 3,4 (LAB) – I.  3(C) 4(A,C) AP CHEMISTRY 
                                                        -period 3,4 (LAB) – R  3(C) 4(A,C) REMOTE INSTRUCTION
 

4/12  –  Monday –  “C” Day   – period 2, –  I    2(A,C) 3(A)  AP CHEMISTRY
                                                      – period 2, –  R   2(A,C) 3(A) REMOTE INSTRUCTION
                
                                                        -period 3,4 (LAB) – I.  3(C) 4(A,C) AP CHEMISTRY 
                                                        -period 3,4 (LAB) – R  3(C) 4(A,C) REMOTE INSTRUCTION
Zoom Link:
Topic: AP Chemistry – 04.12 Periods 2,3,4
Time: Apr 12, 2021 07:00 AM Eastern Time (US and Canada)
 
Join Zoom Meeting
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Today is about modeling equilibrium problems, specifically Ksp (solution equilibrium)
 
1. Review of homework worksheet:
 
Equlibrium 3 – Equilibrium constants 1.pdf
View Download
 
Equlibrium 3 – Equilibrium constants 1 key.pdf
View Download
 
2. Continue with rest of worksheet the Quadratic Catastrophe
     “Approximating away the Catastrophe”.
 
3. Circumventing the Quadratic Catastrophe
     Approximating away the Catastrophe”.
 
Equlibrium 6a Small equilibrium constants.pdf
Equlibrium 6a Small equilibrium constants key.pdf
View
 Download
 
4. Solving for Ksp value, Common ion effect, Approximating away the Catastrophe with Ksp, 
 

Equlibrium 5 – Ksp.pdf

    
Equlibrium 5 – Ksp KEY.pdf
View Download
 
 
      
Derivation with Keq, Enthalpy and Temperature : (optional)

YouTube Video

THis weekend we introduced a new Keq that we call Ksp when we look at ionization reactions:
 
 AgCl(s)  <----->     Ag+(aq)   +    Cl(aq)
 
Keq or Ksp = [Ag+][Cl]
 
All ionization reactions have the same general reactions so all the equilibrium expressions look the same. Its called a solubility product (Ksp) instead of Keq because its Ksp depend on the product of the ions in solution. The more ions in solution at equilibrium the higher the Ksp thus the more soluble the salt is.  We can measure solubility based on equilibrium constants. We do not consider the AgCl (s) in the equilibrium expression because it is a solid, which has no dilution ability.
 
 
4/12  –  Monday –  “C” Day – Homework – 
 
I have Ksp Notes posted in 3rd quarter that go over every type of problem.
Many past students have said they were very helpful.
1.  Please complete – Equilibrium 4 – Question 1 – Ksp problem explained/modeled – lecture below.
     
Equilibrium 4 – Equilibrium constants 2.pdf
View Download
 
Equlibrium 4 – Equilibrium constants 2 KEY.pdf
View Download
 
2.  Please complete Equilibrium 3. – Question 3 – Backside – Quadratic Catastrophe Lecture below.
        Just watch me review this problem. Please.
 
Equlibrium 3 – Equilibrium constants 1 key.pdf
 
Equlibrium 3 – Equilibrium constants 1.pdf
View Download
 
3.  Please complete Equilibrium 6a – Circumventing the Quadratic Catastrophe Lecture.
Lecture below.  You should work with me to complete this equilibrium problem!
 
Equlibrium 6a Small equilibrium constants key.pdf
View Download

 

4: Complete  Equlibrium 5 – Ksp.pdf worksheet and/or with me with the lecture below:
If you feel that you are on your way feel free to complete without video lecture and review with the key below.  YOUR ARE TO COMPLETE LETTER D in the question. In the video I say not to but please complete it and review with Key.
 
Equilibrium 5 Lecture: see below 
 
Equlibrium 5 – Ksp KEY.pdf
View Download
Equlibrium 5 – Ksp.pdf
View Download
5:  Complete Equlibrium 5a – Ksp.pdf worksheet with me with lecture below:
Equlibrium 5a – Ksp continues.pdf
View Download
 
Equlibrium 5a – Ksp continues key p.pdf
View Download

Classwork Lecture 1: Equilibrium 4 – question 1 use the backside for space.
Classwork Lecture 2 : The Quadratic Catastrophe lecture – 
Classwork Lecture 3: Circumventing the Quadratic Catastrophe
Start this at 12:00 – Approximation Lecture – 
Equilibrium 5 Lecture: 
 
Homework Lecture: Equilibrium 5a Lecture: 
 
 You are studying for AP with this work!
 
End of Monday…

4/13  –  Tuesday –  “D” Day    – period 2,3 (Lab)  –  I   2(B,D) 3(D) AP CHEMISTRY
                                                       – period 2,3 (Lab) –  R  2(B,D) 3(D) REMOTE INSTRUCTION
  
                                                             – period 4 – I  3(B) 4(B,D) AP CHEMISTRY
                                                             – period 4 – R 3(B) 4(B,D) REMOTE INSTRUCTION
 
Zoom Link:
Topic: AP Chemistry – 04.13 – Periods 2,3,4
Time: Apr 13, 2021 08:00 AM Eastern Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/84249331456?pwd=UVdoSmdjWWJPcnA5RlArVzRZY0lFQT09
Meeting ID: 842 4933 1456
Passcode: 5gB49U
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*I have notes that are posted in their separate page (in the 3rd quarter) for Ksp! Every skill that you need in Ksp is posted is reviewed in here. Those that like a textbook. I have posted my version there.
 
 
1:  Quick General review of Ksp/equilibrium/Q vs Keq – used New Ksp notes
 
2:  Ksp TEST – (10 point) AP Question –  1 question part 2 test – (20 minutes) 
 
Today’s Test Keys:
 
 
3.  Review of test and practice with the homework Ksp practice problem.
 
4/13  –  Tuesday –  “D” Day – HomeworkTomorrow you will have a 40 minute test that consists 
                                                                                     of 2 part sections 1 will be a Ksp question and the other 
                                                                                     will be a thermo question.
 
1.  Review the PRACTICE Test with the keys below if you did not do so in class.
You will have a 2 question (40 minute) part 2 TEST tonight.  A good review would be the following AP questions.
2:  Please complete Equilibrium 5b – Ksp practice.pdf  and review with key below.
      I made a lecture for this problem below!
 
***In Question (b) ii  of Equilibrium 5b – Ksp practice.pdf I did not finish the sentence: 
Calculate the minimum concentration of F(aq)  necessary to initiate precipitation of the salt selected in part (b)(i).
 
Today’s Test Keys
Ksp Free Response 2010 ques 1 KEY Grodski Board p.pdf
View Download
 
Ksp Free Response Test 2010 ques 1 KEY College Board.pdf
View Download
Ksp Practice: Another Ksp problem!
Equilibrium 5b – Ksp practice.pdf
View Download
 
Equilibrium 5b – Ksp practice key (AP Central key).pdf
View Download
 
Lecture on the Ksp Practice – Equilibrium 5b – Ksp practice.pdf:
4.  These 2 Free Response problems will be collected tomorrow:
       Please try giving yourself a total of 40 minutes for this test.
 
Each 10 point Free Response question should take 20 minutes to stay on pace.
 
I understand that not everyone will do abide by the 40 minute time limit so I would try it for 40 minutes and then add to it after the time limit is up to know how you are doing with the pacing.
 
Equilibrium 5c – Ksp 2001 2006 Test.pdf
View Download
AP grade and Scaled Percentage Score:
 

 

Example of calculating scaled score:
 
Lets say student scores a 6/10 on a 1o point free response question.
 
6/10 = 60% —-> AP grade of 3  because it falls between 44 – 63 in the rubric above.
 
Now I decided an AP Grade of 3 is equal to an 80% of a regular test grade at the minimum and that an AP Grade of 4 is equal to a 90% of a regular test grade at the minimum.
Now a score of 60% of the raw grade is a very high AP grade of 3 as it close to the 63 – 64 cutoff point for an AP Grade of 4 so the scaled percentage should reflect a score closer to the minimum regular test grade of 90% for a AP Grade of 4.
 
                                                    AP Grade of 3  ———————->  AP Grade of 4
on regular test =                              80                                                             90
Raw grade AP Rubric=                 44                                                              63                                                  
 
Actual Graded Raw grade =                                                     60
 
Since it is closer to to the 63 cutoff for a 90 I need to calculate what percentage the actual graded raw grade is from the range of 44 – 63:
 
                                                                             60  –  44    =   .84 (of the range from the minimum)
                                                                             63  –  44
 
So a raw grade of 60 is .84 the from the minimum value of 44.  NOW since I decided that an AP grade of 3 is equivalent to an 80 on a regular test and an AP grade of 4 is equivalent to an 90 on a regular test the range of points in a regular test between the 2 AP grades is 10: 90 – 80 = 10
 
So to find how many points I add to the minimum regular test score for the raw grade of 60:
 
                                                                                .84   x   10 =  8.4 
 
                                                            And the actual test grade is now:  80 + 8.4 = 84 (Power school grade)
 
End of Tuesday..

4/14  – Wednesday –  “A” Day           – period 2,3 (Lab) –     2(A,C) 3(A)  AP CHEMISTRY
                                                                    – period 2,3 (Lab) –  R   2(A,C) 3(A) REMOTE INSTRUCTION
                                                                   – period 4 – I   3(C) 4(A,C) AP CHEMISTRY 
                                                                   – period 4 – R  3(C) 4(A,C) REMOTE INSTRUCTION
 
Zoom Link:
Topic: AP Chemistry – 04.14 Periods 2,3,4
Time: Apr 14, 2021 08:00 AM Eastern Time (US and Canada)
Join Zoom Meeting
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1. Review of Take Home Test:
 
Last night’s Ksp and thermo Free Response Test Keys: 
College Board Key and grading Rubric:
 
Equlibrium 5c – Ksp 2001 2006 college board key ques 1 and 2.pdf
View Download
 
Grodski Board Key:
Equlibrium 5c – Ksp 2001 2006 Grodski Key p.pdf
View Download
 
LAST NEW TOPIC: Rate Law – path function
 
2. Intro to Rate Law – Last New topic! We are very close to being done with the entire course!
 
    a) You are to read my notes on RATE LAW that is posted in the 3rd quarter:
        https://sites.google.com/a/whbschools.org/grodski-ap-chemistry/3rd-quarter/rate-law-notes                                                                       
*You are to read my notes up to and including skill 5!  I have worked really hard to write a complete chapter in RATE Law that I hopefully is clear and logical and breaks down every skill you need to learn.
RATE LAW looks daunting at first but trust me everyone loves rate law once you let it sink in.  PLEASE do this before you view todays class lectures.  The Lectures will make MUCH more sense.
    b) Rate Law Lecture 1 is what I did today, keeping in mind what you read in the Rate Law Notes.
Rate Law Intro Lecture 1:
 
Rate Law Presentation that I used in the lectures:

Rate Law

 
Rate Law Intro Lecture 2:  Please use this with your homework
4/14  – Wednesday –  “A” Day  – Homework:
 
You really need to view the RATE LAW NOTES and lecture 1 Before moving on to the homework!
 
1.  Please watch the Rate Law intro Lecture 2 above and follow along with the 
     Kinetics honors rate law rumble –  worksheet and complete Kinetics honors rate law rumble worksheet 
     (questions 2 and 4).
___________________________________
RATE LAW SKILLs (in your notes) :  #1, #2, #3, #4, #5, #7
 
Rate Law Rumble 1819.pdf
View Download
 
Kinetics honors rate Law rumble key p – pdf.pdf
View Download
 
 
2: Please complete 2005B problem in Kinetics 1 – rate law.pdf  worksheet (first side).
___________________________________
RATE LAW SKILLs (in your notes) :  #1, #4, #7
Kinetics 1 – rate law.pdf
View Download
 
Kinetics 1 – rate law key.pdf
3.  Please complete the following problems in the first page of this packet, 1984B only!
 
*Skip question C – we will learn that Friday.
________________________________________
RATE LAW SKILLs (in your notes) :  #1, #3, #4, #5, #7
 
Kinetics 2 – rate law.pdf
Kinetics 2 – rate law KEYp .pdf
View Download
Complete RATE LAW Skills from the NOTES:
Skill #1 – Identify the orders of the reaction from the experimental evidence – Eyeball method
Skill #2 – Determining catalysts and intermediates in mechanisms
Skill #3 – Determining Rate Law from mechanisms or evaluating the best mechanism
Skill #4 – Determine the rate law constant with correct Units
Skill #5 – Calculate the Rate for the initial concentrations that are not in the experiment.
Skill #6 – Determine the Stoichiometric loss of reactants to gain of products
Skill #7 – Solve for the Rate Law orders without EYEBALL method
Skill #8 – Solve for the Rate Law orders with Graphs 
Skill #9 – Solve for time, concentration, or using integrated Rate Law formulas
 
End of Wednesday..

4/15  – Thursday –  “B” Day       period 2,  –  I   2(B,D) 3(D) AP CHEMISTRY
                                                           -period 2, –  R   2(B,D) 3(D) REMOTE INSTRUCTION
 
                                                            -period 3,4 (LAB) – I   3(B) 4(B,D) AP CHEMISTRY
                                                            -period 3,4 (LAB) – R  3(B) 4(B,D) REMOTE INSTRUCTION
Zoom Link:
 
Topic: AP Chemistry – 04.15 – Period 2, 3, 4
Time: Apr 15, 2021 08:00 AM Eastern Time (US and Canada)
 
Join Zoom Meeting
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*Quick review of yesterdays notes – I did not mention which mechanism 1 or 2 was the best
 
1. Review Rate Law Rumble 1819.pdf and Kinetics 2 – 1984 B – 
 
a) Catalyzed reactions – demo
 
* Eyeball method vs. Mathematical method of finding the orders
 
Kinetics 2 – rate law KEYp .pdf
View Download
 
2. Fast Equilibrium mechanisms – 
 
Kinetics mechanisms – fast equilibrium.pdf
 
Kinetics mechanisms – fast equilibrium KEY.pdf
View Download
3: Please complete the Kinetics 2 – worksheets specifically 1991B and 1994B and review with the     
    key.  These questions have the same skills but include the fast equilibrium.
Kinetics 2 – rate law.pdf
Kinetics 2 – rate law KEYp .pdf
View Download
Fast equilibrium- Lecture: 
 
4/15  – Thursday –  “B” Day   Homework – 
 
Integrated Rate Law Formulas
 Please follow these instructions. If you do these out of order you will not learn an reinforce the concepts that I want you to review.
 
1:  Please watch the Monday nights’ Lecture below on the derivation of the 0th, 1st, and 2nd Order Integrated  Rate Law formula. 
 These formulas help us utilize time with changes in our reactant concentrations!  
These formulas are integrated formulas (Calculus) and they are needed to link “real time” with actual concentrations (area under curve).  Remember that Rate Law is the Rate from INITIAL CONCENTRATIONS of reactants. That Rate that we have been calculating for changes the instant the chemical reaction starts so it really becomes useless AFTER some time period after time zero.  They utilize concepts of derivative and integrals which many of you have NOT had in math YET! You do not need to use these concepts to answer the following questions, just the formulas:
 
How long does it take for the reaction to be completed?
How long does it take for the concentration of my reactant to reach a certain value?
Given the time, how much of the reactant remains?
What is the shelf life of the chemical? (how long does it take to decompose?)
 
2. Read the notes on the new INTEGRATED RATE LAW Formulas – Skill 8 and Skill 9
 
3: Complete the Form that goes along the video (this will be in auto-reply)
*4: Complete the following worksheet and review with the keys: 
Give yourself 40 minutes, these are 2 part 2 questions, then grade. The goal is 7 out of 10.
 

2005B 2009 Kinetics quiz 2013 with college board and grodski keys.pdf

 
These formulas are USED WITH TIME!! They are used 2 ways.
 
1: They can be used to identify the Rate Order By how they are graphed. For instance if you graph a 1st order reaction using the ln[A]t  (ln of concentration of reactant at some time period) in the y axis and the t (time)  in the x axis it will be linear with a negative slope.  If it is not linear with a negative slope then the reactant is not 1st order.
See the reference table below.
2: Once you identify the whether the RATE ORDER is 1 or 2 use the correct integrated rate law equation to solve either the time (t), initial concentration [A]0 , concentration of reactant after some time[A]t ,
or the rate constant, k.
What this lecture describes is the mathematics  (Calculus ) needed to solve for or Link Time with remaining reactants.  These important derivations will derive our Integrated Rate Law Formulas that are given to us in our reference tables.   They help us identify the order (or exponents) of our reactants in our Rate Law Equation just by graphing the changes of concentrations of the reactants in time during a chemical reaction.   
 
Here they are in our reference tables:

It is usually very helpful to utilize these equations when you arrange them into a linear equation.

  1st Order:                   X   –>  Y  
 
                                    R = K [X]1    
                                
                             ln[A]t – ln[A]0 =  -kt
 
                             ln[A]t  =   -kt   +    ln[A]0
                                y      =    mx  +      b
                                        (negative slope)

 

 2nd Order:                X  +   X  –>  X2
 
                                           –       =  kt
                                 [A]t    [A]0
 
                                             =  kt   +    1
                                 [A]t                [A]0   
 
                                           y     = mx  +   B
                                                                               (positive slope)
 
 
 

 

THursday Night’s Lecture:
 
Chemistry Calculus Presentation that I used in the lecture above.

Chemistry Calculus

 

Thursday’s Night’s form:

 
Chemistry Calculus Basics in a screencast lecture: 
This was part of the Thursday’s nights lecture.
Derivation of the Integrated Rate Law formulas in a screencast lecture.
This was part of the Thursday nights lecture.
Yesterday’s Catalyzed Hydrogen Peroxide’s Decomposition Reaction:
End of Thursday..

4/16  –  Friday –  “C” Day        – period 2, –  I    2(A,C) 3(A)  AP CHEMISTRY
                                                        – period 2, –  R   2(A,C) 3(A) REMOTE INSTRUCTION
                
                                                        -period 3,4 (LAB) – I.  3(C) 4(A,C) AP CHEMISTRY 
                                                        -period 3,4 (LAB) – R  3(C) 4(A,C) REMOTE INSTRUCTION
 
Zoom Link:
Topic: AP Biology – 04.16 Periods 2,3,4
Time: Apr 16, 2021 08:00 AM Eastern Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/81883835854?pwd=eGFBbzBKVll0QXRwSFlmN3ljT3IzQT09
Meeting ID: 818 8383 5854
Passcode: gwbP6J
One tap mobile
+16465588656,,81883835854#,,,,*426524# US (New York)
 
 
1. Integrated Rate Law Review:
 
Class Lecture of the review of Integrated Rate law Equations and your homework:
Rate Law Problem review from 2005 Homework:
                                                                                            
Reference Table:

       This is the first order integrated formula.

        This is the second order integrated formula.

There is no zero order integrated formulas on the AP.

This is the Arrhenius equation that ties activation energy ( Ea) and temperature to the rate law constant. 

2. REVIEW – 2005B 2009 Kinetics quiz 2013 with college board and grodski keys.pdf
 
3. Review selected Problems from Kinetic 2, REdo 2005B question:
 
Kinetics 2 – rate law.pdf
Kinetics 2 – rate law KEYp .pdf
View Download
4. Half Life and their formulas and implications:
5. Arrhenius Equation (Ea) – 
Rate LAW presentation:

Rate Law

 
Today’s Virtual Lab:
 
 
Knowing that the iodate ion was 1st order from today, how did I set this up?
4/16  –  Friday –  “C” Day  – Homework –  
1. Complete a 5 question MC form on rate law.
Catalysts and Activation Energy (Ea = Activation Energy)
The Arrhenius equation calculations are not on the AP but the concepts of how the k (Rate law Constant, like the equilibrium constant) is related to temperature.
 
2.  Please watch the Lecture on the derivation of the half – life formulas and lecture on the 
     Activation Energy, Ea.
3. Complete the form below that is based on the 2 lectures.
 
4. Complete a 2 question FRQ (rate law and KSP).
Kinetics (rate law),Ksp Free Response, 2004B, 2009 FRQ .pdf
View Download
Rate Law Multiple Choice Form:
Derivation of half – life formulas:

             

Activation Energy Lecture:

Half Life Activation Energy (Ea) Form:
INTEGRATED CALCULATIONS LECTURE – 2005 HW rate Law problem reviewed:
KSP REVIEW of 2 AP Free response Problems (today after school) – 
End of Week 1 and Rate Law instruction.  2 more days left till the end of the course!