Select Page

Archive – Q2 week 10 – 20 – 21

Week of 1/26 – 1/29
 
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:         A                  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:
 
1/26  –  Tuesday –  “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
 
1/27  –  Wednesday –  “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
 
1/28  – Thursday –  “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
1/29  – Friday –  “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

1/26  –  Tuesday –  “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
The Red Team and the Green Team are remote today. Please move to the Remote Instruction Page.
Period 2, Period 3:
 
 
1: Results of our Graham’s Law of Effusion Demo:
 
2. Kinetic Molecular Theory – Part B – Limitations to the Gas Laws – Real vs. Ideal Student
    A) Van der Waals Equation –  An equation created to “fix” the problems with gas law calculations.
 
                1. Pressure is less than what is calculated for in Real Gases
 
                2. Volume is greater than what is calculated for in Real Gases
Kinetic Molecular Theory Presentation:
 
 
Light Sticks – Rate of Reaction:
 
 
REAL GAS DEMOs/Analogies :
                      –  N2 (l) – boiling point  =  -196 degrees Celsius or 77 Kelvins.
 
                         –  O2 (l) – boiling point =  -183 degrees Celsius or 90 Kelvins.
 
Liquid Oxygen from liquid Nitrogen:

YouTube Video

 
Liquid Oxygen rate of reaction:
 
 
Air horn: Lowering the vapor pressure of liquid in can
Vapor pressure – IF we could see “STEAM”!!
Period 4:
 
1. Lab 17, 18, 19 Error Review – 
 
        a) all Gas Law labs will have conclusions with error analysis – REAL GAS Behavior!
 
        b) Lab 19 – Boyles Law – Values of K
                
                i)  Plot the graph of K
                ii) Plot the values of V and 1/P
1/26  –  Tuesday –  “C” Day – Homework –
 
1.  Please complete the first side of the Gas law worksheet 8 – Van der Waals.pdf worksheet and review with the key.
 
Gas law worksheet 8 – Van der Waals.pdf
 
Gas law worksheet 8 – Van dew Waals Key.pdf
 
2. Red and Blue Team:
 
– Complete conclusions of all Gas Law Labs using limitations of the Real gas behavior in your analysis.
 
Please use the following data to determine the value of K in Lab 19:
 
delete point 11 and continue:
 
Are the values of K deviating more at high and low pressures?  Why or why not?
 
 
 
GAS LAW LABS DUE BY FRIDAY!
 
End of  TUESDAY!
 

 
1/27  –  Wednesday –  “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
 
The Blue team and the Orange team are Remote today. Please move to the Remote Instruction Page.
 
Period 2, Period 4:
 
 1) Wrap up Kinetic Molecular Theory – Van der Waals Equation – slide 29, 30 graphs
 
 2) View demo videos – 
 
        a) Real Gas Behavior – Air horn, condensation of O2, Alaska pipeline
 
3)  Review of Homework
 
Gas law worksheet 8 – Van dew Waals Key.pdf
 
Vapor Pressure presentation that contains Alaska pipeline:

Vapor Pressure 14/15 – Pressure Introduction

IDEAL GASES

– “Ideally”  the gas molecules have  
     insignificant  volume compared to the  
     space they fly in. 
 
– “Ideally” the gas molecules DO NOT have
    intermolecular attraction with each other.

Ideal gas Law formula:
PV = nRT

 

REAL GASES 

–   The gas molecules REALLY have a 
     significant  volume compared to the  
     space they fly in.
 
–  The gas molecules REALLY have intermolecular  
    attractions with each other.
 
                                       Van der Waals equation:
                       P +  an2    x     V – nb  = nRT
                                        V
 
We add to the pressure to solve for the value of the pressure if there WAS NO IMF’s.
 
We subtract to the volume to solve for the value of the volume if the gas does not have any volume.
 
 
Period 3:
1. Lab 17, 18, 19 Error Review – 
 
        a) all Gas Law labs will have conclusions with error analysis – REAL GAS Behavior!
 
        b) Lab 19 – Boyles Law – Values of K
                
 
1/27  –  Wednesday –  “D” Day  Homework:            
 
1. The Orange and Green Team will watch the lecture on the errors on Lab 17, 18, 19 that involve REAL Gas  behavior.
 
 
 
2.  Gas Law Test begins – Make sure you view the lab error video above first!
 
 
You may want to review this question first before you begin the test:
 
Daltons Law Worksheet 2.pdf
View Download
 
Daltons Law Worksheet 2 Key.pdf
View Download
 
Please click on the link below to begin this first portion of the test. All Students will be taking this test at home. 
 
Give yourself a free 25 minute block of time and hit the link below (This form is timed!)
 
 
 
End of Wednesday..

1/28  – Thursday –  “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
 
 
The RED team and the Orange Team are Remote today. Please move to the Remote Instruction Page.
 
Connections:
 
We have for the last 5 months have been on tour through many topics of chemistry (redox, solution, acid/base, etc.) using the mole concept to perform stoichiometry.  Stoichiometry requires a particle and mole concept to predict and calculate the values of our chemical reactions and of course to determine the chemical formulas of our chemicals themselves.  We have been using the macro approach to chemistry as we have been looking at groups (moles) of molecules and formulas (if salts) to using the ratios to answer so many chemical questions.  We have not considered the micro approach yet AND NOW we will.  We will now look at the structure of atoms.
 
Before we begin with Atomic Structure we need a segway!  The first day must connect to the last day!  The connection is very easy.  Historically we studied the development of the particle (atom) theory with the mole theory. Both of these ideas were necessary in order to do any stoichiometry.  REMEMBER that chemistry really only began in the Karlsruhe Congress in 1860 when Stanislao Cannizzaro championed Amedeo Avogadro’s notion that equal volumes of gas at the same pressure and temperature held equal numbers of molecules or atoms, and the notion that equal volumes of gas could be used to calculate atomic weights. 
 
Chemistry began when we USED GASES that we cannot see to determine what the atoms or their arrangements looked like from  Gay- Lussac’ s  whole number volumes when he reacted gases with gases. 
Using Avogadro’s hypothesis ( V = n * K) Cannizzaro was able to for the first time show that stoichiometry can be done for chemical reactions as the molecular formulas of chemicals could be determined!!!  He essentially was able to fill the boxes with what the arrangements of atoms MUST be IF YOU ACCEPT 2 NOTIONS:
 
 1. ATOMS are neither created nor destroyed BUT just rearranged (LAW of Conservation of Mass)
 
 
2.  Equal volumes of 2 (IDEAL GASES) MUST have the same number of molecules if they are  
      under  the same Temperature and Pressure (Avogadro’s Hypothesis!)
 
                                                            WE USED GASES TO DETERMINE ATOMS!
 
                                                             

 

So it only makes sense that we now look more deeply at the particles we discovered through our understanding of gases!
 
So we begin Atomic structure.
 
Period 2, Period 3 – Finished J.J. Thomson and Milliken
 
Period 4: Almost finished JJ Thomson
 
A tour of the Most important atomic structure experiments-  
 
The Class Assignment:
 
You are to complete a form that is posted below for homework by summarizing in your own words the most important atomic structure experiments listed below.  This needs to be specific and complete but still be a summary.  I will walk you through these experiments but you will definitely need to view the resources below to complete the assignment.  I am counting this as the first test of the 3rd quarter.
 
I suggest that you write in a word processing program like word, pages, or a google doc AND cut and paste into the form below.
 
a: J. J. Thomson  : Slide 44 – 52 on presentation below/ MIT Lecture 1 @ 30:40
 
b: Robert Millikan  : Slide 53 – 54 on presentation below
 
c: Earnest Rutherford:  Slide 55 – 60 on presentation below/ MIT lecture 2 below
 
d: H. Moseley  : Slide 61 on the presentation below AND THE LINKS BELOW:
 
 
 
e: James Chadwick : Slide 61 on the presentation below
 
 
MIT lecture 1:  
 
MIT lecture 2: 
 
1/28  – Thursday –  “A” Day Homework:
 
1. Most important Atomic Structure Experiments
We will continue this class assignment of writing detailed summaries of the experiments tomorrow and probably into next week.  The form above is not due until we finish these experiments in class.
2. GAS Law test continues. 
 
You may want to review the following worksheet before you begin this part of the test.
 
Gas Law Stoichiometry Density – 2009.pdf
 
Gas Law Stoichiometry Density – 2009 AP Key.pdf
View Download
 
Give yourself an uninterrupted  15 minutes and click the link below.
 
 
End of Thursday..

1/29  – Friday –  “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
 
The Blue and the Orange team are Remote Today. Please move to the Remote Instruction Page.
 
Period 2:
 
1. We will continue with the atomic structure experiments:
 
        a:  J. J. Thomson  – completed yesterday
        b:  Robert Millikan – completed yesterday
 
         c:  Earnest Rutherford – 
         d:  H. Moseley – 
         e:  James Chadwick
 
 
Period 3, 4
 
        a: a:  J. J. Thomson  – completed yesterday
        b:  Robert Millikan – 
 
         c:  Earnest Rutherford – 
         d:  H. Moseley – 
         e:  James Chadwick
 
1/29  – Friday –  “B” Day Homework:
 
1. You are to complete a form that is posted below for homework by summarizing in your own words the most important atomic structure experiments listed below.  This needs to be specific and complete but still be a summary.  I will walk you through these experiments but you will definitely need to view the resources below to complete the assignment.  I am counting this as the first test of the 3rd quarter.  This will be due Next Wednesday.
 
I suggest that you write in a word processing program like word, pages, or a google doc AND cut and paste into the form below.
 
a: J. J. Thomson  : Slide 44 – 52 on presentation below/ MIT Lecture 1 @ 30:40
 
b: Robert Millikan  : Slide 53 – 54 on presentation below
 
c: Earnest Rutherford:  Slide 55 – 60 on presentation below/ MIT lecture 2 below
 
d: H. Moseley  : Slide 61 on the presentation below AND THE LINKS BELOW:
 
 
 
e: James Chadwick : Slide 61 on the presentation below
 
 
2.   Please continue with the Gas Law Test below:
 
 
Part C – Multiple Choice Questions – 15 minutes
 
https://extendedforms.io/form/929a87e4-7107-4460-8226-63a0c95f9041/login
 
or
 

https://forms.gle/uWiVqoo8pDhuj2Bf9

 
 
Part D – Short response questions on the Van der Waals equation, Daltons law and Graham’s law of Diffusion calculation – 22 minutes
 
or
Part E –  Classic Daltons Law problem, Kinetic theory calculations, gas Stoichiometry
 
 
or
 
 
 
Part F – something like the butane lab
 
 
or
 
 
 
End of quarter 2!
REMOTE INASTRUCTION: