Archive – AP Chem – Q2 – week 4 – 20-21

Archive – Q2 week 4 – 20 – 21

Week of 12/7 – 12/11– 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:

12/7 – 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

12/8 -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

12/9 – Wednesday “A” Day – period 2,3 (Lab) – I 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

12/10 – 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

12/11 – 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

12/7 – 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

The red team and the blue team are remote today. Please move to the Remote Instruction page.

Sorry I need one more day to find my clothes, toothbrush, charger, etc. We are in our house but we do not know where anything is and I am personally exhausted. Actually I am still moving and cleaning old house. I will be back tomorrow,

Period 2, Period 3

Lab 14 will be a lab and a test. You will be graded on how your lab group will design a lab (back titration) to determine the milligrams of aspirin in a single bayer tablet. You will design the lab in the same fashion as I designed the TUMS lab using YOUR arbitrary values that you design.. Last weeks form of Alleve you completed an assignment that was a theoretical lab that determined the milligrams of another active ingredient. You may want to revisit that form or its key. Hint: Both are weak acids.

You will determine the milligrams of aspirin by using 2 tablets of Bayer. Please look at the molecular structures of aspirin below to begin your lab design. Acetylsalicylic acid (aspirin) gets hydrolyzed into 2 components in water.

This is a slow reaction that can be increased by temperature and excess chemical (Le Chateliers principle).

Identification of organic acids can done by Table R in our Regents Chemistry reference tables:

The mechanism for the hydrolysis of aspirin is as follows:

Lab 14 – Aspirin Lab Test Requirements:

a: Using the Google Doc that is shared individually that I have sent, start determining the procedure necessary to determine the amount of aspirin in a Bayer tablet.

USE THE TUMS LAB AS A GUIDE!!!

b: Understanding Lab 13 will help here. You need to figure out what chemicals you need and what their Molarities will need to be to successfully titrate aspirin.

You will need to complete preliminary calculations that will determine the theoretical amount of the other chemicals needed to perform the titration, in the same fashion as we did with Lab 13.

Look at your notes for Lab 11.

c: You will perform the titration and determine the milligrams of the active ingredient per tablet as a lab group in a later date.

d: I will look over your procedure and preliminary calculations and give you the go ahead to

perform the Lab test.

e: In your Shared Lab group Doc, I expect

In this Lab Test I am require the following:

Title Page.

Objective.

materials

a detailed procedure

1) Design of lab – (arbitrary values decided on)

2) Calculations and steps to make certain solutions required in Lab.

3) Steps in the actual lab

Data Table

f) typed calculations page that report the milligrams of aspirin per

Tablet the final result. (DO NOT FORGET ANY CHEMICAL

REACTIONS!)

No Background, Results section or Conclusion necessary!

Period 4 – start the homework

12/7 – Monday – “C” Day Homework:

Connections:

The Balancing of complex Redox equations was a skill that was introduced this summer. We are revisiting redox again! It was introduced early in the year to splash you into the course, using voltaic cells (batteries) and electrolytic cells (electrolysis and electroplating). Now we will focus on redox reactions that are NOT part of a electrochemical cell and these complex reactions will make more sense when we balance them with the college method. This method still works for our simple half reactions that we saw in September but will provide more insight on their structure. Most of these complex redox reactions require an acidic or basic environment so it makes sense that I reintroduce them now, after we have studied acid/base concepts.

Most chemical reactions are redox in nature and I want To Do more stoichiometry Labs with redox in the analytical chemistry section of the course.

When you think about it most chemical reactions are either redox, acid/base, or precipitation reactions and through our work together we have studied all three since September.

Redox:

3 Mn⁺² (aq) + CrO₇^-2 (aq) + 2H⁺(aq) —–> 3MnO₂ (s) + 2Cr⁺³ (aq) + H₂O (l)

precipitate

Acid Base:

NH₃ (aq) + CO₂ (aq) + H₂O (l) —-> HCO₃^-1(aq) + NH₄⁺ (aq)

base acid base

Precipitation Reaction:

Ca⁺² (aq) + CO₃^-2(aq) —–> CaCO₃ (s)

precipitate

Now most reactions are one of these three types but as you can see above sometimes these reactions are a combination of each other. Notice that in the Redox reaction we have protons H⁺ (acid/base) and in the example above a precipitate ( MnO₂ (s) ) is made. Redox reactions can also occur in Basic conditions as well.

Your homework will include balancing redox reactions in acidic and basic solutions. Why? Remember that protons produced by acids will pull electrons from chemical species that will spontaneously lose (oxidize) or AND hydroxides produced by bases will push its electrons onto chemical species that will spontaneously accept (reduce) them. The acid/base component of the complex redox equation that we will balance tonight is required to drive these reactions to completion. In order to use stoichiometry we need reactions to be driven forward till the limiting reactant runs out! We need to stay way from equilibrium!

ALSO the first 2 steps of the hydrolysis of aspirin is actually a redox reaction catalyzed by the presence of a the hydroxide ion!!!! Protons (H⁺) also catalyze these complex redox reactions and so we will learn (review from the summer) how to balance these advanced redox reactions in the presence of Acid or Base!!

1. Please read the connections above.

2. Please complete side 1 and 2 (questions 1 – 5) of the Redox 3 balancing redox equations.pdf worksheet and review with the key.

3. You will need to view the How to balance redox reaction in acid environment (College version) lecture for reactions 1 – 3 and How to balance redox reaction in basic environment for question 4.

Please use the key below to help review the homework, especially reaction 5.

Notes on how to balance complex reactions in acidic and basic solutions:

Redox – Balance complex reactions notes.pdf
View Download

Redox 3 balancing redox equations.pdf
View Download

Redox 3 balancing redox equations key.pdf
View Download

How to balance redox reaction in acid environment (College version) Lecture:

Questions 1 – 3 reviewed.

How to balance redox reaction in basic environment (College version) Lecture:

Question 4 reviewed.

End of Monday..

12/8 -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

The the BLUE Team and the ORANGE Team are remote today. Please move to the Remote Instruction Page.

Period 2, Period 4:

1. Lets discuss the chemical reactions that occur with aspirin (salicylic acid).

a) Hydrolysis with water – Redox (in a basic solution):

b) Acid/Base Reactions –

Here is a summary of the reactions that I will use to explain the chemistry.

What does aspirin do? It block the productions of prostaglandins. It is another example of NSAIDS.

2. Lab 14 – test 5 – Design help-

First lets review last weeks form – Alleve:

Volumetric Titration Practice Aleve TEST Key p.pdf
View Download

a) Type of titration

b) arbitrary values

c) Solutions –

Period 4:

1. Begin the Lab 14

12/8 -Tuesday- “D” Day Homework:

1. Be ready to begin Lab 14 – making solutions, running lab. I will not help. Only lab assistant Ben will here!

2: Please complete the Redox 4 – Net potentials Demonstrations worksheet 1213.pdf worksheet and use the key to review.

Redox 4 – Net potentials Demonstrations worksheet 1213.pdf
View Download

Redox 4 – Net potentials Demonstrations worksheet 1213 key p.pdf
View Download

End of Tuesday.

12/9 – Wednesday “A” Day – period 2,3 (Lab) – I 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 Green team are Remote Today. Please move to the Remote Instruction Page.

Period 2, Period 4 –

1. Perform the Aspirin Lab Part 1

a) Making the NaOH strong base solution.

b) Making the KHP solution.

c) Standardize the Base.

d) label your NaOH solution and stopper to set aside for the next lab period.

Period 3

2. Design of the Aspirin Lab Part 2:

a) Calculate the Strong Acid (HCl) Molarity needed to back titrate.

b) Make the solution from a stock solution using the dilution formula: MV = MV

Next In class period you will:

1. Crush the tablets of Bayer aspirin.

2. add some distilled water.

3. Heat till hot for several minutes.

4. Add excess strong base solution the was made and standardized in part 1.

5. Back titrate with excess Strong acid solution with indicator or pH probes.

12/9 – Wednesday “A” Day – Homework-

1. Start the Motrin Volumetric Test – Due Friday Morning

This is a take home test using the worksheet below. Please show all work on this worksheet. I may ask you to hand it in as it may be able to give you partial credit. There will be a form posted tomorrow night to input your answers. You will have ONLY 2 graded submissions so make them count!

This is a test and it VERY similar BUT not quite the same as the aspirin lab you are designing and completing.

Motrin Volumetric Test Link (click me!)

2. Complete the Part 2 design of your ASPIRIN Lab with the video below (for the Orange and Green teams) using the video below:

There will be no more help. Only Lab Assistant Ben!

Design of the Aspirin Lab Video:

End of Wednesday..

12/10 – 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

The Blue Team and the Orange Team are Remote Today. Please move to the Remote Instruction page.

Period 2:

1. Perform the Aspirin Lab Part 1

a) Making the NaOH strong base solution.

b) Making the KHP solution.

c) Standardize the Base.

d) label your NaOH solution and stopper to set aside for the next lab period.

e) If time permits – make the HCl solution.

Part 2 – Monday..

Period 3,4 (LAB)

1. Perform the Aspirin Lab Part 1

a) Making the NaOH strong base solution.

b) Making the KHP solution.

c) Standardize the Base.

d) label your NaOH solution and stopper to set aside for the next lab period.

e) If time permits – make the HCl solution.

2. Perform the Aspirin Lab Part 2.

a) Make the HCl solution needed to back titrate

b) crush the aspirin tab(s)

c) Add distilled water and heat solution for 10 minutes.

d) Add your base solution (in excess).

e) stir using the stirring bar and the magnetic stirrer for a few minutes. Solution should still be warm.

f) Back titrate with HCl solution. Make sure you rinse the buret with HCl as it had a base in it previously!

e) calculate the milligrams of aspirin in your tabs!

Part 1 of the Aspirin Lab:

Part 2 of the Aspirin Lab:

12/10 – Thursday “B” Day Homework-

1. Complete the Motrin Volumetric Test – Due Friday Morning

This is a take home test using the worksheet below. Please show all work on this worksheet. I may ask you to hand it in as it may provide you with partial credit.

Please complete the form below to input your answers to the Motrin Volumetric Test.

You will have ONLY 2 graded submissions so make them count!

You may work together but every individual must complete the form themselves.

Motrin Volumetric Test Form:

Motrin Volumetric Test – 2021

End of Thursday..

12/11 – 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

The Red Team and the Green Team are remote today. Please move to the Remote Instruction Page.

Period 2:

Perform the Aspirin Lab Part 2.

a) Make the HCl solution needed to back titrate

b) crush the aspirin tab(s)

c) Add distilled water and heat solution for 10 minutes.

d) Add your base solution (in excess).

e) stir using the stirring bar and the magnetic stirrer for a few minutes. Solution should still be warm.

f) Back titrate with HCl solution. Make sure you rinse the buret with HCl as it had a base in it previously!

e) calculate the milligrams of aspirin in your tabs!

Period 3, 4

Some might need to redo Part 1 – you have the time today to do so if needed.

Perform the Aspirin Lab Part 2.

a) Make the HCl solution needed to back titrate

b) crush the aspirin tab(s)

c) Add distilled water and heat solution for 10 minutes.

d) Add your base solution (in excess).

e) stir using the stirring bar and the magnetic stirrer for a few minutes. Solution should still be warm.

f) Back titrate with HCl solution. Make sure you rinse the buret with HCl as it had a base in it previously!

e) calculate the milligrams of aspirin in your tabs!

12/11 – Friday – “C” Day Homework –

1. Complete the Aspirin Lab 14 – Please follow the directions and complete it on the shared doc that I gave.

The following teams should have this done by Monday 12/14:

The Green Team

The Blue Team

The Orange Team

The RED Team will complete the data collection Monday and it will be due Next Tuesday..

End of week 4!

Remote Instruction:

2/7 – 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

The red team and the green team is remote today.

Period 2, Period 3

This is a slow reaction that can be increased by temperature and excess chemical (Le Chateliers principle).

Identification of organic acids can done by Table R in our Regents Chemistry reference tables:

The mechanism for the hydrolysis of aspirin is as follows:

Lab 14 – Aspirin Lab Test Requirements:

a: Using the Google Doc that is shared individually that I have sent, start determining the procedure necessary to determine the amount of aspirin in a Bayer tablet.

USE THE TUMS LAB AS A GUIDE!!!

b: Understanding Lab 13 will help here. You need to figure out what chemicals you need and what their Molarities will need to be to successfully titrate aspirin.

You will need to complete preliminary calculations that will determine the theoretical amount of the other chemicals needed to perform the titration, in the same fashion as we did with Lab 13.

Look at your notes for Lab 11.

c: You will perform the titration and determine the milligrams of the active ingredient per tablet as a lab group in a later date.

d: I will look over your procedure and preliminary calculations and give you the go ahead to

perform the Lab test.

e: In your Shared Lab group Doc, I expect

In this Lab Test I am require the following:

Title Page.

Objective.

materials

a detailed procedure

1) Design of lab – (arbitrary values decided on)

2) Calculations and steps to make certain solutions required in Lab.

3) Steps in the actual lab

Data Table

f) typed calculations page that report the milligrams of aspirin per

Tablet the final result. (DO NOT FORGET ANY CHEMICAL

REACTIONS!)

No Background, Results section or Conclusion necessary!

Period 4 – start the homework

12/8 -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

The the BLUE Team and the ORANGE Team are remote today.

Zoom Stream info: I am back!

Topic: AP Chemistry 12.08 – Periods 2,3,4

Time: Dec 8, 2020 08:00 AM Eastern Time (US and Canada)

Join Zoom Meeting

https://us02web.zoom.us/j/85018541009?pwd=TXp4ejNuS2ZBempiM1VTbWNWVXdMQT09

Meeting ID: 850 1854 1009

Passcode: bdVgM3

One tap mobile

+16465588656,,85018541009#,,,,,,0#,,314550# US (New York)

Period 2, Period 4:

1. Lets discuss the chemical reactions that occur with aspirin (salicylic acid).

a) Hydrolysis with water – Redox (in a basic solution):

b) Acid/Base Reactions –

Here is a summary of the reactions that I will use to explain the chemistry.

What does aspirin do? It block the productions of prostaglandins. It is another example of NSAIDS.

2. Lab 14 – test 5 – Design help-

First lets review last weeks form – Alleve:

Volumetric Titration Practice Aleve TEST Key p.pdf
View Download

a) Type of titration

b) arbitrary values

c) Solutions –

Period 4 – Please start the homework.

12/9 – Wednesday “A” Day – period 2,3 (Lab) – I 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 Green team are Remote Today.

Zoom Stream info:

Topic: AP Chemistry – 12.09 – Period 2, 3, and 4

Time: Dec 9, 2020 08:00 AM Eastern Time (US and Canada)

Join Zoom Meeting

https://us02web.zoom.us/j/88569702634?pwd=QmNCSXc1eGNGcUM0bElVQW1meXBIZz09

Meeting ID: 885 6970 2634

Passcode: YR4wth

One tap mobile

+16465588656,,88569702634#,,,,,,0#,,608494# US (New York)

Period 2, Period 4 –

The Blue and Orange Team will perform part 1 of the lab. Remote students can start the homework. Please tune back in period 3 if you are a Full Remote or Blue Team.

Green Team in period 4 only has 1 period will need to watch the lecture posted later for homework and can also start the homework.

Period 3-

2. Design of the Aspirin Lab Part 2:

a) Calculate the Strong Acid (HCl) Molarity needed to back titrate.

b) Make the solution from a stock solution using the dilution formula: MV = MV

Next In class period you will:

1. Crush the tablets of Bayer aspirin.

2. add some distilled water.

3. Heat till hot for several minutes.

4. Add excess strong base solution the was made and standardized in part 1.

5. Back titrate with excess Strong acid solution with indicator or pH probes.

Please move to the week 4 page for the homework.

12/10 – 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

The Blue Team and the Orange Team are Remote Today.

Zoom Stream info:

Topic: AP Chemistry – 12.10 = periods 2,3,4

Time: Dec 10, 2020 08:00 AM Eastern Time (US and Canada)

Join Zoom Meeting

https://us02web.zoom.us/j/89860178973?pwd=MmNTVE5BUSt2dmZ0Z1hneUM2WkwyZz09

Meeting ID: 898 6017 8973

Passcode: xraT97

One tap mobile

+16465588656,,89860178973#,,,,,,0#,,408327# US (New York)

Period 2:

The RED team will be completing Part 1 – The Blue team completed this part yesterday.

The RED team will complete part 2 tomorrow. Be ready for part 2.

I posted a video on making the HCl solution last evening.

I will stream a lab group for the FULL REMOTE STUDENTS.

1. Perform the Aspirin Lab Part 1

a) Making the NaOH strong base solution.

b) Making the KHP solution.

c) Standardize the Base.

d) label your NaOH solution and stopper to set aside for the next lab period.

e) If time permits – make the HCl solution.

Period 3,4 (LAB) – The Green team will running part 1 and part 2 of the Lab. You guys will complete the lab tomorrow. Be ready for part 2 tomorrow.

You can work on the homework.

I will stream a lab group for the FULL REMOTE STUDENTS.

1. Perform the Aspirin Lab Part 1

a) Making the NaOH strong base solution.

b) Making the KHP solution.

c) Standardize the Base.

d) label your NaOH solution and stopper to set aside for the next lab period.

e) If time permits – make the HCl solution.

2. Perform the Aspirin Lab Part 2.

a) Make the HCl solution needed to back titrate

b) crush the aspirin tab(s)

c) Add distilled water and heat solution for 10 minutes.

d) Add your base solution (in excess).

e) stir using the stirring bar and the magnetic stirrer for a few minutes. Solution should still be warm.

f) Back titrate with HCl solution. Make sure you rinse the buret with HCl as it had a base in it previously!

e) calculate the milligrams of aspirin in your tabs!

FULL REMOTE STUDENTS – if you did not watch today’s stream I have uploaded today’s stream of the lab.

Part 1 –

Part 2 –

12/11 – 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

The Red Team and the Green Team are remote today.

Zoom Stream info:

Topic: AP Chemistry 12.11 – Periods 2,3,4

Time: Dec 11, 2020 08:00 AM Eastern Time (US and Canada)

Join Zoom Meeting

https://us02web.zoom.us/j/85641117630?pwd=OFFTWjEvelp3WFZOR2FjdWk2eGt1Zz09

Meeting ID: 856 4111 7630

Passcode: 25EmQJ

One tap mobile

+16465588656,,85641117630#,,,,,,0#,,636330# US (New York)

Period 2, Period 3,: The Blue team will be completing the Lab that you will completing Monday.

Please watch the following lecture:

Notice the net potential table is listed backwards from what we have used. It is done this way to list the reactivity of metals that a very terrible REGENTS Chemistry Table uses. TABLE J!

Period 4 The Orange team will be completing the Lab that you completed yesterday. You should be working to complete it in the shared doc.