Archive – Q2 week 4 – 20 – 21



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Title Page.
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Objective.
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materials
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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
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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
How to balance redox reaction in acid environment (College version) Lecture:
How to balance redox reaction in basic environment (College version) Lecture:


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.
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:
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
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:
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.
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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.
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