Archive – week 4 – 20 – 21
Week of 9/29 – 10/2
The 4 day – A, B, C, D cycle looks like this: And Tuesday starts on an C day!
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
Tuesday: 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 week’s 4 day Schedule:
9/28 – Monday – off – Yom Kippur
9/29 – 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
9/30 – 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
10/1 – Thursday “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
10/2 – 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
9/29 – 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
RED Team and Green Team are in Remote Today. Please move to the Remote page.
period 2, period 3: (Single classes)
1. Lab 1 – return/graded
2. Electrolysis of water Demo and Notes Review – Quick review of the assigned problems
3. Lab 2
a) – implications of the electrolysis of water.
b) – Hints at potential problems in STEM lab
Daniell Cell Demo 2 – Time Lapse – Helpful for Lab 2:
Mr. Grodski Possible solutions to Lab 2:
4. Potato Battery – Maybe
period 4 Lab:
Lab 3 : Determining the grams of copper from electrolysis –
Measure the mass of your filter paper and Copper – Data Collection
Calculate grams of experimental copper.
Calculate percent Error.
Lab 3 – Electrolysis of CuCl2.pdf
Today’s Demo: (electrolysis of water)
Another explanation a few years ago..
Today’s Class Lecture:
9/29 – Tuesday – Homework –Surprise Quiz on Electrolytic Cells Thursday
1. We will have a quiz that will encompass both the voltaic and electrolytic cell on THURSDAY.
Tonight you will take an extra credit Form that will provide EXTRA POINTS for the quiz.
There will be no makeup. It is time to start putting this together and asking directed questions on points you do not understand. If you are sitting back and being pedestrian in this process it will not work for you.
Please use the following worksheet posted for the EXTRA Credit form posted below:
Extra Credit Form: IT IS NOT ON AUTO-REPLY – You have one submission for this form and I will grade and send you your answers tomorrow morning.
About the Microbial Electrolytic Cell in the Form above:
Natural gas has a dominant role in our energy supply. However, most of our natural gas is of fossil origin and therefore it is of utmost importance to have a renewable source of natural gas. Currently, the only renewable alternative to natural gas of fossil origin is to produce natural gas from biomass, e.g. organic waste, and crops. This alternative is of limited use, however, as land, water, and fertilizer, needed to produce the required biomass, are scarce and its use may not compete with food production. Here we propose a new technology that is capable of converting (excess) electricity and CO2 into methane (CH4), the main component of natural gas.
The points given back on the last electrolytic cell quiz will be determined the following:
| Raw score | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 |
| *Bonus Points | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
*So you need to get at least 4 correct answers (out of 13) to get 1 Bonus Point. If you got 13/13 you earned the max point = 10 points.
*If you do not need these point for the electrolytic cell quiz then you can keep them for another quiz.
End of Tuesday!
9/30 – 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
Blue Team andOrangeteam are remote today. Please move to the Remote Instruction Page.
period 2,3 (Lab):
Lab 3 : Determining the grams of copper from electrolysis
– Mass of Cu deposited on cathode measured = experimental value
– Theoretical mass of Cu from average amperage calculated
– percent error
– Determination of the Molarity (assuming if the reaction went to completion).
– Errors
period 4:
Lab 3 : Determining the grams of copper from electrolysis
– Mass of Cu deposited on cathode measured = experimental value
– Theoretical mass of Cu from average amperage calculated
– percent error
– Determination of the Molarity (assuming if the reaction went to completion).
– Errors
9/30 – Wednesday – “D” Day Homework: Study for surprise quiz tomorrow 🙂
1. Complete the Conclusion for Lab 2 – Due this Friday
Please complete Lab 2 – Voltaic cell STEM Lab –
You should have completed the a) TITLE PAGE – with names of people you are working with
b) Objectives Page –
c) Design Page – Completed diagram of battery
d) Reasoning – describe why you used the particular materials
e) RESULTS – Add the picture posted from Friday
Also add a percent error calculation
f) Conclusion – Explain with detail why your design did not live up
to your expectations.
Look for the resources to review LAB 2 in Tuesday above.
Class lecture (start at 20:30) : https://youtu.be/Gkk0-MF7LoU
2. Study for the electrolytic quiz (with voltaic!)
PLEASE REVIEW the Electrolytic EXTRA CREDIT Quiz! I have sent out your grades and a link to the key to that form which is extra credit for tomorrows quiz.
The important worksheets in review:
With Voltaic/galvanic
Links to my demos explained:
End of Wednesday!
10/1 – Thursday “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 on REMOTE Instruction Today.
period 2 (Lab): We will collect data for the Lab 3 in the first period before the quiz in the second period.
1. Lab 3 : Determining the grams of copper from electrolysis
– Mass of Cu deposited on cathode measured = experimental value
– Theoretical mass of Cu from average amperage calculated
– percent error
– Determination of the Molarity (assuming if the reaction went to completion).
– Errors
period 3:
1. Voltaic Cell and Electrolytic Cell Quiz –
period 4:
1. Voltaic Cell and Electrolytic Cell Quiz –
10/1 – Thursday “A” Day Homework –
1. Please review the electrolytic cell quiz with the class lecture below:
2. Please watch the flash animation from the Link Below (UNIT CELL TUTORIAL) and do the questions at the end of the tutorial. (they provide answers and solutions). This tutorial will be very helpful for tomorrow’s Lab activity.
Lattice Arrangement – Cubic cells.pdf (this is a hard copy of the form which was given out today)
View Download
View Download
Click on the link and click on the UNIT Cell Tutorial.
Please Use FIREFOX or Chrome. Safari may have issues!
You might need the login:
grodskib@whbschools.org
Lexington1
If you cannot access the clickable presentation please view the video I made of me going through the presentation.
I posted it below the Form.
3: Please complete the form below based on the UNIT Cell Tutorial in step 1.
You will have 2 submissions.
Please use this video to complete the Lattice Energy Form if you could not connect to the tutorial above:
The First bendable battery – For fun!
10/2 – 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
Blue and Orange Team are on Remote Today. Please move to the Remote Instruction Page.
period 2, period 3:
1. Electrolytic Quiz- Review video posted, Give back quizzes.
2. Last nights form – Review
DiFFraction of light demo – double slit experiment = green laser
Constructive and destructive interference patterns
These patterns can be observed to measure the distance of the 2 slits or the distance between openings in a crystal.
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The following is an example of an interference pattern that occurred during today’s demo. This is the famous double slit experiment that proves light has wave properties. I pointed a green laser at a card that had 2 small double slits. The bright spots are the constructive interference while the space between the dots are destructive interference. Based on some measured values and Bragg’s Law we can calculate the distance between the slits that the light passed through AND this is what is done to measure the distance of the lattice constant from metal crystals in x-ray crystallography. |
green laser
Passivity connections
Alloy – stainless steel
3: Start the classwork worksheet – Calculations of Close Cubic Packing Structures.pdf
Classwork:
Class movie:
-period 4 (LAB):
1. Begin Metal Foil Lab –
Discussed the volume unit relatives cm3 = ml and the conversions of m3 to cm3
metric prefixes: K H D [ ] d c m —–> micro, nano, pico
Conversion large number = small unit —–> small number = large unit
Lab 4 – Metal foil lab
The metal foil lab activity is not a formal writeup but please complete it as per the procedure in the handout that I gave. A piece of paper with your work neatly written with units and sig figs showing all calculations will suffice.
This site might be very helpful in your completion of the lab.
Metal foil Lab:
Today’s Period 2/3 Class lecture:
10/2 – Friday “B” Day – Homework
1: Please complete the Alloy worksheet.pdf worksheet and review with the key.
Alloy worksheet key.pdf
2: Please complete the Crystalline Unit Cell Problems.pdfand review with the key.
I have posted a video below on this worksheet if needed.
Period 2 students please complete all questions.
Period 4 students please do all questions EXCEPT QUESTION 2!
*Be for-warned that in my video FOR QUESTION 2, I did not have my calculator in degrees so my final answer to 2 is a bit off because I have the sin 45 to be .8509 when it should be .707. The handwritten key is correct. IN spite of me you can learn!
My key below is correct for question 2.
2: Study for TEST 1 – Later next week – I want to complete Lab 4 first.
Test 1 topics: –
Please go back the appropriate worksheets, keys,and lectures in the past 3 weeks to review the following concepts
1. Coloumbs Law:
No calculations with the formula but you should be aware how it applies to atoms ability to oxidize or reduce, solubility (why some ionic solids will dissolve in water while others do not or preciptate).
2. Voltaic Cell/galvanic cell
diagram, determining anode, cathode, charges, flow of electrons, salt bridge flow of ions, E0 calculation, use of reduction potential table, writing balanced half reactions and overall reactions, predicting the voltage change when concentrations change (Le Chateliers Principle), molarity (M), predicting precipitates that would lower the molarity of certain ions when they become solids, voltage vs current. Spontaneity and equilibrium, The U diagram.
3: Electrolytic Cell –
diagram and label all parts with flow of charge from a power source. Predict the products at each anode. Calculating the moles, molarity, or grams of the products using total time, amperage and Faradays constant.
Determining E0 cell, half reactions, overall reaction, spontaneity,
4: Unit Cell and alloys
basics of interstitial and substitutional alloys, calculations using density, lattice constant and atomic radii with FCC or BCC. Conversions, and use of avogodros number.
There is no need to memorize the conversion factors (pm, nm) or what the FCC or BCC looks like but you should be able to figure out how many atom exist in each FCC or BCC. You should be able to complete all conversions of all the worksheet and Lab (4).
5. Review your 2 graded quizzes. They keys are posted in the powerschool. I have posted some blank quizzes
*If you cannot print from your school computer, use your phone or another computer.
*If you cannot print from your school computer, use your phone or another computer.
End of week 4..
NOT UPDATED beyond this point
REMOTE
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9/29 – 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
RED Team and Green Team are in Remote Today.
I will attempt a Zoom Stream today. If the Stream fails I will post a video of the class later today.
Mr. Grodski is inviting you to a scheduled Zoom meeting.
Topic: AP Chemistry – 9/29 – Electrolysis and Voltaic Cells
Time: Sep 29, 2020 08:00 AM Eastern Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/86393424949?pwd=RHdYSkIrYXVKSlFUMDlLT2daWGJLQT09
Meeting ID: 863 9342 4949
Passcode: D2W1JC
One tap mobile
+16465588656,,86393424949#,,,,,,0#,,976491# US (New York)
period 2, period 3: (Single classes)
I will quickly review the Electrolysis of water in class and the worksheets that have already been assigned.
1. Electrolysis of water Demo and Notes Review – Quick review of the assigned problems
I will review my solutions and thoughts and how I navigated the Lab 2 to win the contest. My battery had about 1.4 volts!
Please view my written solutions with video that has no audio below it to show my victory! If you had trouble explaining your outcome
in Lab 2 these notes and hints will help!
2. Lab 2 – Please READ my Voltaic cell Lab 2 – Grodski Hints.pdf below and watch my
Mr. Grodski Possible solutions video.
a) – implications of the electrolysis of water.
b) – Hints at potential problems in STEM lab
Daniell Cell Demo 2 – Time Lapse – Helpful for Lab 2:
Mr. Grodski Possible solutions to Lab 2:
4. Potato Battery – Maybe
period 4 Lab:
Lab 3 : Determining the grams of copper from electrolysis –
Measure the mass of your filter paper and Copper – Data Collection
Calculate grams of experimental copper.
Calculate percent Error.
Lab 3 – Electrolysis of CuCl2.pdf
Today’s Demo: (electrolysis of water)
Another explanation a few years ago..
Please view Week 4 for the homework!
9/30 – 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
Blue Team and Orange Team are remote Today.
The other classes today are completing the first part of Lab 3 – Electrolysis of copper (II) Chloride.
The Orange Team yesterday completed the first part of the lab.
The Blue Team will complete the first part of Lab 3 tomorrow.
I will not be doing a live teaching lesson today, thus there will be no Zoom STREAM today.
Blue Team:
1. Please complete Lab 2 – Voltaic cell STEM Lab –
You should have completed the a) TITLE PAGE – with names of people you are working with
b) Objectives Page –
c) Design Page – Completed diagram of battery
d) Reasoning – describe why you used the particular materials
e) RESULTS – Add the picture posted from Friday
Also add a percent error calculation
f) Conclusion – Explain with detail why your design did not live up
to your expectations.
Use the following resources to complete your conclusion:
Yesterday’s Class lecture: (start at 21:30)
Orange Team –
Please continue with Lab 3 calculations:
Yesterday you collected solid Cu from one of your electrodes.
– You measured the mass of your dry filter paper.
– I placed your sample in an oven to evaporate the water and dry your Cu and filter paper.
– I took your samples out of the oven and massed your Cu this morning.
Please use the pics of your measured samples to continue and compete the Lab:
The value below represent the experimental mass of the dry filter paper and Cu: #9 in your lab data
1. Complete #9 – #13 of the data section.
Under number 10 please show your work to complete the calculation of what mass you should expect at the cathode given YOUR TIME that the experiment ran and the average amperage that you kept the experiment.
You are starting with seconds ——> Coulombs —–> moles of electrons ——-> moles of Cu ——-> grams Cu
amps. Farady half reaction atomic
mass
This grams Cu represents YOUR theoretical value as if there was no errors! Put this value in number 11!
Calculate the percent error: experimental value – Theoretical value x 100 = percent error
Theoretical value
Using part of the calculation under number 10 please calculate the Molarity of the concentration of Cu+2 ions.
You need to solve for moles!!! (moles of Cu)
Remember that Molarity = moles of Cu (or Cu+2 ) / Liter of solution. Everyone had 100 ml of solution.
– We are assuming that we ran the experiment to completion.
We have completed all of these calculations before in all of the homework’s that were assigned. Review them if you need help with the calculations.
You can start the conclusion- ERROR ANALYSIS!!!!
The Lab is not due until I review it in class.
Please view your homework in the week 4 page!
10/1 – Thursday “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
GAVIN, SAMANTHA, VICTOR SEE BELOW:
The RED Team and the GREEN team are on REMOTE Instruction Today.
period 2 (Lab): Students in class will be doing Lab 3 – collection of data just like what the Red team did
yesterday in class.
RED TEAM: Make sure you have competed all parts of the Lab except for the conclusion
Period 3: We will take the Electrolytic Voltaic Cell quiz REMOTELY
Period 3: We will take the Electrolytic Voltaic Cell quiz REMOTELY
I have sent you a google doc to upload your work into like we did a couple of weeks ago when we were on full remote. YOU MUST USE THE GOOGLE DOC THAT I LINKED YOU as I CANNOT chase 28 different emails to collect and grade. I am working as hard as I can and if you do not do as I ask you are making me work even harder.
TO GAIN ACCESS TO THE GOOGLE DOC, YOU MUST BE LOGGED INTO GOOGLE WITH YOUR PRIVATE EMAIL!
– Please print and write on the quiz or use a separate piece of paper and write out the answers. THEN take a picture of your work and upload it on the google doc that I linked to you.
You will not have access to the quiz link until on or about 9:00 am.
We will have a zoom stream AT Period 3 (9:00 am) for both RED and Green REMOTE teams.
ZOOM STREAM Info:
Topic: AP Chemistry 10/1 – Electrolytic Cell Quiz
Time: Oct 1, 2020 09:00 AM Eastern Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/89052953715?pwd=Q3RUNVF3MUtxRWY3S0IxRjNuRXo1Zz09
Meeting ID: 890 5295 3715
Passcode: W20u9y
One tap mobile
+16465588656,,89052953715#,,,,,,0#,,644262# US (New York)
period 4: Green Team:
Please use the data below to complete your lab. You should have already competed the Theoretical calculations for the mass of the copper and Molarity of the copper. With the mass of filter paper and copper below, you can now complete the percent error (once you subtract the mass of the filter paper).
Make sure everything is complete in the lab except the conclusion.
GAVIN, SAMANTHA, VICTOR SEE BELOW:
Please go to the Week 4 page to view the Homework.
10/2 – 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
Blue team and Orange team are REMOTE today:
PERIOD 2, 3: (individual class lesson) – same lesson period 2, period 3
We will have a Live Zoom Stream today during period 2:
I will record Period 3
LIVE Zoom Link:
Topic: AP Chemistry – 10/2
Time: Oct 2, 2020 08:00 AM Eastern Time (US and Canada)
Join Zoom Meeting
https://us02web.zoom.us/j/85028664857?pwd=Y3JyQmlCRTdxb2F6elFpc3RyTzd1Zz09
Meeting ID: 850 2866 4857
Passcode: pLcpW6
One tap mobile
+16465588656,,85028664857#,,,,,,0#,,442273# US (New York)
1. Electrolytic Quiz- Review video posted, Give back quizzes.
2. Last nights form – Review
DiFFraction of light demo – double slit experiment = green laser
Constructive and destructive interference patterns
These patterns can be observed to measure the distance of the 2 slits or the distance between openings in a crystal.
green laser
green laser
Passivity connections
Alloy – stainless steel
3: Start the classwork worksheet – Calculations of Close Cubic Packing Structures.pdf
Classwork:
Please view week for this weekend’s homework
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