Q1 : Week 3 – 9/18 – 9/22
<- Week 2 – Week 4 -> Jump to: Tuesday, Wednesday, Thursday, Friday
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Please Make sure Your read all instructions for all assignments.
LAB 1 – Gerber Voltaic Cell is DUE!!!!!
LAB 2 – Voltaic Cell design is due Tuesday 9/26
______________________________________________________ Jump to: Monday Homework 9/18 – Monday – A Day – 2/3a Lab, 4
Main focus –
a) To identify the voltage change in a voltaic cell due to Le Chatelier’s Principle with changes in the concentrations of ions in half cells, specifically in a concentration cell
Voltaic Cell quiz 1 key.pdf View Download
1. Review of Homework released questions – Does the anode always get oxidized?
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Period 3a:
1. Conclusion writing – Lab 1
2. Lab 2 intro/explanation
Today’s Demo – What if I create voltaic cell with the same electrodes (Cu) and the same concentration of Copper ions?
Today’s lesson on the concentration cell:.
__________________________________________________ Lab 1 – The Gerber Voltaic Cell
Conclusion Writing:
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Review of the Lab 1 that might help with conclusion:
Gerber Voltaic Cell Time Lapse: I use this to review conclusion questions.
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9/18 – Monday’s Homework: –
1. Please work on finishing Lab 1 – DUE Wednesday 9/20 in the purple crate in front of the class. I did post a video review of the lab if you still need more help in the error analysis of the conclusion.
3. Complete the form below on battery in your car (lead acid) UNLESS

How It Works
Let me give you the big picture first for those who aren’t very detail oriented. Basically, when a battery is being discharged, the sulfuric acid in the electrolyte is being depleted so that the electrolyte more closely resembles water. At the same time, sulfate from the acid is coating the plates and reducing the surface area over which the chemical reaction can take place. Charging reverses the process, driving the sulfate back into the acid. That’s it in a nutshell, but read on for a better understanding. If you’ve already run from the room screaming and pulling your hair, don’t worry.
The electrolyte (sulfuric acid and water) contains charged ions of sulfate and hydrogen. The sulfate ions are negatively charged, and the hydrogen ions have a positive charge. Here’s what happens when you turn on a load (headlight, starter, etc). The sulfate ions move to the negative plates and give up their negative charge. The remaining sulfate combines with the active material on the plates to form lead sulfate. This reduces the strength of the electrolyte, and the sulfate on the plates acts as an electrical insulator. The excess electrons flow out the negative side of the battery, through the electrical device, and back to the positive side of the battery. At the positive battery terminal, the electrons rush back in and are accepted by the positive plates. The oxygen in the active material (lead dioxide) reacts with the hydrogen ions to form water, and the lead reacts with the sulfuric acid to form lead sulfate.
The ions moving around in the electrolyte are what create the current flow, but as the cell becomes discharged, the number of ions in the electrolyte decreases and the area of active material available to accept them also decreases because it’s becoming coated with sulfate. Remember, the chemical reaction takes place in the pores on the active material that’s bonded to the plates.
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Lead Acid Battery Presentation :
Lead Acid Battery Animation :
Lead Acid Battery Tutorial :
Jump to: Tuesday Homework / top
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9/19 – Tuesday – B Day – 2/3b Lab, 4
a) To Review the Lead Acid Battery
HSO4–(aq) + Pb (s) —> PbSO4(s) + H+(aq) + 2e– E0 = + .35 V ______________________________________________________________
PbO2(s) + 2HSO4–(aq) + 2H+(aq) + Pb (s) —> 2PbSO4(s) + 2H2O (l) +2.04 V


2. Lab 2 design – Complete your design and begin presentation in YOUR Google Slide that was linked to you in your School email account.
a) Complete slides 1 – 4 : See the Lab 2 requirements below.
– Tomorrow we will run the lab and see you has the POWER (high power to mass ratio! We are looking for the highest average volts
Period 3b:
2. Complete slides 1 – 4 in your presentation.
LAB 2 – design a voltaic cell with greatest voltage– modest breakfast up for grabs
This Lab write-up is NOT a group slide-up. There is one presentation for every individual.ab group. I have emailed everyone with their individual link.
You need to present on the slides in the Presentation the following:
1. Title page with all Lab partners listed.
2. Objectives.
3. Materials Page listed with all available components
4. Labeled Diagram Slide of proposed voltaic cell design – Draw a diagram with your phone
______________________________________________________ Jump to: top 9/19 – Tuesday Homework: –
1: How Alkaline Batteries are made :
Alkaline Battery Animation :
In the Alkaline Battery:
Inner half Cell:
ZnO (s) + H2O (l) + 2e– → Zn (s) + 2OH– (aq) (E° = – 1.28 V)
Outer half Cell:
2MnO2 (s) + H2O (l) + 2e– → Mn2O3 (s) + 2OH– (aq) (E° = + 0.15V)

Jump to: Wednesday Homework / top ______________________________________________ 9/20 – Wednesday – A Day – 2, 3a/4 Lab
Main focus –
a) To Construct a Voltaic cell with greatest sustained voltage in 30 seconds.
LAB 2 – design a voltaic cell with greatest voltage– modest breakfast up for grabs
This Lab write-up is NOT a group slide-up. There is one presentation for every individual.ab group. I have emailed everyone with their individual link.
You need to present on the slides in the Presentation the following:
1. Title page with all Lab partners listed.
2. Objectives.
3. Materials Page listed with all available components
4. Labeled Diagram Slide of proposed voltaic cell design – Draw a diagram with your phone
______________________________________________ Jump to: top 9/20 – Wednesday Homework: –
LAB 1 is due ! Please place it into the Purple Crate tomorrow morning.
1. Lab 2 write-up (slide – up): I have sent every lab group their individual link to a blank Google Presentation through their SCHOOL email. Please open the link and begin working on your slides of your individual presentation.
1. Title page with all Lab partners listed.
2. Objectives.
3. Materials Page listed with all available components
4. Labeled Diagram Slide of proposed voltaic cell design – Draw a diagram with your phone
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Jump to: Thursday Homework / top
____________________________________________________________________ 9/21 – Thursday – B Day – 2/3b Lab, 4
a) To build a voltaic cell with the greatest sustained voltage in 30 seconds
1. Continue with LAB 2 – Voltaic cell Competition –
Voltage Tests Today!!!!
Period 3b,4 –
2. Continue with LAB 2 – Voltaic cell Competition –
You will have 2 periods today to compete your design and record your voltage.
Voltage Tests Today!!!!
LAB 2 – design a voltaic cell with greatest voltage– modest breakfast up for grabs
This Lab write-up is NOT a group slide-up. There is one presentation for every individual lab group. I have emailed everyone with their individual link.
You need to present on the slides in the Presentation the following:
1. Title page with all Lab partners listed.
2. Objectives.
3. Materials Page listed with all available components
4. Labeled Diagram Slide of proposed voltaic cell design – Draw a diagram with your phone
___________________________________________________ Jump to: top 9/21 – Thursday Homework: –
How Lithium Ion Batteries work – Video 1 :
How Lithium Ion Batteries work – Video 2 :
9/22 – Friday – A Day – 2, 3a/4 Lab
Main focus –
a) To discuss the limitations of the designs by modeling my own voltaic cell choices – this will help in your conclusion of the lab write-up
b) To complete our discussion of the voltaic cell with an another battery design..
c) To Review the concepts of the electrolytic cell with an electroplating demo and electrolysis demo.
d) To take Notes on the 2 types of Electrolytic Cells.
Period 2
*Table 1: 1.17 v : https://youtu.be/3fuVu4J8hJI
Table 2: 1.13 v : https://youtu.be/0hw8fPCLEUY
Table 3: 0.87 v. : https://youtu.be/CptaJy2aVGk
Table 4: 0.88 v : https://youtu.be/Wm8l-WEIP8w
Table 5: 0.71 v : https://youtu.be/aW2BPj48loM
Period 4
Table 1: 0.85 v : https://youtu.be/WYvIKAdWwSE
Table 3: 0.85 v : https://youtu.be/wNGbbmA43tw
*Table 4: 0.92 v : https://youtu.be/dMTYfZPoIs8
Graphical analysis file
Table 5: 0.86 v : https://youtu.be/9Nr6qJcHQ7I
3. Grodski’s Design
4. Lab 2 Slide-up work and discussion
Period 3a:
1. Electrolytic Cell introduction – Note-taking
Mr. Grodski’s voltaic cell design :
__________________________________________________ Jump to: top 9/17 – Friday’s Homework: –
1. Lab 2 Slide-up – Due Next Tuesday – Guidelines posted this week.
2. Electrolytic Cell (Non-spontaneous redox reactions) assignment – Like when you charge your phone!
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3. Please complete the Electrolytic Cell form. It will be posted later.
Electrolytic cell Assignment:
2: Electrolytic Cell intro lecture :
2: Electrolytic Cell Lecture :