SUMMER INSTITUTE – Module 10 – Electrochemistry – WORK – Not in use!
This is the last Module! You all have worked very hard and all the work that you have put in will make your life SO MUCH EASIER in the up and coming year. Please Trust me.
But I need One more module out of you! This one will challenge you a bit and if you can try to gain as much as you can from this module it will be worth it.
And Oh by the way this was part of the Summer Assignment for the NON-Institute students who want take AP Chemistry.
DUE by (or on) by Sept 6th –
***By the way we are in the 4th quarter..
4 Hours
In every worksheet that I ask you to complete with me from the video lectures or on your own please keep and collate. I will collect these in September on the first day of classes!!
*Connections – In the last module we looked at element that gained and lost electrons to become ionic compounds. The loss and gain of electrons that occurs in chemical reactions is called Redox Reactions.
So we say metals lose electrons but we can also say that they oxidize!
We say nonmetal gain electrons but we can also say they get reduced (in charge because they are gaining negatives).
Put reduction and oxidation together and you get REDOX.
Please watch the Introduction to this Module before you begin:
ACTIVITY 1: Skill: Assigning Oxidation numbers
This is an important skill as it will help us identify the chemical species that lost (LEO – oxidized)
and gained (GER – reduced) electrons. Most reactions are redox reactions.
1. Please download file below and view the Lecture Video posted below. This video will walk you through the Assigning oxidation numbers 1011.pdf worksheet*. You will probably remember a lot of this but you are required to view the lecture in its entirety. I have also posted a key if that is helpful to you.
*Keep the hard copy of the completed worksheet as I will collect them in September.
Assigning oxidation numbers 1011.pdf
Assigning Oxidation Numbers –
ACTIVITY 2: Skill: Writing Simple Half Reactions:
This is an important skill as it will help us identify parts of a chemical reaction that lose (LEO – oxidize)
and gain (GER – reduce) electrons. This is essential in electrochemical cells.
1: Please view the 2 demos that are on the same reaction, Thermite Reaction. The 1st one is a with rusty steel spheres and aluminum foil while the other one is larger scale with iron oxides (rust) mixed with Aluminum.
2: Please view the Lecture Video below that teaches how to write SIMPLE Half Reactions.
*Keep the hard copy of the completed worksheet as I will collect them in September.
Smaller Scale Thermite Reaction:
Larger Scale Thermite Reaction:
Simple Half Reaction Lecture:
ACTIVITY 3: Skill: Writing and Balancing Complex Half Reactions (College Level):
All half reactions must be balanced in mass and in charge. By balancing the charge (electrons) you automatically
balance the mass of the reaction.
1: Please view the Cu and Nitric Acid Demo below (Surprise it is a Redox Reaction!!)
2: Download the Redox balancing redox equations AP regents.pdf worksheet* below and follow along with me on how I balance these more complex reaction in an acidic solution and how I balance the simpler reaction using the same rules.
3: Complete Question 3 and review with the key below:
*Keep the hard copy of the completed worksheet as I will collect them in September.
Copper, Hydrochloric Acid, Nitric Acid Demo-
Assessment : Please complete the following questions in the file below and fill out the form below. You will receive an automatic response with an email once you submit to view your score.
ACTIVITY 5: Skill: Reduction Potentials, Net Potential and Spontaneity
We use reduction potentials from the standard cell experiment to measure the ABILITY of chemical species to gain or lose electrons. When we combine reducing and oxidizing chemicals with various strengths we look to get an overall value that will determine spontaneity (or the ability of the reaction to work). That overall voltage is called a Net
Potentail.
1. Please watch both the Pre Net Potential Lecture and the Standard Cell Lecture and complete the Form below:
Pre Net Potential Lecture: The Push and pull lecture. The ability of chemicals to push and pull electrons can cause redox reactions to occur (spontaneous) or not to occur (non spontaneous). Voltage and Amperage are defined.
Standard Cell lecture: This is how we obtained values (volts) that measure how well chemicals reduce (pull)
and oxidize (push). This experiment created the Reduction Potential Table that is one of the most powerful Tables in all of chemistry.
The elements that oxidize the best are the top right and the elements that reduce the best are bottom left.
Activity of Metals Lab:
Acid and water are added to different metals to determine which metals are the most reactive or are the most spontaneous redox reactions. These observation will lead us directly to the reduction potentials.
Form:
ACTIVITY 6: Skill: Using Reduction Potentials to Determine Net Potentials and Spontaneity
We use reduction potentials from the standard cell experiment to measure the ABILITY of chemical species to gain or lose electrons. When we combine reducing and oxidizing chemicals with various strengths we look to get an overall value that will determine spontaneity (or the ability of the reaction to work). That overall voltage is called a Net
Potentail.
1. Please view the Lecture 4. 6 below and complete the worksheet* (questions 1,2,) with me.
*I will collect this worksheet.
*****I have posted the reduction potential table that I use in the lecture. It is different that one that we use for AP so that is parallels Table J! Table J was built based on reduction potential tables.
2: View the Copper Tin Video that this relates to verify the concept!
3: Watch Lecture AP 1.9 that will model question 3 for you. Please complete question 4, which will complete side one of the worksheet only.
*Keep hard copy as I will collect all worksheets from this module as a packet.
You will need a copy of the AP Reduction Potential Tables located in the AP Reference Tables: It is a little different from the one that I previously used because I was trying to show how table J was created by the earlier one.
Copper and Tin Demo:
ACTIVITY 7: Skill: Voltaic Cells (batteries)- Spontaneous Redox Cells.
You should have a strong grasp of the reactivity series of metals.
You should be able to identify and rank which metals were the most reactive (oxidize the best) and compare your results with the reduction potential table. You should be able to predict whether a metal will spontaneously react to form hydrogen gas in water or acid.
Classroom lecture on the intro of voltaic cells (batteries):
1: Please view the Regents Classroom lecture on Voltaic Cells below:
2: You may also want to view the non-classroom lecture that reviews the concepts of the voltaic cell in more concise manner.
Penny Demo (that was demonstrated in the lecture above):
Non classroom lecture:
Nice animation on Voltaic Cells:
Alkaline batteries: They follow the same principle of all voltaic cells but have parts that are different especially the salt bridge.
3: Please complete Side 1 the following worksheet* and review with the Key below:
On the back side, lets assume the switch is closed and use the reduction potential tables to determine who are the electrodes (cathode, anode).
*This will be collected.
4: Please complete side 2 of the worksheet below* and review with the lecture to review:
5: Please complete Stiochiometry 7 – 2010B.pdf worksheet* question 1, 2, 3a ,3b, and 3c.
This is a past AP Chemistry problem. It will require some thought and all your skills your have reviewed or learned here, especially balancing redox reactions. Do your best to complete this question. The voltaic or galvanic cell is set up a bit differently than easier regents scenarios but the concepts are the same. Use the key to help guide you through the problem.
*I will collect this worksheet.
ACTIVITY 8: Skill: Electrolytic Cells – Non -Spontaneous Redox Cells.
Electrolytic Cells come in 2 flavors: Electroplating and Electrolysis
Electroplating – process by which a metal is plated onto another metal
– Example- Silver plating silverware
Electrolysis of a fused salt – process by which ions are transformed into pure
elements
-Example- obtaining pure Aluminum from aluminum oxide
1: Please view the Classroom lecture on Electrolysis. Keep in mind that electrolysis is an endothermic process that needs energy.
Electrolytic Cell – Electroplating demo that was included in the classroom lecture:
Optional Non-classroom lecture on electrolytic cells.
2: Complete electrolysis worksheet* including the backside. The 2 diagrams on the back should be labeled using the same instructions that was given for number 8 on the front side.
Please review with key.
*I will collect this worksheet.
Module 10 Assessment –
Please print and complete Module 10 Assessment to the best of your ability.
It will not be graded for a score but for your effort. If you can get a majority of this then you are on your way to a successful year. If you struggle a bit no worries I WILL TEACH THIS IN CLASS Again this year and it will make more sense a second time around.
Please bring the completed test with all your worksheets FROM THIS MODULE next Tuesday!
Module 10 Test.pdf
End Of REDOX Module
END OF THE INSTITUTE!!!!
Congratulations for sticking with this Institute. ALL your work here this summer will make your life so much easier in the up and coming year. WE have more to learn and there will be more challenging concepts in the future but with this foundation you will have the tools to succeed. As always I will be there every step of the way!
Sincerely,
Mr. Grodski
The List of Hard Copy items to be handed in September 5th
1. LAB 1 Density of Solids.pdf
2. LAB 2 Density of Liquids-coke.pdf
3. Temperature Scales Graphing a ssignment
4. Lab 4 Honors Calorimety of a Cheese Curl Institute.pdf
5. LAB 5 honors -Cooling curves of an unknown substance.pdf
6. LAB 6 honors heat of fusion.pdf
7. Assigning oxidation numbers 1011.pdf
8. half reactions worksheet 1112.pdf
9. Redox balancing redox equations AP regents.pdf
10. Net potentials Demonstrations worksheet 1112.pdf
11.
voltaic cell worksheet 07.pdf
12.
voltaic cell worksheet 2 0809.pdf
13. Stiochiometry 7 – 2010B.pdf
14. Electrolylitic Cell worksheet.pdf
15. Module 10 Test.pdf