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Predict which combination of metals in Exercises 3 and 4 will result in the greatest voltage. Explain your prediction. h en calculate the voltages of the redox reactions. Was your prediction correct?

$=+2.46 \mathrm{~V}$

Chemistry 102

Chemistry 101

Chapter 21

Controlling Energy

Section 5

Electrochemical Cell

Thermodynamics

Thermochemistry

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03:07

A liquid is a nearly incom…

04:38

A liquid is a state of mat…

02:34

Predict the outcome of the…

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01:31

Draw a redox reaction that…

01:18

Predict whether the follow…

02:03

Use the activity series of…

02:59

Identify which of the foll…

02:24

Calculate the voltage and …

04:41

00:21

Consider the following red…

01:46

Identify the following rea…

question Number five now asks us to look at the chemical reactions involved in the electrochemical cells for problem three and four. So there are a total of four electrochemical cells and calculate the electrochemical potentials. But before calculating them, you are asked to predict which one will have the greatest electrochemical potential or the greatest voltage associated with it. To answer that, we simply need to look at the activity Siri's and find the two medals that air farthest from each other on the activity. Siri's, the two medals that air farthest from each other on the activity. Siri's will result in the greatest voltage for the electrochemical cell. It turns out, aluminum and silver are farthest from each other on the activity, Siri's. Then we need to go to the standard reduction potential table, which is a page down in your textbook, and we can actually calculate the electrochemical potentials after looking at that, um, a standard reduction potential table. It turns out that many a few of the metals are not present. When I was talking about was iron going toe iron three plus. So we'll have to assume iron going toe iron two plus and then you may need to get on the Internet to find some other standard reduction potentials. S l is going to be whatever serving us the cathode, which we defined in those previous problems. So you could go back and look the cathode potential minus theano potential. And we get positive. 2.46 volts for copper and tin SL is going to be cathode potential minus and potential. We get 0.195 volts for the next one. It's copper and lead. So the cathode potential minus theano potential. We get positive 10.47 and then calcium and iron will assume iron two. Plus, we've got cathode potential minus and potential. We get 2.42 So, yes, I predicted that aluminum in the silver would result in the largest voltage for the electrochemical cell. And it does, but just barely.

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