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Comparing Charge Over Two Cell Tests 4 questions
Comparing Charge Over Two Cell Tests
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A classroom cell simulation records current during two tests of an electron-transfer reaction. One ampere corresponds to one coulomb of charge passing per second. Assume all measured charge comes from the reaction. In the model, oxidation of one M atom releases two electrons.
| Test | Current during first 10 s (A) | Current during second 10 s (A) |
|---|---|---|
| P | 0.40 | 0.10 |
| Q | 0.30 | 0.30 |
Question 1
Which test transfers more charge during the first 10 s?
- P, because it has the larger current during that interval.
- Q, because its current stays constant for longer.
- P and Q transfer the same charge during that interval.
- The first-interval currents do not allow the charges to be compared.
Question 2
Calculate the total charge transferred in each test. Show how you use both intervals.
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Question 3
Which test oxidizes more M atoms? Explain why the first-interval comparison alone would give the wrong conclusion for the complete test.
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The class repeats P but continues its second current of 0.10 A for 20 s instead of 10 s. The first interval remains unchanged.
Question 4
Determine whether the repeated P test oxidizes the same number of M atoms as the original Q test. Show your comparison.
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