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Tracking Electrons Between Two Ion Reductions 4 questions
Tracking Electrons Between Two Ion Reductions
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A cell simulation sends electrons to a compartment containing Cu2+ and Fe3+. Copper ions use two electrons each to form solid Cu. Iron ions use one electron each to form dissolved Fe2+. The supplied electrons are used only by these two routes.
Cu2+ + 2 e- → Cu
Fe3+ + e- → Fe2+
| Trial | Electrons supplied (model units) | Copper atoms deposited (model units) |
|---|---|---|
| P | 8 | 3 |
| Q | 8 | 2 |
Question 1
Which reaction in the display gives a solid product?
- Copper reduction only
- Iron reduction only
- Both reductions
- Neither reduction
Question 2
Calculate how many iron ions are reduced in P and in Q.
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Question 3
A student says the equal electron inputs prove equal amounts of copper were deposited. Use both records to evaluate the claim.
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In a repeat the iron ions are absent and there are enough copper ions to use all eight supplied electrons.
Question 4
Predict the number of copper atoms deposited in the repeat.
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