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Checking Electrons in a Model Metal Deposit 4 questions
Checking Electrons in a Model Metal Deposit
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A class models two metal deposition trials. The silver trial reduces Ag+ to Ag. The zinc trial reduces Zn2+ to Zn. An instrument reports that 4.0 mmol of electrons reach the electrode in each trial. The ideal model first assigns all of those electrons to depositing metal.
Ag+ + e- → Ag Zn2+ + 2e- → Zn
Question 1
Calculate the ideal amount of silver and of zinc that can deposit in their respective trials.
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Question 2
Which statement explains why the ideal amounts differ?
- Zinc needs more electrons per ion than silver.
- Zinc needs fewer electrons per ion than silver.
- Silver does not gain electrons during deposition.
- The silver trial delivers more electrons.
The zinc trial actually deposits 1.5 mmol Zn. Assume the electron reading and the zinc measurement are accurate.
Question 3
Calculate how many millimoles of the delivered electrons were used for zinc deposition.
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Question 4
A student says all 4.0 mmol of electrons went to the zinc change shown. Evaluate that claim using the measurements.
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