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A student hypothesised that polishing the zinc, Zn, electrode in an Fe-Zn galvanic cell would increase the current produced by the cell - VCE - SSCE Chemistry - Question 10 - 2021 - Paper 1
Question 10
A student hypothesised that polishing the zinc, Zn, electrode in an Fe-Zn galvanic cell would increase the current produced by the cell. What would be the most vali... show full transcript
Worked Solution & Example Answer:A student hypothesised that polishing the zinc, Zn, electrode in an Fe-Zn galvanic cell would increase the current produced by the cell - VCE - SSCE Chemistry - Question 10 - 2021 - Paper 1
Step 1
measuring the change in mass per unit time of the Fe electrode in the same Fe-Zn galvanic cell before and after the Zn electrode was polished
Answer
This method allows for a direct observation of the effect that polishing the Zn electrode has on the current produced by the galvanic cell. By measuring the change in mass of the Fe electrode, we can infer the rate of reaction and thus the current produced in the cell. This approach provides quantitative data that correlates the electrode's state with the electrochemical process occurring in the cell.