Chemistry · Oct / Nov 2021 · Paper 11 · Question 15
5070Electrolysis
The apparatus shown is set up to plate a steel key with copper. [diagram] The key does not get coated with copper. Which change needs to be made to plate the key?
- AIncrease the concentration of the aqueous copper(II) sulfate.
- BIncrease the voltage.
- CReplace the solution with dilute sulfuric acid.
- DReverse the electrical connections.
As printed in the paper
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Correct answer: D. Reverse the electrical connections.
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