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Chemistry 5070 · Cambridge (CAIE) O Level
Electrochemistry
3 past-paper questions on Electrochemistry · examined 2020–2025.
20252 questions
5070/21 · O/N · Q9(e) [4]Sign up to mark my answer →
Complete Table 9.1 for the electrolysis of aqueous copper(II) sulfate with carbon and copper electrodes.
5070/21 · O/N · Q9(f) [1]Sign up to mark my answer →
Explain why aqueous copper(II) sulfate conducts electricity but solid copper(II) sulfate does not.
20201 question
5070/21 · O/N · Q5(d)(ii) [1]Sign up to mark my answer →
The reaction at one of the electrodes in the fuel cell is shown. O2 + 2H2O + 4e– 4OH– State whether this is an oxidation or reduction reaction. Explain your answer.
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