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Graphite electrodes are used in the electrolysis of aqueous copper( II ) sulfate. State the name of the product made at each electrode. anode
See it on the paper →Suggest a suitable solution to be used as the electrolyte for electroplating the coin. (ii)
See it on the paper →When concentrated aqueous sodium chloride is electrolysed, gases are released at each inert electrode. State the names of the gases released at each electrode. gas at cathode gas at anode
See it on the paper →In an electrolysis experiment, using carbon electrodes, aqueous copper(II) sulfate is broken down. State the product made at each electrode. anode cathode
See it on the paper →State the name of the electrolyte solution the student uses.
See it on the paper →The student uses impure copper as the anode. State what the student uses as the cathode.
See it on the paper →Only a few incorrect responses with the following being the most common: copper(II), sulfur, sulfate and Cu2+.
— Examiner report, October/November 2023, 0654/43 Q8(b) (Cambridge)
The electrolyte was sometimes named correctly as copper sulfate solution. Non-ionic, insoluble and solid substances were also suggested.
— Examiner report, October/November 2022, 0654/41 Q11(b)(i) (Cambridge)
The cathode was sometimes named as pure copper. Graphite and other metals were also suggested.
— Examiner report, October/November 2022, 0654/41 Q11(b)(ii) (Cambridge)
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