A student sets up an experiment to perform the electrolysis of aqueous copper(II) sulfate, CuSO4(aq)\text{CuSO}_4(\text{aq})CuSO4(aq), using inert graphite electrodes as shown in the diagram below:
Which of the following rows correctly identifies the product formed at each electrode and the change in pH of the electrolyte in the region immediately surrounding the anode (+)?
Cathode product: Cu(s)\text{Cu(s)}Cu(s); Anode product: O2(g)\text{O}_2\text{(g)}O2(g); pH near anode: Decreases
Cathode product: H2(g)\text{H}_2\text{(g)}H2(g); Anode product: O2(g)\text{O}_2\text{(g)}O2(g); pH near anode: Increases
Cathode product: Cu(s)\text{Cu(s)}Cu(s); Anode product: SO2(g)\text{SO}_2\text{(g)}SO2(g); pH near anode: Decreases
Cathode product: Cu(s)\text{Cu(s)}Cu(s); Anode product: O2(g)\text{O}_2\text{(g)}O2(g); pH near anode: No change
Electrolytic processes Questions
Practise Edexcel GCSE Chemistry Electrolytic processes with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.