A solution is electrolysed using inert electrodes.
A layer of metal forms on the cathode. The gas made at the anode bleaches damp blue litmus paper.
Which solution is electrolysed?
Copper(II) sulfate solution
Potassium chloride solution
Copper(II) chloride solution
Silver nitrate solution
52 exam-style questions on OCR GCSE Chemistry 3.4 Electrolysis, covering 3.4.1 Products formed at the electrodes in electrolysis and 3.4.2 The technique of electrolysis. Each one has a worked solution and a mark scheme showing where the marks go.