Copper(II) sulfate solution is electrolysed using copper electrodes.
Which observations are made?
The anode loses mass, the cathode gains mass and the blue colour fades
The anode gains mass, the cathode loses mass and the blue colour stays the same
Both electrodes gain mass and bubbles of oxygen form at the anode
The anode loses mass, the cathode gains mass and the blue colour stays the same
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.