A student electrolyses sodium nitrate solution using inert electrodes. A gas collected at the cathode gives a squeaky pop with a lit splint. A gas collected at the anode relights a glowing splint.
Explain why these gases form at the electrodes.
98 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.