When carrying out the electrolysis of aqueous potassium iodide to investigate the products formed at each electrode, a student must use inert electrodes such as platinum rather than reactive metal electrodes like copper.
Explain why using inert electrodes is necessary in this investigation.
83 exam-style questions on Edexcel GCSE Chemistry 4.2 Electrolytic processes, covering 4.2.1 Electrolytes and the process of electrolysis, 4.2.2 Products of electrolysis using inert electrodes, 4.2.3 Half equations, oxidation and reduction in electrolysis, and 4.2.4 Electrolysis of copper sulfate and purifying copper. Each one has a worked solution and a mark scheme showing where the marks go.