A student plans to electrolyse potassium bromide solution with inert electrodes. The student predicts that potassium will form at the negative electrode and oxygen will form at the positive electrode.
Explain why each of the student's predictions is wrong. Give the correct product at each electrode in your answer.
76 exam-style questions on AQA GCSE Chemistry 4.3 Electrolysis, covering 4.3.1a The process of electrolysis, 4.3.1b Half equations in electrolysis, 4.3.2 Electrolysis of molten ionic compounds, 4.3.3 Using electrolysis to extract metals, 4.3.4 Electrolysis of aqueous solutions, and 4.3.5 Representation of reactions at electrodes as half equations. Each one has a worked solution and a mark scheme showing where the marks go.