In one industrial process, calcium metal is produced by passing a direct current through molten calcium chloride, CaCl2\text{CaCl}_2CaCl2, between graphite electrodes.
Identify the electrode where the calcium forms and explain why it forms there. Include a balanced half equation 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.