Molten magnesium chloride is electrolysed using inert electrodes.
Statement 1: Mg2+\mathrm{Mg^{2+}}Mg2+ ions move to the cathode and each gains two electrons.
Statement 2: Cl−\mathrm{Cl^{-}}Cl− ions lose electrons at the anode and form chlorine molecules.
Statement 3: Electrons move through the molten magnesium chloride from the anode to the cathode.
Statement 4: One chlorine molecule forms for every magnesium atom that forms.
Which statements are correct?
1 and 2 only
1, 2 and 4 only
2, 3 and 4 only
1, 3 and 4 only
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.