Complete and balance the half-equation for the reduction of magnesium ions at the negative electrode (cathode) during the industrial extraction of magnesium.
Mg2++……⋯→……… \text{Mg}^{2+} + \dots\dots\dots \rightarrow \dots\dots\dots Mg2++……⋯→………110 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.