Concentrated aqueous magnesium iodide is electrolysed using graphite electrodes. Predict the product at each electrode. anode cathode

1. (a)Concentrated aqueous magnesium iodide is electrolysed using graphite electrodes. Predict the product at each electrode. anode cathode[2]
2. (b)Molten magnesium iodide is electrolysed using graphite electrodes. Construct the ionic half-equation for the reaction at each electrode when molten magnesium iodide is electrolysed. anode cathode[2]
3. (c)Describe a test for aqueous iodide ions. Include the observations for a positive result. test observations[2]
4. (d)Iodide ions reduce manganese(IV) oxide, MnO₂, to Mn²⁺ ions. 2I⁻ + MnO₂ + 4H⁺ → Mn²⁺ + I₂ + 2H₂O
5. (d)(i)Explain, in terms of movement of electrons, how iodide ions act as a reducing agent in this reaction.[1]
6. (d)(ii)State the name of the type of reaction that involves simultaneous oxidation and reduction.[1]
7. (e)Phosphorus(III) iodide is produced when phosphorus reacts with iodine. Complete Fig. 4.1 to show the dot-and-cross diagram for a molecule of phosphorus(III) iodide. Show only the outer shell electrons. [Figure 4.1][2]

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