Chemistry 5070 · O Level · Extraction of metals

Extraction of metals — practice question

This question concerns metals and metal compounds.
(a)[2]

Magnesium undergoes reaction with aqueous iron(II) ions. $\text{Mg} + \text{Fe}^{2+} \rightarrow \text{Mg}^{2+} + \text{Fe}$ Explain why this reaction includes both oxidation and reduction. Refer to the equation and to electron transfer in your response.

(b)[1]

Explain why iron is able to conduct electricity.

(c)[1]

Explain why magnesium is extracted by electrolysis instead of by reduction with carbon.

(d)[3]

Describe a chemical test that distinguishes aqueous iron(II) ions from aqueous iron(III) ions. test used observations for aqueous iron(II) ions observations for aqueous iron(III) ions

(e(i))[1]

Explain why molten magnesium chloride is able to conduct electricity.

(e(ii))[2]

Predict the products that form at the anode and the cathode when molten magnesium chloride is electrolysed. anode cathode

(f)[1]

Food containers may be made from aluminium. State one property of aluminium that makes it suitable for use in a food container.

Worked solution & mark scheme

This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: Magnesium loses electrons, so it is oxidised

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