Chemistry 0620 · IGCSE · Electrolysis

Electrolysis — practice question

This question focuses on lithium and its compounds.
(a)[2]

When lithium reacts with nitrogen, lithium nitride, Li$_3$N, is formed. Complete the chemical equation for this reaction.

(b(i))[2]

Complete the diagram by adding labels for the anode and the electrolyte.

(b(ii))[2]

Name the products made at each electrode.\n\npositive electrode\n\nnegative electrode

(b(iii))[1]

The carbon electrodes conduct electricity. Give one additional property that these electrodes need to have.

(c)[2]

Complete the table to calculate the relative molecular mass of C$_3$H$_5$O$_2$Li$_2$.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: 6 as the coefficient of Li

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