Chemistry 5070 · O Level · Ion and ionic bonds

Ion and ionic bonds — practice question

Copper(II) chloride, copper(II) iodide and copper(II) carbonate are all ionic compounds.
(a)[2]

State two physical properties of copper(II) chloride, apart from electrical conductivity.

(b)[1]

Copper is a transition element. Suggest one property of copper(II) chloride that is characteristic of a compound of a transition element.

(c)[2]

Copper reacts with chlorine to produce copper(II) chloride, $\text{Cu} + \text{Cl}_2 \rightarrow \text{CuCl}_2$. Copper(II) chloride contains $\text{Cu}^{2+}$ and $\text{Cl}^-$ ions. Explain, in terms of electron movement, how $\text{CuCl}_2$ is formed from copper atoms and chlorine molecules.

(d(i))[1]

Copper(II) iodide breaks down to form iodine and copper(I) iodide. The ionic equation is $2\text{Cu}^{2+} + 4\text{I}^- \rightarrow 2\text{CuI} + \text{I}_2$. Use the information to explain that oxidation occurs.

(d(ii))[1]

Use the information to explain that reduction occurs.

(e)[1]

A sample of copper(II) carbonate is heated strongly. State the products of this reaction.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: dissolves in water

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