Making insoluble salts

2 marks · Hard

Write the balanced ionic equation, including state symbols, for the formation of lead(II) sulfate as a precipitate from aqueous solutions.

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Pb^{2+}(aq) + SO_4^{2-}(aq) \rightarrow PbSO_4(s)

Also accept: \ce{Pb^{2+}(aq) + SO4^{2-}(aq) -> PbSO4(s)}

Common mistakes: Omitting state symbols; Including spectator ions

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Marking points

M1 · 1 mark · Correct ionic species on both sides (Pb^{2+}, SO_4^{2-}, PbSO_4).

A1 · 1 mark · All correct state symbols and balanced equation.

Worked solution

Lead(II) ions and sulfate ions combine to form insoluble lead(II) sulfate as a precipitate. The correct ionic equation, including state symbols, is shown above.