Making insoluble salts
3 marks · EasyThe following reaction occurs when lead(II) nitrate and sodium sulfate solutions are mixed:
Name the precipitate formed.
Identify all the spectator ions in this reaction.
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(a) Lead(II) sulfate (PbSO4)
(b) Sodium ions (Na^+) and nitrate ions (NO3^-)
Common mistakes: Naming sodium or nitrate as the precipitate
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Marking points
B1 (a) · 1 mark · Names lead(II) sulfate (PbSO4) as the precipitate.
B2 (b) · 1 mark · Identifies sodium ions (Na^+) as a spectator ion.
B3 (b) · 1 mark · Identifies nitrate ions (NO3^-) as a spectator ion.
Worked solution
a) The precipitate formed is lead(II) sulfate (PbSO4). b) The spectator ions in the reaction are sodium ions (Na^+) and nitrate ions (NO3^-).