An aqueous solution contains one or more of the metal cations Mg2+, Ba2+, and Pb2+ at concentrations — Aqueous Chemistry Chemistry Question
Question
An aqueous solution contains one or more of the metal cations Mg2+, Ba2+, and Pb2+ at concentrations of 0.1 M. Addition of an equal volume of 0.1 M sodium sulfate causes formation of a precipitate. Which inference regarding the original solution is correct?
A.
The solution must contain Mg2+ or Ba2+.
B.
The solution must contain Mg2+ or Pb2+.
C.✓ Correct
The solution must contain Ba2+ or Pb2+.
D.
The solution must contain Mg2+, Ba2+, and Pb2+.
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