When a KI solution is added to a metal nitrate

CHEMISTRY · Single correct · A Level · Chemistry · Reactions of ions in aqueous solution · Reactions of ions in aqueous solution

Problem

When a KI solution is added to a metal nitrate, a black precipitate is produced which dissolves in an excess of KI to give an orange solution. The metal ion is: (1) Hg2+ (2) Bi3+ (3) Cu2+ (4) Pb2+

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