Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride. 2 NaCl aq plus CuSO sub 4 times aq rightarrow Na sub 2 SO sub 4 aq plus CuCl sub 2 times s This equation represents a

Sodium chloride and copper sulfate are two ionic compounds. Their ions switch partners: sodium combines with sulfate to form sodium sulfate, while copper combines with chloride to form copper chloride. This exchange of ions is a double replacement reaction, so choice A is correct.

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