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Complete these single displacement reactions:
1. zinc (s) + copper chloride (aq) --> ( zinc chloride, zinc copper, zinc ) (aq) + ( copper, zinc, chloride zinc ) (s)
2. potassium (s) + sodium chloride (aq) --> ( potassium chloride, potassium sodate, potassium sulfate ) (aq) + ( sodium, potassium, chlorine ) (s)
3. sodium (s) + copper sulfate (aq) --> ( sodium sulfate, copper sodate, sulfur sodide ) (aq) + ( copper, sulfur, sodium ) (s)