What is the difference between displacement and double displacement reaction write equation for this reaction?

Question: What is the difference between displacement and double displacement reaction write equation for this reaction?

A displacement reaction involves a single element being replaced in a compound, such as when zinc displaces copper in copper sulfate to form zinc sulfate and copper metal: \( \text{CuSO}_4(aq) + \text{Zn}(s) \rightarrow \text{ZnSO}_4(aq) + \text{Cu}(s) \). In contrast, a double displacement reaction involves the exchange of ions between two compounds, like when barium chloride reacts with sodium sulfate to form barium sulfate and sodium chloride: \( \text{BaCl}_2(aq) + \text{Na}_2\text{SO}_4(aq) \rightarrow \text{BaSO}_4(s) + 2\text{NaCl}(aq) \). These reactions are fundamental in the study of chemistry, showcasing the reactivity of elements and compounds.

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