Question

types of reactions
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sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride.
$2nacl(aq) + cuso_4(aq) \
ightarrow na_2so_4(aq) + cucl_2(s)$
this equation represents a
$circ$ synthesis reaction.
$circ$ decomposition reaction.
$circ$ single replacement reaction.
$circ$ double replacement reaction.

Explanation:

In this reaction, the cations ($\text{Na}^+$ and $\text{Cu}^{2+}$) and anions ($\text{Cl}^-$ and $\text{SO}_4^{2-}$) of the two reactants swap places to form new compounds. Synthesis reactions combine simpler substances into a single compound, decomposition breaks a compound into simpler substances, and single replacement involves one element replacing another in a compound. This matches the definition of a double replacement reaction.

Answer:

double replacement reaction.