Question

Dissolution of salt in water is a _________ change

Answer 1

Dissolution of salt in water is a $\text{Chemical}$ change

A chemical change involves a chemical reaction, with new substances produced as a result of the change. When you dissolve salt in water the sodium chloride dissociates in $N{a}^{+}$ ions and $C{l}^{-}$ ions, which may be written as a chemical equation:

$NaCl\left(s\right)\to N{a}^{+}\left(aq\right)+C{l}^{-}\left(aq\right)$

Therefore, dissolving salt in water is an example of a chemical change.