${\mathrm{NaCl}}_{\left(\mathrm{aq}\right)}+{\mathrm{AgNO}}_{3\left(\mathrm{aq}\right)}\to \mathrm{AgCl}\downarrow +{\mathrm{NaNO}}_{3\left(\mathrm{aq}\right)}$

The change taking place here is

$\underset{(\mathrm{Silver} \mathrm{nitrate})}{{\mathrm{AgNO}}_3\left(\mathrm{aq}\right)}+ \underset{(\mathrm{Sodium} \mathrm{chloride})}{\mathrm{NaCl}\left(\mathrm{aq}\right)}\to \underset{\underset{(\mathrm{White} \mathrm{precipitate})}{(\mathrm{Silver} \mathrm{chloride})}}{\mathrm{AgCl}\left(\mathrm{s}\right)(\downarrow )}+\underset{(\mathrm{Sodium} \mathrm{nitrate})}{{\mathrm{NaNO}}_3\left(\mathrm{aq}\right)}$