# What is the type of intermolecular attraction that occurs between the sodium ions and the water molecules?

This is an $\text{ion-dipole}$ interaction.
$N a C l \left(s\right) + \text{excess water} \rightarrow N {a}^{+} \left(a q\right) + C {l}^{-} \left(a q\right)$
The $N {a}^{+} \left(a q\right)$ species is the aquated sodium ion, which is probably ${\left[N a {\left\{{\left(O H\right)}_{2}\right\}}_{6}\right]}^{+}$; the $C {l}^{-} \left(a q\right)$ ion is something similar. This is quite properly regarded as a chemical reaction in that strong bonds have been broken, and new ion-dipole bonds and new substances have been formed.