# What do we mean when we speak of sodium chloride reaching a saturation point in aqueous solution?

Jan 12, 2016

$N a C l \left(s\right) r i g h t \le f t h a r p \infty n s N {a}^{+} \left(a q\right) + C {l}^{-} \left(a q\right)$
The above reaction is an equilibrium, and is reached when $\left[N {a}^{+} \left(a q\right)\right]$ and $\left[C {l}^{-} \left(a q\right)\right]$ achieve equilibrium concentrations for a given temperature (tho' in fact the reaction is quite insensitive to temperature). The $\left(a q\right)$ label designates the aquated ion, i.e. $\left[N {a}^{+} \left(a q\right)\right]$ is probably ${\left[N a {\left(O {H}_{2}\right)}_{6}\right]}^{+}$, a sodium ion surrounded by or aquated by 6 or so water molecules.