# Why should an ionic solute be INSOLUBLE in water?

Sep 18, 2017

And if we look at aqueous solubility, carbonates, phosphates, sulfides, and oxides, whatever the cation, TEND to be insoluble in water. And why? Because for these anions, which have a greater than unit charge, necessarily have a greater degree of electrostatic interaction, which can be clearly appreciate from $\text{Coulomb's law...}$
..i.e. $F = \frac{{k}_{e} \cdot {q}_{1} {q}_{2}}{r} ^ 2$, where ${q}_{1} , {q}_{2}$ are the charges, and $r$ is the distance that separates them......