Na+ and mg2+ ions each have ten electrons surrounding their nuclei. which ion would you expect to have the larger radius? explain your answer.

Explanation has been given below.

Explanation:

Let's consider solubility equilibrium of an ionic insoluble compound e.g.

Equilibrium constant of this solubility equilibrium is represented in terms of solubility product () which is expressed as-

Now, if we add an ionic salt e.g. with a common ion then concentration of increases.

But, at a constant temperature, is constant.

Therefore, to keep constant, excess amount of will combine with free ion in solution and produce .

Hence, as a whole, solubility of decreases.