Question

Determine the solubilities of silver chromate, barium chromate, ferric hydroxide, lead chloride and mercurous iodide at 298K from their solubility product constants given in Table 7.9. Determine also the molarities of individual ions.

Answer 1

(1) Silver chromate:

Let the solubility of be s.

Molarity of = 2s = 2 × 0.65 × 10^–4 = 1.30 × 10^–4 M

Molarity of = s = 0.65 × 10^–4 M

(2) Barium chromate:

Let s be the solubility of

Thus, = s and = s

Molarity of = Molarity of

(3) Ferric hydroxide:

Let s be the solubility of

Molarity of

Molarity of

4. Lead chloride:

Let K_SP be the solubility of

Molarity of

Molarity of chloride =

(5) Mercurous iodide:

Let s be the solubility of

Molarity of

Molarity of