Assertion: The solubility of salts of weak acids like phosphates decreases at lower pH. Reason: This is because at lower pH concentration of cations increases.

Question

Assertion: The solubility of salts of weak acids like phosphates decreases at lower pH. Reason: This is because at lower pH concentration of cations increases. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

The solubility of salts of weak acids like phosphates increases at lower pH because concentration of the anion decreases due to its protonation. This in turn increases the solubility of the salt so that Ksp = Qsp.

Q. Assertion : The solubility of salts of weak acids like phosphates decreases at lower $p H$ .
Reason : This is because at lower pH concentration of cations increases.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

The solubility of salts of weak acids like phosphates increases at lower $p H$ because concentration of the anion decreases due to its protonation. This in turn increases the solubility of the salt so that $K_{s p} = Q_{s p}$ .

Q. Assertion : The solubility of salts of weak acids like phosphates decreases at lower pH. Reason : This is because at lower pH concentration of cations increases.