OnlineCBT
Chemistry · EQUILIBRIUM
हिन्दीGiven below are two statements: Statement I: Precipitation of an ionic salt occurs only when the ionic product \( Q_{\text{sp}} \) is less than its solubility product \( K_{\text{sp}} \). Statement II: The solubility of sparingly soluble salts of weak acids increases with a decrease in the pH of the solution. In the light of the above statements, choose the most appropriate answer from the options given below:
Correct answer · Option 4
Statement I is incorrect but Statement II is correct.
Explanation
Precipitation occurs when \( Q_{\text{sp}} > K_{\text{sp}} \) (not less). At lower pH, protonation of the weak acid anion reduces its free concentration, increasing solubility. Statement I is incorrect and Statement II is correct.
