MDCAT Chemistry MCQ #2237

A student compares the addition of NaCl to CH3COOH (common ion effect) and the dissolution of Na2CO3 in water (hydrolysis). These differ because:

MDCAT Chemistry MCQ #2237

  1. Question 1

    Q1. A student compares the addition of NaCl to CH3COOH (common ion effect) and the dissolution of Na2CO3 in water (hydrolysis). These differ because:

    • A) Both processes increase the solubility of the salt
    • B) Common ion effect suppresses ionization while hydrolysis involves water reaction
    • C) Both processes always result in a neutral solution
    • D) Hydrolysis occurs only in saturated solutions of AgCl

    Answer: Common ion effect suppresses ionization while hydrolysis involves water reaction

    Explanation: Common ion effect suppresses ionization of weak electrolytes, while salt hydrolysis involves ions reacting with water to change the pH.