Q37 - Hydrolysis

The correct answer is A) A neutral aqueous solution.

To predict the pH of a salt solution, ask which acid and which base the salt comes from. NaBr comes from NaOH (strong base) and HBr (strong acid). Neither Na⁺ nor Br⁻ reacts with water (no hydrolysis), so the solution stays neutral, pH ≈ 7.

A) Correct: Strong acid + strong base gives a neutral salt.

B) Incorrect: A strongly acidic solution needs an acid, such as HBr itself.

C) Incorrect: A weakly basic solution comes from the salt of a weak acid and a strong base, such as sodium acetate.

D) Incorrect: A strongly basic solution needs a strong base, such as NaOH itself.

E) Incorrect: A weakly acidic solution comes from the salt of a weak base and a strong acid, such as NH₄Cl.