Question

The degree of hydrolysis for a salt of strong acid and weak base

• A. Is independent of dilution
• B. Increases with dilution
• C. Increases with decrease in $K_b$ of the bases
• D. Decreases with decrease in temperature

Answer 1

Answer: (B), (C), (D)

The correct options are
B Increases with dilution
C Increases with decrease in $K_b$ of the bases
D Decreases with decrease in temperature

The degree of hydrolysis $\left(h\right)$ can be used as a quantitative characteristic for the hydrolysis of salts. It is equal to the ratio of the concentration of the hydrolyzed part of the molecules to the total concentration of the particular salt in solution, and in most cases it is small.

The degree of hydrolysis for salt of strong acid and weak baseincreases with an increase in temperature and with dilution. If acid and base both are weak then degree is independent of dilution.

For salt of strong acid and weak base degree of hydrolysis is $h=\sqrt{\frac{K_w}{K_b\times c}}$

Therefore when value of $h$ increases when $K_b$ decreases.