Question

# The degree of hydrolysis of a salt of weak acid and a weak base in it's 0.1M solution is found to be 50%. If the molarity of the solution is 0.2M, the percentage hydrolysis of the salt should be:

A
100%
B
50%
C
25%
D
none of these

Solution

## The correct option is D 50%degree of hydrolysis of salt of weak acid and weak base is independent of concentration(molarity) of solutionEx.Suppose a weak acid and weak base salt $$CH_3COONH_4$$$$\underset{C(1 - h)}{CH_3COO^-} + \underset{C(1 - h)}{NH_4^+ + H_2O} \rightarrow \underset{Ch}{CH_3 COOH} + \underset{Ch}{NH_4 OH}$$ According to law of mass action $$k_h = \dfrac{C^2h^2}{C^2 (1 - h^2)} = \dfrac{h^2}{1 - h^2}$$ (Independent on C)Hence B is correct optionChemistry

Suggest Corrections

0

Similar questions
View More

People also searched for
View More