Question

Calculate the hydrolysis constant `(K_(h))` and degree of hydrloysis `(h)` of `NH_(4)C1` in `0.1M` solution.
`K_(b) = 2.0 xx 10^(-5)`. Calculate the `[overset(Theta)OH]` ions in the solution.

Answer 1

Correct Answer - A
i. `NH_(4)C1` is a salt of `W_(B)//S_(A)`.
`K_(h) = (K_(w))/(K_(b)) = (10^(-14))/(2xx10^(-5)) = 5 xx 10^(-10)`.
ii. `h = sqrt((K_(h))/(c))`
`= ((5 xx 10^(-10))/(0.1))^((1)/(2))`
`= sqrt(50) xx 10^(-5)`
`= 7.07 xx 10^(-5)`
iii. `[overset(Theta)OH] = Ch = 0.1 xx 7.07 xx 10^(-5) = 7.07 xx 10^(-6)M`.