Question

Calculate the hydrolysis constant for nh4cl and the oh- concentration in 0.1 molar nh4cl solution . KB of nh4oh is 1.7 5 X 10^- 5 what is its PH value

Answer 1

Answer:

Degree of Hydrolysis = 2.39 x 10^-5

pH = 5.13

Explanation:

salt of strong acid and weak base

let x be the degree of hydrolysis

Formula would be;

X = root of (kw / kb × c )

kw = 10^-14

c= 0.2 M

kb = 1.75 × 10^-5

Putting the values,we get  

Degree of Hydrolysis = x= 2.39 ×10^-5

For pH;

ph = ½ (phw - logc -phb)

= 1/2(14 –log 0.1 - 4.74)

pH = 5.13