Question

A buffer with pH 10 is to prepared by mixing NH₄Cl and NH₄OH. Calculate the number of moles of NH₄Cl that should be added to one litre of 1 M NH₄OH. (K_b = 1.8 × 10^–5) : 

Answer 1

Handerson equation for base buffer may be given as :

[Salt] = 0.18 M 

No. of moles of NH₄Cl = 0.18