Question

What is the pH of the solution when 0.20 moles of HCI is added to one litre of a solution containing : 

(i) 1M each of acetic acid and acetate ion 

(ii) 0. 1 M each of acetic acid and acetate ion 

Assume the total volume is one litre. K_a for acetic acid = 1.8 x 10^-5

Answer 1

(CH₃COOH no doubt gives H⁺ but being weak acid as well as in presence of HCl does not dissociate appreciably and thus, H⁺ from CH₃COOH may be neglected)