Answer to Question #156748 in General Chemistry for sameera abrahimi

Question

Calculate the pH of the resulting solution made by adding 2 moles of of KCN_(aq) into 3 L of water.

Answer 1

Concentration of KCN = 2 mol / 3 L .

In This Case Anionic hydrolysis So ,

P^H = 7 + P^K / 2 + log C / 2 .

= 7 + 9.2 / 2 + log 0.33

= 7 + 4.6 + ( - 0.4814 )

= 11.6 - 0.4814 = 11.6 - 0.5 = 11.1 Answer .