PH Of hydrogen cyanide?

Question

Calculate the pH of a 0.1M solution of the weak acid, hydrogen cyanide, HCN given that the dissocation constant of this acid is 4.9 X 10^-10, Caclulate the pH of a 0.2 molar solution of sulphuric acid and a 0.2 molar solution of sodium hydroxide.

Answer 1

the pH of hydrogen cyanide is 9.2 - 9.3 look into the source for deeper information.