A Determine the pH of 29x105M HCN Express answers in two dec

(A) Determine the pH of 2.9x10^-5M HCN. Express answers in two decimal places.

(B) Determine the pH of 2.9x10^-5M C6H5NH2. Express answers in two decimal places.

(a)Reaction HCN ---> H+ + CN-

pH = -log10[H+] = -log10(2.9*10^-5) = 4.53...........ANS

(b)Reaction = C6H5NH2 + H20 -------> C6H5NH3+ + OH-

pH = 14 + log10[OH-]

pH = 14 + log10(2.9*10^-5) = 9.46..........ANS