Question

PH of solution & degree ionization pls help

What is the pH of the solution and degree ionization of a 0.75M Solution of HF in a solution of 0.12 m HC17 The Xa of hydrofluoric and is 6.8*104 at 25°C. Hellag) + H₂O 2 H3 tot el cag) HF + H₂O 2 H₂O + FT 0.12M X 0.12M X I 0.75 Ka = (0.12ty) y .6.8x10-4 C y 0.12ty E ons-y 0.12 (а — 0.75 y

Answer 1

1)

concentration of HCl = 0.12 M

concentration of HF = 0.75 M

[H+] = sqrt (Ka x C) = sqrt (6.8 x 10^-4 x 0.75)

        = 0.0226 M

total [H+] = 0.12 + 0.0226 M

              = 0.14 M

pH = -log [H+] = -log (0.14)

pH = 0.846

% ionization = ([H+] / C ) x 100

                     = 0.14 / (0.12 + 0.75) x 100

% ionization = 16.4 %