Question

Calculate the concentrations of the various species (H₃0⁺, OH^-, OCI^- and HOCI) present in 0.10 M HOCO. K_a = 3.5 x 10^-8

Thank You!

Answer 1

concentration of HOCl = 0.10 M

HOCl + H2O   ----------------> OCl- +   H3O+

0.10                                           0               0

0.10 - x                                      x               x

ka = x^2 / 0.10 -x

3.5 x 10^-8 = x^2 / 0.10 -x

x = 5.91 x 10^-5

[H3O+] = 5.9 x 10^-5 M

[OH-] = 1.7 x 10^-10 M

[OCl-] = 5.9 x 10^-5 M

[HOCl] = 0.10 M