A 1.20 mol/L solution of carbonic acid is added to a reaction vessel allowed to reach equilibrium at 25'C, according to the reaction; H2CO3(aq) >< H+(aq) + CO3^2- (aq) Keq = 4.41 x 10^-7.

Question

The numeric values of a, b, c, & d, for the equilibrium concentration of H+(aq), when expressed in the format a.bc x 10^-d are;

Cant find the answer to this question. Help much appreciated.

Answer 1

H₂CO₃(aq) <==> 2H⁺(aq) + CO₃^2-(aq)

Keq = [H⁺]²[CO₃^2-]/[H₂CO₃]

4.41x10^-7 = (x)²(x) / 1.20

x³ = 5.29x10^-7

x = 8.09x10^-3 M

a = 8

b = 0

c = 9

d = -3