In: Chemistry
Find the pH of a 0.170M HClO2(aq) solution. For HClO2, Ka=0.011.
For the given reaction -
HClO2 (aq) + H2O (l) <------------> H3O+ (aq) + ClO2- (aq)
I(M) 0.170 - 0 0
C -x +x +x
Eq (0.170-x) x x
Therefore -
Ka = 0.011 = (x)(x) / (0.170-x)
By solving the above equation - x = 0.038 M
Hence - x = [H3O+] = 0.038 M
Therefore - pH = - log [H3O+] = - log(0.038) = 1.41