a buffer reated problem
Calculate the H30 + (hydronium ion) concentration
for a buffer solution of 2 M phosphonic
acid and 1.5 M potassium hydrogen phosphate
[Ka1= 7.11* 10^-3; Ka2=6.32x10^-8].
I found this problem.
Firstly I feel that phosphonic acid is wrongly written, it should be phosphoric acid.
Assumimng it as phosphoric acid I caculated pH form the equation
pH=1/2(pKa1 + pKa2 + log [HPO4-2]/[H3PO4] ), here [HPO4-2]= 1.2M and [H3PO4]=2M
from this pH I calculated [H+].
Is this the write approach to sole this problem? please help