Look at the constituents of k1 and k2 and choose the one that matches the reaction.
You have HCO3^- and CO3^2- in the problem.
Write k1 and k2 expressions. Then determine which one has HCO3^- and CO3^2- in it.
A buffer consists of 0.14 M KHCO3 and 0.61 M K2CO3. Carbonic acid is a dirpotic acid with Ka1= 4.5*10^-7 and Ka2= 4.7*10^-11.
a) which Ka value is more important to this buffer
b) what is the buffer pH?
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