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A buffer consists of 0.20 M KHCO3 and 0.44 M K2CO3. Carbonic acid is a diprotic acid with Ka1 = 4.5 multiplied by 10-7 and Ka2 = 4.7 multiplied by 10-11.
(a) Which Ka value is more important to this buffer?
Ka1 or Ka2
(b) What is the buffer pH?
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