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Carbonic acid , H2CO3 is a diprotic acid...

Carbonic acid , `H_2CO_3` is a diprotic acid for which `K_1=4.2xx10^(-7)` and `K_2=4.7xx10^(-11)` Which solution will produce a pH closest to 9 ?

A

0.1 M `H_2 CO_3`

B

0.1 M `Na_2 CO_3`

C

0.1 M `NaHCO_3`

D

0.1 M `NaHCO_3 and 0.1 M Na_2CO_3`

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The correct Answer is:
c
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