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Given the following K(a) values, determi...

Given the following `K_(a)` values, determine which species is the strongest base ?
`HSO_(4)^(-)=1.2xx10^(-2),H_(2)PO_(4)^(-)=6.3xx10^(-8),HCO_(3)^(-)=4.7xx10^(-11)`

A

`CO_(3)^(2-)`

B

`H_(2)SO_(4)`

C

`SO_(4)^(2-)`

D

`HPO_(4)^(2-)`

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