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Question

Which of the following is the conjugate acid of $$HPO_{4}^{-2}$$?


A
H2PO4
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B
PO34
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C
H3PO4
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D
H3O+
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Solution

The correct option is A $$H_{2}PO_{4}^{-}$$
When a base accepts a proton, the resulting species is its conjugate acid.
Now, when $$HPO_4^{2-}$$ accepts a proton, it gives $$H_2PO_4^-$$.
Hence, $$H_2PO_4^-$$ is the conjugate acid of $$HPO_4^{2-}$$


Chemistry

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