Q.

For 10-2 M H3PO3 solution which of the following relations is correct ?

Moderate

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H3PO3 + H2PO3- + HPO32- + PO32- = 10-2

H3PO3 + H2PO3- + HPO32- = 10-2

H2PO3- + HPO32- + PO33- = 10-2

H3PO3 + H2PO3- + 2HPO32- = 10-2

answer is B.

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Detailed Solution

H3PO3⇄H2PO3- + H+H2PO3-⇄HPO32- + H+ H3PO3 is a dibasic acid.

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