Q.

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

Moderate

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By Expert Faculty of Sri Chaitanya

a

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

b

H3PO3  +  H2PO3- +  HPO32-  = 10-2

c

H2PO3- +  HPO32- +  PO33-  = 10-2

d

H3PO3  +  H2PO3- +  2HPO32- = 10-2

answer is B.

(Detailed Solution Below)

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Detailed Solution

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