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The equivalent weight of phosphoric acid...

The equivalent weight of phosphoric acid `(H_3 PO_4)` in the reaction,
` NaOH +H_3 PO_4 to NaH_2 PO_4 +H_2 O` is

A

59

B

49

C

25

D

98

Text Solution

Verified by Experts

The correct Answer is:
D

Here 1 mole of NaOH reacts with 1 mole of `H_3 PO_4`. Since substances react in the ratio of their gram equivalents, thus, I g equivalent weight of NaOH reacts with 1 g equivalent weight of `H_3 PO_4`. Therefore, equivalent weight of `H_3 PO_4` in this reaction is 98.
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