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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) rarr NaH_(2)PO_(4)+H_(2)O` is

A

25

B

49

C

59

D

98

Text Solution

Verified by Experts

The correct Answer is:
D
`2 NaOH + H_3 PO_4 rarr NaH_2 PO_4 + H_2 O`
Only one hydrogen atom of `H_3 PO_4` is replaced, hence equivalent mass of `H_3 PO_4` is equal to its molecular mass.
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