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Q.

The equivalent mass of phosphoric acid (H3PO4)  in the reaction, NaOH+H3PO4NaH2PO4+H2O,  is :

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a

25

b

49

c

59

d

98

answer is D.

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Detailed Solution

Only one hydrogen atom of H3PO4  is replaced. So is equivalent mass is equal to its molecular mass.

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The equivalent mass of phosphoric acid (H3PO4)  in the reaction, NaOH+H3PO4→NaH2PO4+H2O,  is :