Q.

The equivalent weight of phosphoric acid H3PO4in the reaction NaOH +H3PO4  →  NaH2 PO4  + H2O  is

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a

25

b

49

c

59

d

98

answer is D.

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Detailed Solution

Molecular weight of H3PO4 = 98 In the reaction only one H atom is replaced. Equivalentweight= Molecular weightNumber of ions of H ions replaced  = 981  = 98.
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