Question

Find equivalent at of H3PO4 in reaction NaOH+H3PO4-NaH2PO4+H20

Answer 1

quivalent mass of the acid = Molecular mass/No of replaceable H+ (basicity)


In the given reaction,


NaOH+H3PO4−−>NaH2PO4+H2O

One of the acid hydrogen is replaced by Na


So Equivalent mass of H3PO4 = 

Molecular mass of H3PO4/1                            


= (3 ×1 + 1× 31 + 4 × 16)/1 = 98

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