The equivalent mass of phosphoric acid H3PO4 in reaction,NaOH+H3PO4⟶NaH2PO4+H2O is

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answer is 4.

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Detailed Solution

2NaOH+H3PO4 ⟶ NaH2PO4+H2OOnly one hydrogen atom of is replaced, hence equivent mass of H3PO4 is equal to its molecular mass