Question

In the reaction 2NaOH+H3PO4 gives raise to Na2HPO4+2H2O, the equivalent weight of the acid is

Answer 1

Here is your answer

Equivalent weight of an acid is: $\frac{Molar\:\:mass\:\:of\:\:acid}{H^+\:\:ions\:\:present}$

In Na₂HPO₄ , there is one H⁺ ion

And molar mass of H₃PO₄ is : 98 (Note: you must not take the product acid)

So, your answer is: $\frac{98}{1}$ = 98

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