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The equivalent weight of Na(2) HPO(4) ca...

The equivalent weight of `Na_(2) HPO_(4)` can be
a. `M//2` as base b. `M//1` as acid
c. Both (a) and (b) d. Neither (a) and (b)

Text Solution

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c. `Na_(2) HPO_(4) rarr 2Na^(o+) + HPO_(4)^(2-)`
`HPO_(4)^(2-) underset({:("Acidic"),("nature"):})rarr H^(o+) + PO_(4)^(3-)` (`n` factor = 1)
`{:("Basic"),("nature"):}darr +2H^(o+)`
`H_(2) PO_(4) ( :. Ew = (M)/(2))` (`n` factor = 2)
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