1.

Na_2CO_3 cannot be used in place of (NH_4)_2,CO_3, for precipitation of group Vcations because

Answer»

Na INTERFERES in the detection of group V
Concentration of `CO_3^(2-)` is very LOW
`Na^+` will react with ACID RADICALS
`Mg^(2+)` will precipitate as `MgCO_3`, if present in the mixture

Answer :D


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