1.

Na_(2)CO_(3) cannot be used in place of (NH_(4))_(2)CO_(3) for precipitation of group V cations 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)` il present in the mixture

Solution :`Na_(2)CO_(3)` is highly ionizable electrolyte which PRODUCES very high concentration of `CO_(3)^(2-)` ions. As a result ionic PRODUCT of `MgCO_(3)` may increase its K, and it may get precipitated along with the radicals of group V.
Hence, (D) is the correct answer.


Discussion

No Comment Found

Related InterviewSolutions