Question

In the fifth group, `(NH_4)_2 CO_3` is added to precipitate out the carbonates, we do not add `Na_2 CO_3` because
A. `CaCO_(3)` is soluble in `Na_2CO_(3)`
B. `Na_(2)CO_(3)` increases the solubility of fifth group carbonates
C. `MgCO_(3)` will be precipitated out in fifth group
D. none of these

Answer 1

`Na_(2)CO_(3)` furnishes greater amounts of `CO_(3)^(2-)` ions that precipitates even `Mg^(2+)` ion in group V.