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In the fifth group, (NH4)2 CO3 is added ...

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

Text Solution

Verified by Experts

`Na_(2)CO_(3)` furnishes greater amounts of `CO_(3)^(2-)` ions that precipitates even `Mg^(2+)` ion in group V.
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In fifth group, (NH_(4))_(2)CO_(3) is added to precipitate out the carbonates. We do not add Na_(2)CO_(3) because:

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