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At times NH_(4)OH is added before adding (NH_(4))_(2)CO_(3) to precipitate group V cations explain. |
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Answer» SOLUTION :Ammonium hydroxide reats with bicarbonate present as impurity in `(NH_(4))_(2)CO_(3)` as follows: `NH_(4)HCO_(3)+NH_(4)Ohto(NH_(4))_(2)CO_(3)+H_(2)O` ltbr. The presence of bicarbonate is undesirable as the bicarbonates of Ba, Sr and Ca are soluble in WATER. |
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