1.

Sodium bicarbonate can be manufactured by Solvary process where addition of brine solution to ammonium bicarbonate solution gives precipitation of sodium bicarbonate. But, its analogue, potassium bicarbonate cannot be prepared by the above process. Explain with respect to the concept of solubility product

Answer»

Solution :Sodium bicarbonate has low value of solubility product. Addition of sodium chloride solution to ammonium carbonate solution results in the double DISPLACEMENT reaction that results in the precipitation of sodium bicarbonate, as ionic product. Potassium bicarbonate has HIGH value of solubility product and is highly soluble. In this case, though double displacement takes place, ionic product cannot exceed the high value of solubility product of `KHCO_(3)`. Therefore, precipitation cannot TAKE place. Hence, this method cannot be EMPLOYED for the preparation of potassium bicarbonate


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