Precipitation
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Precipitation
Reaction between two reactants, which lead to the precipitation of one of the products are called metaphorical or precipitation reaction. The course of such a reaction is dependent upon the solubilities of the possible products in a particular solvent, i.e., it is solvent dependent. For example, in water barium chloride reacts with silver nitrate to yield a precipitate of silver chloride while Ba (NO3)2 being soluble remains in solution.
H2O
BaCI2 + 2AsNO3 → Ba(NO3)2 + 2AgCI
On the other hand, f the reaction between (Ba(NO3)2 and AgCI is carried out in liquid NH3 instead of in water, a white precipitate of BaCI2 is obtained. We have seen
liq. NH3
2AgCI + Ba (NO3)2 → BaCI2 ↓ + 2AgNO3
a reversal of the reaction on changing the solvent. Similarly, sodium hydroxide which is highly soluble in water can be precipitated in liquid ammonia and copper sulphate which is soluble in water can be precipitated form acetic acid solution.
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H2O
BaCI2 + 2AsNO3 → Ba(NO3)2 + 2AgCI
On the other hand, f the reaction between (Ba(NO3)2 and AgCI is carried out in liquid NH3 instead of in water, a white precipitate of BaCI2 is obtained. We have seen
liq. NH3
2AgCI + Ba (NO3)2 → BaCI2 ↓ + 2AgNO3
a reversal of the reaction on changing the solvent. Similarly, sodium hydroxide which is highly soluble in water can be precipitated in liquid ammonia and copper sulphate which is soluble in water can be precipitated form acetic acid solution.
For more help in Precipitation click the button below to submit your homework assignment