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1. why must the organic solvent be separated by extraction be insoluble in water. 2. what...

1. why must the organic solvent be separated by extraction be insoluble in water.

2. what is the purpose of washing with water after extraction with a reaction solvent?

3. what is the purpose of using a tared test tube?

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Answer #1

1. if the organic solvent is miscible with water, the solvent extraction and separation cannot be achieved. The solvent extraction method is based on the difference in solubility of the compound in both the layers. Tw6 solvents i.e water and organic solvent are immiscible with one another.

2. Repeated washing of organic layer is done to make sure all the desired compound has been extracted from water, and minimum loss in yield is observed.

3. the Test tube is tared, as the reading mentioned in the weighing machine, depicts the weight of the compound, not the weight of testube + compound.

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