This is the post lab questions for Extraction experiment, please answer all the

Question

This is the post lab questions for Extraction experiment, please answer all the questions 1. In this procedure your organic acid was isolated by precipitation and subsequent filtration. If the resulting organic acid had been soluble in the aqueous solution, how could it have been isolated? 2. You are given a two - phase system containing an aqueous layer and an organic layer, but you don’t know which is which, nor do you know the identity of the organic solvent. How could you determine which layer is the water layer? 3. In this experiment, could you have used methanol in place of dichloromethane? 4. What is the identity of the two components present in your unknown?

Explanation / Answer

1. If the resulting organic acid would have been water soluble. Extraction method would involve isolation of compound in a solvent such as diethylether.

2. If the identity of two layers are not known. Add water to the layers and see the change in volume occurs in which layer. The aqueous layer would increase due to added water. The other layer is organic.

3. Methanol is water miscible whereas dichloromethane is water immsicible so exchange of solvents is not advisable.

4. We need more experimental details to fully identify the compounds.

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