Question

How are the following substances separated from water?
3.8.1 Sand (1)
3.8.2 Ethanol (1)
3.8.3 Oil

Answer 1

Answer:

a.sand can be separated from water by sedimentation and decantation

Sedimentation and decantation methods are used for the

separation of insoluble substances which are heavier than liquid. ... Decantation follows sedimentation. The decantation process involves pouring clear, upper liquid out of the container, without disturbing the sediment.

b. by fractional distillation

For example, liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation. This method works because the liquids in the mixture have different boiling points. When the mixture is heated, one liquid evaporates before the other.

c.oil can be separated by separating funnel

Two immiscible liquids, oil and water, can be separated by using Separating Funnel. The mixture of oil and water forms two separate layers because they are completely insoluble in each other. Oil forms the upper layer while water forms lower.

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