Name: Mixtures
Uploaded: 2019-07-19
Duration: 5 min 13 s
Description: Cooks make tasty mixtures that we love. It is basically a mix of different substances. Soil is a mixture too. Not very tasty, right? This video tells you why...

Question

Can three liquids form an immiscible mixture? Explain with an example. How will you separate them?

Accepted Answer

Yes, three liquids can form an immiscible mixture. Example, a mixture of kerosene, water and hexane. They form three distinct layers because each liquid has its own density. Water is denser than hexane and kerosene. Hence, water will be present at the bottom. Above water, the kerosene layer is present and above that hexane layer is present because hexane is less dense than kerosene.

These kinds of liquids are separated by using a separating funnel. A separating funnel is a barrel-shaped glass tube which has a thin stem at the base. There is a stopcock at the bottom to regulate the flow of liquids. The immiscible liquid mixture is poured into the funnel from the top and allowed to stand for some time. The liquids form separate layers. The lighter liquid hexane forms the upper layer whereas the heavier liquid water forms the lower layer. The kerosene forms the middle layer. The liquid at the lower level is collected first by carefully opening the stopcock. As soon as the heavier liquid flows out completely, the stopcock is closed. In this way the second layer is collected in other beaker and lighter liquid will be present in the funnel.

Can three liquids form an immiscible mixture? Explain with an example. How will you separate them?

Important Questions on Separation of Substances

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