Question 6 of 10intermediate💡 UnderstandShort Answer2 marks

In what situations would you use decantation instead of filtration to separate solids from liquids?

Correct Answer

Decantation is used instead of filtration when the solid particles are heavy and settle down quickly at the bottom of the liquid, forming a distinct layer. It is suitable when the solid component is insoluble and denser than the liquid, allowing it to sediment properly.

Decantation is also preferred when complete separation is not critical, as some solid particles may remain in the liquid. This method is simpler, faster, and does not require any filter apparatus.

For example, separating tea leaves from tea by letting them settle at the bottom and then pouring the tea carefully.

Exercise: Let us enhance our learning | Q: 6 | (Page Page 17)
For More Understanding

Explanation

The chapter explains that sedimentation is the process of settling down of heavier insoluble components at the bottom of a liquid, and decantation is when the liquid is removed by tilting the vessel. The example of tea leaves settling at the bottom demonstrates this process. However, the chapter also notes that decantation does not completely separate all particles, which is why filtration using a strainer provides better separation.

Solution Steps

  1. Decantation is used when solid particles are heavy and settle quickly at the bottom.

  2. It is suitable when the solid component is insoluble and denser than the liquid.

  3. It is preferred when complete separation is not critical.

  4. This method is simpler and faster as it does not require filter apparatus.

  5. An example is separating tea leaves from tea.

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