Question

Can a mixture of sawdust and water be separated by sedimentation and decantation?

Answer 1

It cannot....because sawdust does not settles down in the container.
We use the process of filtration to separate the above mixture.
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Answer 2

ANSWER:

A mixture of 'sawdust and water' cannot be separated by 'sedimentation and decantation'.

EXPLANATION:

Sedimentation and decantation is the process of separation of solid that is heavier than liquid by pouring out the liquid after the solid is 'settled at the bottom' of the vessel.

The sawdust is no't heavier than liquid so it doesn’t fall to the bottom of vessel in the mixture, hence cannot be separated by sedimentation and decantation. Instead we can use the evaporation technique to separate the sawdust from water.