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Chap 5: Separation of Substances: 6 (CBSE) Future Group Tuitions Science

This document discusses various methods for separating substances from mixtures, including separating solids from other solids through sieving or magnetic separation, separating water soluble solids through evaporation or condensation, and separating insoluble solids from liquids using sedimentation, decantation, filtration, or centrifugation. Key separation techniques are sieving to separate solid constituents by size, sedimentation to allow heavier matter to settle, and filtration to separate liquids from solids that collect in a beaker.

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Swapnil Chaudhari
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51 views2 pages

Chap 5: Separation of Substances: 6 (CBSE) Future Group Tuitions Science

This document discusses various methods for separating substances from mixtures, including separating solids from other solids through sieving or magnetic separation, separating water soluble solids through evaporation or condensation, and separating insoluble solids from liquids using sedimentation, decantation, filtration, or centrifugation. Key separation techniques are sieving to separate solid constituents by size, sedimentation to allow heavier matter to settle, and filtration to separate liquids from solids that collect in a beaker.

Uploaded by

Swapnil Chaudhari
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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6th (CBSE) FUTURE GROUP TUITIONS SCIENCE

CHAP 5: SEPARATION OF SUBSTANCES

 Handpicking, winnowing, sieving, sedimentation, decantation and filtration are some of


the methods of separating substances from their mixtures.
 Methods of separation:
o Separation of solid from other solids:
1) Threshing: Process by which the grains are released from the chaff.
2) (b)Winnowing: The process of separation of heavier and lighter components of a
mixture by wind or blowing air.
3) Hand-picking: The process by which undesirable components are just picked up
by hand.
4) Sieving: The process by which separate solid constituents of a mixture which
differ in their sizes.
5) Magnetic separation: Process by which magnet is moved over such a mixture,
the magnetic material sticks to it and is removed.
o Separation of water soluble solids:
1) Evaporation: Process by which the conversion of liquid state into gaseous state
on heating.
2) Condensation: Process by which conversion of gaseous state into liquid state on
cooling.
o Separation of insoluble solids from Liquids:
1) Sedimentation: It allows heavier matter to settle down. Example: sand, water.
2) Decantation: The methods of separating insoluble solids from liquids.
3) Loading: The methods by which finer particles are made to settle faster by
dissolving a small quantity of alum.
4) Filtration: The liquid that collects in the beaker is called filtrate.
o Separation of Immiscible Liquids:
1) Funnel: The method of separating mixture of oil and water.
2) Centrifugation: The method in which mixture containing suspended particles is
rotated at a high speed in a centrifuge and heavier particles settle down. It is
used for separating cream from milk.

Future Group Tuitions 1


6th (CBSE) FUTURE GROUP TUITIONS SCIENCE
CHAP 5: SEPARATION OF SUBSTANCES

3) Churning: The method which is used for separating lighter particles of solid
suspended in a liquid. Example: butter from curd.
 Husk and stones could be separated from grains by handpicking.
 Husk is separated from heavier seeds of grain by winnowing.
 A saturated solution is one in which no more of that substance can be dissolved.
 More of a substance can be dissolved in a solution by heating it.
 Water dissolves different amount of soluble substances in it.

Future Group Tuitions 2

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