Question

flow chart of techniques of separation of mixtures ​

Answer 1

Answer:

1 Created by Pinkz

 Process by which the grains are released

from the chaff.

 Done either by hand or by using animals

such as bullocks or camels.

Separation of substances

Methods of Separation

 To isolate substances for analytical purpose.

 To remove undesirable substances.

 To purify substances.

BASIC CONCEPTS – A FLOW CHART

Importance of separation

Separation of a solid from Other Solids

Separating means removing one thing from the other

act of separating one substance from the other.

Sedimentation of

immiscible Liquids

Threshing

 Used to separate heavier and lighter

components from a mixture by wind

or blowing air.

Winnowing

 Undesirable components are just

picked up by hand.

Hand-picking

 Done to separate solid constituents of a

mixture which differ in their sizes.

 A sieve having holes of proper size is used .

Sieving

 A magnet is moved over such a mixture,

the magnetic material sticks to it and is

removed



Magnetic separation.

Separation of Water Soluble Solids

Solubility in water

 The liquid in which solids dissolve is called

solvent.

 The solids that dissolve in liquid is called solute.

 When a solute and a solvent are completely

mixed they form a solution.

 The point at which a solution as a substance can

dissolve no more of that substance is a called

point of saturation.

 The maximum mass of the solute that will

dissolve in 100 grams of the solvent, before the

solution becomes saturated is called the solubility

of the solute in that solvent. Solubility increases

with temperature.

Evaporation

Soluble solids are separated by heating the

solution and condensing the vapours.

Distillation

 Conversion of liquid state into gaseous

state on heating.

 Used to separate dissolved material from

the solvent.

Separation of Insoluble solids

from liquids

Sedimentation

 Allows heavier matter to settle down.

Example: sand, water.

Decantation

 Methods of separating insoluble solids

from liquids.

Loading

 Finer particles are made to settle faster

by dissolving a small quantity of alum.

 Particles form larger aggregates when

loaded with alum.

Filtration

 The liquid that collects in the beaker is

called the ‘filtrate’.

 A physical processing which a particular

mixture (a suspension of a participate in

a liquid solution) is separated into a solid

and a liquid.

Separating funnel

 Mixture of oil and water can

be separated

Centrifugation

 Mixture containing

suspended particles is

rotated at a high speed in a

centrifuge and heavier

particles settle down.

 For Separating cream from

milk.

Churning

 Used for separating lighter

particles of a solid suspended

in a liquid. Example : butter

from curd.

Chapter - 5 : Separation of substances

Answer 2

Answer:

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