Separation of substances

SEPARATION OF SUBSTANCES

WHAT IS SEPARATION?

1) SEPARATING STONES FROM RICE.2) SEPARATING TEA FROM TEA LEAVEES.3) SEPARATING CHAFF FROM THE GRAINS

SEPARATION MEANS REMOVAL OF

SUBSTANCES FROM A MIXTURE OF

TWO OR MORE SUBSTANCES

WHY DO WE SEPARATE SUBSTANCES?TO OBTAIN TWO DIFFERENT, BUT USEFUL

COMPONENTS..

TO REMOVE NON-USEFUL COMPONENTS.

TO REMOVE IMPURITIES OR HARMFUL COMPONENTS.

TO GROUP SUBSTANCES OF DIFFERENT SIZES.

METHODS OF SEPARATION

THRESHING

USED FOR SEPARATING GRAINS FROM STALKS.

MACHINES CAN ALSO BE USED FOR THE

PROCESS.

WINNOWING

USED TO SEPARATE HEAVIER AND LIGHTER

COMPONENTS OF A MIXTURE.

HAND-PICKING

USED FOR SEPARATING LARGE SIZED

IMPURITIES LIKE STONES AND HUSK FROM RICE, WHEAT,

PULSES.

SIEVINGUSED FOR WHEN

COMPONENTS OF A MIXTURE HAVE

DIFFERENT SIZES.

OTHER METHODS OF SEPARATION

• SEDIMENTATIONSEPARATION OF 2 COMPONENTS

IN SUCH A WAY THAT HEAVIER

SUBSTANCES SETTLE DOWN.LIGHTER LIQUID

HEAVIER SUSTANCE

• DECANTATION THE PROCESS OF POURING OUT THE

CLEAR UPPER LIQUID WITHOUT

DISTURBING THE SEDIMENTS.

PURE WATER

• FILTRATION

SEPARATION OF SOLIDS FROM LIQUIDS EITHER BY USING A FILTER PAPER OR STRAINER. FOR

EXAMPLE: SEPARATING TEA FROM TEA LEAVES WE USE A STRAINER OR SEPARATING MUD FROM

WATER WE USE A FILTER PAPER.

• EVAPORATION

EVAPORATION IS USED WHEN WE WANT TO GET A SUBSTANCE THAT HAS BEEN DISSOLVED.

EXAMPLE: GETTING SALT OUT OF SALTY WATER.THE SALTY WATER IS PUT INTO A EVAPORATING BASIN. IT IS LEFT IN A WARM PLACE AND WATER

EVAPORATES LEAVING BEHIND THE SALT CRYSTALS.

• CONDENSATION

CONDENSATION IS THE PROCESS BY WHICH A SUBSTANCE CHANGES FROM GAS PHASE TO

THE LIQUID PHASE.

WATER VAPOUR CONDENCES INTO LIQUID WATER AFTER MAKING CONTACT WITH THE SURFACE OF A COLD BOTTLE.

CAN WATER DISSOLVE ANY AMOUNT OF SUBSTANCE?

WATER DISSOLVES DIFFERENT AMOUNT OF SOLUABLE SUBSTANCE

[SUGAR] IN IT.

A SATURATED SOLUTION IS ONE IN WHICH NO MORE OF

THAT SUBSTANCE CAN BE DISSOLVED.

BY: JERRY ROZARIOVI A