separation of substances
TRANSCRIPT
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SEPARATION OF SUBSTANCES
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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
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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.
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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.
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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.
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OTHER METHODS OF SEPARATION
• SEDIMENTATIONSEPARATION OF 2 COMPONENTS
IN SUCH A WAY THAT HEAVIER
SUBSTANCES SETTLE DOWN.LIGHTER LIQUID
HEAVIER SUSTANCE
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• DECANTATION THE PROCESS OF POURING OUT THE
CLEAR UPPER LIQUID WITHOUT
DISTURBING THE SEDIMENTS.
PURE WATER
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• 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.
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• 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.
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• 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.
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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.
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BY: JERRY ROZARIOVI A