separation of substances
Post on 10-Apr-2017
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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
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