Transcript SEPARATING MIXTURES

SEPARATING
MIXTURES.
What everyday items can you
think of that need to be
separated and what are the
processes used to complete
these separations?
SIEVING…..
DECANTING….
water supply-upper layer taken for use after
sedimentation
MAGNETIC SEPARATION…
SEPARATING ORES
FROM MINED
EARTH.
GRAVITY SEPARATION…
SEPARATING ORES
GOLD PANNING
EVAPORATION….
SALT FROM SEA WATER…
FILTRATION….
AIR FILTRATION
water supply cleaned of impurities, wine
making-remove skin
DIESEL FILTRATION
HEINEMANN INTERACTIVE P76
Separating Techniques
Use pages 75 & 76 in the text book to fill in the table
Technique Name
Definition
Examples in real life
Sieving
Used to separate small chunks of
ore from larger ones.
Sifting flour,
separating pasta
from water when
cooking
Decanting
Water supply-upper layer taken for
use after sedimentation
Sand in water
Magnetic
separation
SEPARATING ORES FROM MINED
EARTH.
At the tip
Gravity separation When you separate materials
because one is heavier than the
other
Evaporation
Filtration
Separate small particles from a
Now turn to page 82.
liquid
Gold digging
DISTILLATION….
make perfumes from plant
materials, petrol oil
CHROMATOGRAPHY….
Separate colours in food dyes, pesticides in food
Centrifuging….
Blood
products
Wet clothes
oil
Uses for Chromatography.
• Paints, inks dyes and food colourings are often mixtures of
substances that have different colours. These can be
separated using paper chromatography.
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Can detect very small amounts of harmful pesticides in foods
Detect drugs in urine
Separate complex chemicals found in cells of living things
Check composition and purity of chemicals used in industry
Used to make and purify chemicals by manufacturers of
medicines.
SEPARATION TECHNIQUES.