What everyday items can you think of that need to be separated and what are the processes used to complete these separations?
FILTRATION….
DIESEL FILTRATION
AIR FILTRATION
HEINEMANN INTERACTIVE P76
water supply cleaned of impurities, wine making-remove skin
Separating TechniquesUse 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
Gold digging
Evaporation
Filtration Separate small particles from a liquid
Now turn to page 82. Answer in sentences Q1, 2 and 4 (turn back to p 75/6 or the table above)
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.
• 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.