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Separation of mixtures: chromatography, filtration, distillation
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- 1Which are harder to separate? Compounds or mixtures?Mixtures - not chemically bonded together
- 2What is chromatography?A method of separation
- 3How do you carry out paper chromatography?1) Draw a line along the bottom of your paper in pencil
2) Add dots of ink along the bottom line
3) put the paper in a beaker full of a solution e.g. water
4) Make sure the ink isn't touching the water]
6) Put a lid on the beaker
7) The ink will spread up the paper at different rates, creating a pattern - 4What is the end pattern called in chromatography?A chromatogram
- 5What does filtration do?Separates insoluble solids from liquids
- 6Give a step by step guide of evaporation1) Heat the solution in an evaporating basin. The solvent will start to evaporate
2) Heat until you see crystals appear
3) Keep heating until everything is crystals - 7Give a step by step guide of crystallization1) Heat the solution in an evaporating basin
2) Heat until you see crystals or until all the solution is evaporated
3) leave to cool
4) more crystals should start being made - 8What is rock salt?A mixture of salt and sand
- 9True or false- only evaporation can separate rock saltFalse- both evaporation and crystallization can separate rock salt
- 10Give a step by step guide on simple distillation1) used to separate liquids from a solution
2) Solution is heated, with the part with the lowest boiling point evaporating first
3) vapour is then cooled, condensed and collected
4) Rest is left in a flask - 11How can you use simple distillation?To separate salt water and pure water
- 12What is one negative of simple distillation?
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- Fichas sobre Sin título, creado por Emily Mawson el 19/11/2018.
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- Emily Mawson
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