Separation Techniques Flashcards
(12 cards)
What separation technique is used to separate an insoluble solid from a liquid?
Filtration.
Give an example of a mixture separated by filtration.
Sand and water.
What method separates a soluble solid from a solution?
Evaporation (or crystallisation for purer crystals)
Give an example of a mixture separated by evaporation.
Salt from salt water.
What technique separates liquids based on their boiling points?
Simple distillation.
Give an example of a mixture separated by simple distillation.
Water from ink or salt water (to collect pure water.)
What method separates two or more liquids with similar boilings points?
Fractional distillation.
Give an example of a mixture separated by fractional distillation.
Alcohol and water, or crude oil into different fuels.
What technique separates different dyes or pigments in a mixture?
Chromatography
Give an example of a mixture separated by chromatography.
Inks in pen dyes or food colorings.
Why does chromatography work?
Different substances travel at different speeds through the solvent on the paper.
What factors affect how far a substance travels in chromatography?
Solubility and attraction to the paper.
