Flashcards
seperating mixtues
Cards in this deck (8)
- 1fractional distillationfractional distillation is when lots of liquids that we use like petrol are separated from one another.
- 2fractional distillation: how does it work?The liquids get separated by having different boiling points. For example; some liquids like gasoline(petrol) has a high boiling point so it comes out at the top, but fuel oil for ships and power stations comes out at the bottom as it has a low boiling point.
- 3what does fraction mean?Fraction is when there's molecules with a similar boiling point.
Side note: hydrocarbons= long chain molecules found in crude oil. - 4Filtration: What's it about?Filtration is when you have a mixture (mixture is a substance that contains two or more substances), which contains a solid in it and you have to separate them from the solid to just have the pure substance.
- 5Filtration: how to separate a solid from a liquid?Filtration only works when the solid can't dissolve in the liquid. You will use a glass funnel and filter paper to separate your solid from the liquid, you'll also need a beaker or a small container to collect the filtered water at the end. You'll slowly start pouring the mixture in and be patient for it to separate.
- 6Crystallisation: what does it do?Crystallisation separates solids that have dissolved(solutes) in a liquid (solvent)
- 7Crystallisation: how does it work?Crystallisation is done carefully and you also have to be very patient with it. You'll have to use a bunsen burner to heat up the solution so that the liquid can evaporate and leave crystals of the solid behind.
Side note: the better filtrated the water is, then bigger the crystals. - 8Distillation: what is it?Distillation is when you heat up water and ethanol solution, which then makes the pure vapour rise up ( whilst its rising up the themometer measures its boiling point), then it goes through the consender were the warm water is let out and the cold water comes in and then it drips out at the end into the the beaker, that's when you have your pure consendate ( water).
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- Year 8 Chemistry Flashcards on seperating mixtues, created by Amelia Papierzynska on 09/10/2018.
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- Amelia Papierzynska
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