separating mixtures. Flashcards
what do mixtures consist of?
2 or more elements or compounds which aren’t chemically combined.
what do the compounds of a mixture do?
retain their own properties.
how can mixtures be separated?
physical process.
examples of physical process to separate a mixture?
filtration.
crystallisation.
simple distillation.
fractional distillation.
chromatography.
what is filtration and an example?
separate soluble solids from insoluble solids.
mixture of salt ( soluble) and sand ( insoluble) by dissolving the salt in water then filtering the mixture.
what is crystallisation, an example and steps on how to do it?
obtain a soluble solid from a solution.
salt crystals can be obtained from a solution of salty water.
1) the mixture is gently warmed.
2) water evaporates leaving the crystals of pure salt.
what is simple distillation?
used to obtain a solvent from a solution.
what is fractional distillation?
separate mixtures in which the components have different boiling points.
what is chromatography?
separate different soluble coloured components of a mixture.
