Separating mixtures

• A mixture is 2 or more elements or compounds that are not chemically combined together.
• Filtration (e.g sand +water) due to the sand being insoluble you are able to separate it using filter paper which only water can get through.
• Evaporation: the process of turning from liquid into vapour. (e.g salt + water) You heat up salt and water , eventually the water will turn into vapour just leaving the salt behind.
• Distillation- 2 liquids which have different boiling points.
• Chromatography: a technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.(e.g inks)
• rf value= distance moved by colour/ distance moved by solvent