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Separating mixtures

Revision for Year 7 test

QuestionAnswer
What is a solvent? A substance, normally a liquid, that dissolves another substance.
What is a solute? A substance that can dissolve in a liquid.
What does 'dissolve' mean? When a solute mixes completely with a solvent.
What is a solution? Mixture formed when a solvent dissolves a solute.
What does soluble mean? Property of a substance that will dissolve in a liquid.
What does solubility mean? Maximum mass of solute that dissolves in a certain volume of solvent.
What is a pure substance? Single type of material with nothing mixed in.
What is a mixture? Two or more pure substances mixed together, whose properties are different to the individual substances.
What is filtration? Separating substances using a filter to produce a filtrate (solution) and residue.
What is distillation? Separating substances by boiling and condensing liquids.
What is evaporation? A way to separate a solid dissolved in a liquid by the liquid turning into a gas.
What is chromatography? Used to separate different coloured substances.
How does temperature affect solubility? It increases it.
What is a compound? At least two or more different types of atom chemically bonded.
What is a mixture? Different types of atoms and compounds together that are not chemically bonded.
What is a solution? The dissolved solute and solvent mixed together.
What does a pure substance have? A fixed melting and boiling point.
Why do we use salt on the roads and pavements in the winter? To lower the melting/freezing point so that ice will melt at a lower temperature.
 

 



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