C3
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What is a mixture?
2 or more elements that are not chemically combined
What is an element?
A pure substance made up of one type of atom only
What is an atom?
Smallest part of an element which can be recognised as that element
What is filtration?
Separates substances that are insoluble in a particular solvent from solute
What is chromatography?
When small amounts of dissolved substances are separated by running a solvent along material
What is crystallisation?
Separates a soluble substance from a solvent by evaporation
What is simple distillation?
Separates a soluble substance from a solvent by evaporation
What is fractional distillation?
Separates liquids from a mixture of liquids by boiling of substances at different temperatures and then condensing and collecting liquids
What is a solvent?
The liquid in which a solute dissolves
What is a solute?
The substance that dissolves in a liquid to form a solution
What is a solution?
The mixture formed when a solute has dissolved in a solvent
What does soluble mean?
a substance that would dissolve
What does insoluble mean?
Describes a substance that will not dissolve
What does miscible mean?
liquids that mix together completely
What are immiscible mixtures?
Will form separate layers, e.g., oil + water
What is a compound ?
2 or more elements chemically combined