Seperating Mixtures Flashcards
Physical change
No change in particles, just the particles arrangement and energy, easy to reverse e.g. mixing water and salt
Chemical changes
A chemical reaction takes place and a new substance is formed, very difficult to reverse e.g. burning a match.
During a chemical reaction
The atoms rearrange to form a new substance. Might be seen by colour change, temperature change, light being emitted or bubbles.
Law of conservation of mass
Matter can be changed from one form to another. During physical and chemical changes, there is no overall change in mass.
Particle model diagrams
Water example done in book, do copper oxide
Distillation
Used to separate small insoluble solids (do not dissolve in a liquid) from a liquid by using filter paper and a funnel to trap the solids. E.g. sand and water.
Chromatography
Used to separate soluble solids (dissolve in liquids) from a solution by evaporating off the liquid to leave the solids. E.g. salt water.
Mixture
Consists of two or more substances mingled together but not chemically combined.
Filtration
Used to separate an insoluble solid and a liquid
Insoluble
Does not dissolve in a liquid
Soluble
Dissolves in a liquid
Residue
The soil left in the filter paper after filtration
Filtrate
The clean water that comes after
filtration
Evaporation
Used to separate a soluble solid from a liquid e.g. salt and water
Solvent
The liquid that a solid is dissolved into
