Seperating Mixtures Flashcards
Physical change
No change in particles just the particle arrangement and energy, easy to reverse e.g. mixing water and salt
Chemical change
A chemical reaction takes place and a new substance is formed, very difficult to reverse e.g. burning a match.
During a chemical change
The atoms rearrange to make a new substance. Might be seen by colour change , temperature change, light being emitted or bubbles.
Law of conversation of mass
Matter can be changed from one form to another. During chemical and physical changes, there is no overall changes in mass.
Filtration
Used to separate small insoluble solids from liquid by using filter paper and a funnel to trap the solids
Evaporation
Used to separate soluble solids from a solution by evaporating off the liquid to leave the solids. E.g. water and salt
Distillation
Used to separate two liquids with different boiling points such as alcohol and water. Also used to separate a soluble solid from a liquid to give a pure sample of each
Chromatography
Used to separate a mixture of dissolved substances in a solution e.g. the different colours in a black marker
Insoluble
Does not dissolve in liquid
Soluble
Dissolves in liquid
Residue
The soil left in the filter paper after filtration
Filtrate
The clean water that comes after filtrate
Solvent
The liquid that a solid is dissolved into
Solute
The solid that is left behind after evaporation
Miscible
Liquids that mix together e.g water and alcohol
