states of matter
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solid to a liquid
melting
Gas to a liquid
condensation
particles in a solid
vibrate about a fixed position
property of gas
compressible
Why do solids have a fixed shape?
The particles are not free to move around
property of a liquid
can not be squashed
Liquid to a gas
evaporation
What is room temperature?
20 degrees Celsius
property of a solid
Does not flow
melting point of water
0 degrees Celsius
solid to gas
Sublimation
What is a mixture?
Two or more substances mixed together but not chemically bonded
What does chromatography do?
Separates mixtures
What technique could be used to separate sand from water?
Filtration
What is distillation?
Evaporation followed by condensation
In filtration what is the bit left behind on the filter paper called?
Residue
What technique would be used to separate two liquids?
Distillation
What is the role of the condenser in fractional distillation?
To cool the vapours so they turn back to a liquid
What is a substance that has been dissolved in a liquid called?
Solute
How is the Rf value calculated on paper chromatography?
Distance moved by spot divided by distance moved by solvent