Seperation And Mixtures
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What can be separated and why
Mixtures can be separated because the have different physical properties
What can sieving do
Sieving can sort substances of different sizes
Solute
Solute is a dissolved substance
Solvent
Something to dissolve another thing
Decanting
Pouring off (separating an insoluble solid from a liquid) (less accurate)
Filteration
Can be used to separate an insoluble solid from a liquid (more accurate)
Evaporation
To separate a soluble solid from a liquid using heat
What is distillation
A process of purifying a liquid compound by heating it into a vapour then condensed back to a liquid
Chromatography
Separate miscible liquids from each other (miscible substances are substances that mix mostly liquids) It is a technique that uses paper to help to separate miscible liquids from each other
Materials
Materials are the chemical substances that make up matter
Properties of metals
Good heat conductor Good electricity conductor Shinny Malleable and ductile High density
Properties of non metals
Poor conductor of heat Poor conductor of electricity Dull Brittle Low density
How do particles get their energy to move
Partials usually get their energy by being heated
Solid
The partials are very close together , they vibrate slowly, they have a fixed volume and have and are tightly packed together, they are not easily compressed this means that the particles are packed so tightly together that we can’t push these particles closer than they already are
Liquid
A substance that is considered a liquid when the particles spread out to take the shape of the container they are in. They have a fixed volume
Gas
A gas is a substance considered a gas when the particles spread out to fully fill the container. They have a lot of energy and move fast