What is a ‘mixture’?
A combination of two or more substances that retain their individual properties.
What is ‘filtration’?
A method used to separate solids from liquids using a filter.
True or false: Distillation separates mixtures based on boiling points.
TRUE
Distillation is commonly used for purifying liquids.
Fill in the blank: Evaporation is used to separate _______ from a solution.
solvent
What is sieving?
A method to separate particles based on size using a sieve.
True or false: Magnetic separation can be used for all mixtures.
FALSE
It only works for mixtures containing magnetic materials.
What is the purpose of crystallization?
To separate and purify a solid from a solution by forming crystals.
True or false: Filtration can separate dissolved substances from liquids.
FALSE
Filtration separates solids from liquids, not dissolved substances.
What is the main principle of fractional distillation?
To separate mixtures into their components based on different boiling points.
What is ‘distillation’?
A method to separate liquids based on two boiling points.
What is ‘magnetic separation’?
A method to separate ferromagnetic materials from non-ferromagnetic materials with a magnet.
What is ‘chromatography’?
A method to separate mixtures of soluble substances (usually of different colours)
What is ‘electrolysis’?
A method to separate the elements in a stable compound that is a liquid or plasma with electricity.
What does a pure substance leave on a chromatogram?
One spot
How is Rf calculated?
The distance travelled by the substance divided by the distance travelled by the solvent.
