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There are different ways to separate mixtures, eg by filtration, crystallisation, distillation or chromatography. The method chosen depends upon the type of mixture.
Which piece of apparatus holds the filter paper during filtration?
What is the name of the solid that collects in the filter paper during filtration?
How can the crystallisation process be changed to make larger crystals?
Make the solution hotter
Cool the solution rapidly
Cool the solution more slowly
What is the correct order for obtaining copper(II) sulfate from a mixture of solid copper(II) sulfate and sand?
Dissolve in water - filter - evaporate
Dissolve in water - evaporate - filter
Filter - dissolve in water - evaporate
When air is cooled, the mixture of gases in it will liquefy. Which process can be used to separate liquid oxygen from liquid air?
Which of these is the correct expression for finding an Rf value?
Distance moved by spot ÷ distance moved by solvent
Distance moved by solvent ÷ distance moved by spot
Distance moved by spot ÷ 2
How many spots are produced on the chromatogram of a pure substance?
A solution contains a number of dissolved solids. Which process is used to separate the solids from each other?
Which method of separation can be used to separate water from sea water?
Why is it important to use an electric heater when heating a mixture of ethanol and water?
It is cheaper than using a Bunsen Burner
Ethanol is harmful
Ethanol is flammable