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(a) What method can be used to separate a mixture of ethanol and propanol?
(b) (i) Explain how a solid mixture of sulphur and sodium chloride can be separated into solid sulphur and solid sodium chloride.
(ii) How can one determine if the solid sulphur is pure?
(c) The table below give the solubilities of potassium bromide and potassium sulphate at #0^0C# and #40^0C#

When an aqueous mixture containing 60g of potassium bromide and 7g of potassium sulphate in
100g of water at #80^0C# was cooled to #0^0C#, some crystals were formed.
(i) Identify the crystals.
(ii) Determine the mass of the crystals formed
(iii) Name the method used to obtained the crystals.
(iv) Suggest one industrial application of the method named in (c)(iii) above.