Answer Happy

Separation techniques are used to isolate a compound from a mixture. a) You are working in a laboratory and have the following techniques available to you: • Recrystallisation • Vacuum filtration Liquid-liquid separation (solvent extraction) • Fractional distillation • Decanting Centrifuging Simple distillation • Evaporation • lon exchange . Identify the most suitable technique for separating the following substances: (Note that you can select a technique more than once.) i) ii) iii) iv) Solid potassium chloride from an aqueous solution of potassium chloride. Pure water from lemonade. Hexane from crude oil. Kerosene oil and water. (4 marks)