Chemistry 5070 · O Level · Separation and purification
Separation and purification — practice question
Q consists of solid magnesium oxide mixed with solid barium sulfate.
Magnesium oxide does not dissolve in water. When it reacts with dilute hydrochloric acid, a solution of magnesium chloride is produced.
Barium sulfate does not dissolve in water and does not react with dilute hydrochloric acid.
(main)[6]
Plan an investigation that will separate Q into pure magnesium chloride crystals and pure barium sulfate solid. Your plan should set out the apparatus required, how to make magnesium chloride solution, how to collect pure magnesium chloride crystals, how to isolate pure barium sulfate solid, and how you would check that the barium sulfate is pure.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A filter funnel, filter paper and a suitable container such as a conical flask or beaker” …