Group 2 compounds and their usesAQA A-Level Chemistry: Mind map

Exam questions on Group 2 compounds and their uses

1. Magnesium hydroxide is sparingly soluble in water. Group 2 hydroxides are used in medicine and in agriculture.
   Write an equation for the reaction of magnesium hydroxide with hydrochloric acid in the stomach, and explain how this relieves indigestion.2 marks
2. A student tests three colourless solutions, sodium sulfate, sodium carbonate and sodium chloride, by adding acidified barium chloride solution to a sample of each.
   Explain why the barium chloride solution is acidified when testing for sulfate ions.2 marks
3. A coal-fired power station removes sulfur dioxide from its flue gases using calcium compounds. Relative atomic masses: Ca 40.1, C 12.0, S 32.1, O 16.0.
   Calcium oxide reacts with sulfur dioxide in the flue gases. Write an equation for this reaction and explain why the reaction takes place and why the sulfur dioxide must be removed.3 marks