Reactions of metal ions with hydroxide, ammonia and carbonateAQA A-Level Chemistry: Mind map

Exam questions on Reactions of metal ions with hydroxide, ammonia and carbonate

1. A technician has four unlabelled bottles of aqueous solution. They contain copper(II) sulfate, iron(II) sulfate, iron(III) chloride and aluminium nitrate. She adds sodium hydroxide solution dropwise to a sample of each, and then in excess, and records the observations.
   Write equations to show that aluminium hydroxide is amphoteric.2 marks
2. A student adds aqueous ammonia dropwise to copper(II) sulfate solution. A pale blue precipitate forms. When more ammonia is added the precipitate dissolves, giving a deep blue solution.
   Write an equation for the formation of the pale blue precipitate and state the role of ammonia in this reaction.2 marks
3. A student adds sodium carbonate solution to separate samples of iron(II) sulfate solution and iron(III) sulfate solution of the same concentration.
   Describe the observations made with each solution.3 marks