Water & Water Pollution (Cambridge (CIE) O Level Chemistry): Exam Questions

Exam code: 5070

1 hour20 questions
1a
2 marks

Describe a chemical test to distinguish between each of the following pairs of substances. An example is given potassium chloride and potassium iodide

test: add dilute nitric acid, then aqueous silver nitrate result: potassium chloride gives a white precipitate, potassium iodide gives a yellow precipitate

water and ethanol test ........................................................................................................................... result with water ........................................................................................................................... result with ethanol ...........................................................................................................................

1b
2 marks

sulfuric acid and aqueous sodium sulfate test .................................................................................................................... result with sulfuric acid .................................................................................................................... result with aqueous sodium sulfate ....................................................................................................................