Your teacher asked you to use your knowledge of precipitation reactions to test the quality of water in the local river.
You are provided with the following chemicals:
AgNO3, BaCl2, dilute HNO3
8.1 Which chemical would you choose to test for the presence of carbonates (CO3-2)? (1)
8.2 Use a balanced chemical equation to show the test for carbonates in QUESTION 8.1. (4)
8.3 Both carbonates and sulphates form a white precipitate with the chemical in QUESTION 8.1. Use a balanced chemical equation to explain how you would confirm that the precipitate is a carbonate. (4)
8.4 Give the chemical name of the precipitate formed when the carbonate and the chemical in QUESTION 8.1 reacts. (2)