A technician needs to determine the concentration of lead ions in a sample of water

Question

a) Suggest a test chemical that can be added to the water sample to preciitate the lead ions. Show a chemical euation for the formation of the precipitate

b) after a precipitate forms, it is filtered and the mass of the dry precipitate is measured. This informationis used to determine the concentrationof lead. Comment on the accuracy of the test. Suggest and explain a potential source of error

Answer 1

Do you know where to start? What do you not understand?

Answer 2

I do not know where to start with this question. How can i find a substance that will form a precipitae with the lead. Could you suggest one and the possible formula