You are provided with solid Y and solution Z. Do the following tests on each substance, recording all of your observations at each stage. Tests on solid Y

1. (a)Put the sample of Y in a boiling tube and use a measuring cylinder to add 8 cm³ of dilute nitric acid. Record your observations. Test the gas given off. Describe the test and its result. Identify the gas. Keep the mixture for use in (b) and (c).[4]
2. (b)Use a measuring cylinder to transfer 2cm³ of the mixture from (a) into a boiling tube. Add aqueous sodium hydroxide drop by drop until a change is seen. Then add more aqueous sodium hydroxide until a further change is seen. Record your observations.[3]
3. (c)Use a measuring cylinder to transfer 2cm³ of the mixture from (a) into a boiling tube. Add aqueous ammonia drop by drop until a change is seen. Then add more aqueous ammonia until a further change is seen. Record your observations.[2]
4. (d)Identify the cation and the anion in Y. cation ..................................................................... anion .....................................................................[2]
5. (e)Tests on solution Z Put 1 cm depth of Z into a boiling tube. Add 1 cm depth of aqueous sodium hydroxide. Gently warm the mixture. Test the gas given off. Describe the test and its result. Identify the gas. Keep the mixture for use in (f).[3]
6. (f)Add 3 cm depth of dilute nitric acid to the mixture from (e). Then add 1 cm depth of aqueous silver nitrate. Record your observations.[1]
7. (g)Identify the cation and the anion in Z. cation ..................................................................... anion .....................................................................[2]