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

1. (a)Put 1 cm depth of X into a boiling tube. Add aqueous sodium hydroxide drop by drop until a change is seen. Then add a further 2cm depth of aqueous sodium hydroxide. Record your observations. Keep the mixture for use in (b).[3]
2. (b)Gently warm the mixture from (a) in the boiling tube. Test the gas given off. Describe the test and its result. Identify the gas. test for gas and result ......................................................................................................................................................... ......................................................................................................................................................... identity of gas .........................................................................................................................................................[3]
3. (c)Put 1cm depth of X into a test-tube. Add aqueous ammonia drop by drop until a change is seen. Then add a further 2 cm depth of aqueous ammonia. Record your observations.[2]
4. (d)Identify the two cations in X. ..................................................................................................... and .....................................................................................................[2]
5. (e)Put a piece of magnesium into a test-tube. Add 1 cm depth of solution Y. Record your observations. Test the gas given off. Describe the test and its result. Identify the gas. observations ......................................................................................................................................................... ......................................................................................................................................................... test for gas and result ......................................................................................................................................................... ......................................................................................................................................................... identity of gas .........................................................................................................................................................[4]
6. (f)Put 1 cm depth of Y into a test-tube. Add 1 cm depth of dilute nitric acid. Then add 1 cm depth of aqueous silver nitrate. Record your observations.[1]
7. (g)Identify the cation and the anion in Y. cation ............................................................................ anion ............................................................................[2]