Qualitative Analysis For each test you should record all your observations in the spaces provided. Examples of observations include: • colour changes seen • the formation of any precipitate and its solubility (where appropriate) in an excess of the reagent added • the formation of any gas and its identification (where appropriate) by a suitable test. You should record clearly at what stage in a test an observation is made. Where no change is observed you should write 'no change'. Where reagents are selected for use in a test, the name or correct formula of the element or compound must be given. If any solution is warmed, a boiling tube must be used. Rinse and reuse test-tubes and boiling tubes where possible. No additional tests should be attempted. FA 5 contains one cation and one anion, both of which are listed in the Qualitative analysis notes. FA 5 is insoluble in water.

1. (a)Transfer approximately half of the sample of FA 5 into a hard-glass test-tube. Heat the test-tube gently at first, then more strongly, until no further change occurs. Record all your observations.[2]
2. (b)FA 6 is an aqueous solution containing one cation and one anion. The anion is listed in the Qualitative analysis notes. FA 6 does not contain sulfur.
3. (b)(i)To a 2 cm depth of FA 6 in a test-tube, add a piece of magnesium ribbon. Record all your observations.[2]
4. (b)(ii)Write an ionic equation for the reaction between FA 6 and magnesium. Include state symbols.[1]
5. (c)(i)Add a small spatula measure of FA 5 to a 2 cm depth of FA 6 in a boiling tube. Record all your observations. The product of this test is FA 7. Label the boiling tube FA 7.[1]
6. (c)(ii)To a 1 cm depth of FA 7 in a test-tube, add aqueous ammonia. Record all your observations.[1]
7. (d)(i)The same anion is present in both FA 6 and FA 7. The identity of this anion can be confirmed by testing either FA 6 or FA 7 with a pair of reagents. Select two pairs of reagents which may be used to identify the anion present in both FA 6 and FA 7. first pair of reagents: .............................................. and .............................................. second pair of reagents: .............................................. and ..............................................[2]
8. (d)(ii)Use FA 6 to carry out each test using the two pairs of reagents you have selected. Record all your observations in a suitable form below.[2]
9. (e)Use your observations in (a) to (d) to identify the ions present in FA 5 and FA 6. If you are unable to identify an ion write 'unknown'. cation anion FA 5 FA 6[2]