FB 5 contains one cation and one anion from those listed in the Qualitative Analysis Notes.

1. (a)(i)Transfer a small spatula measure of FB 5 into a hard-glass test-tube. Heat gently at first and then heat strongly, until no further change occurs. Record all your observations.[3]
2. (a)(ii)To a 1 cm depth of dilute hydrochloric acid in a test-tube, add a small spatula measure of FB 5. Record your observations.[2]
3. (a)(iii)Deduce the formula of FB 5.[1]
4. (b)(i)FB 6 is a solution of a compound containing one cation from those listed in the Qualitative Analysis Notes. Carry out the following tests using a 1 cm depth of FB 6 in a test-tube for each test. | test | observations | |-------------------------------------------|--------------| | Add two drops of Universal Indicator solution. | | | Add an equal volume of aqueous manganese(II) chloride. | | | Add an equal volume of dilute sulfuric acid. | | | Add a few drops of aqueous silver nitrate, then | | | add aqueous ammonia. | | | Add a few drops of aqueous copper(II) sulfate, then | | | add excess dilute hydrochloric acid. | |[4]
5. (b)(ii)What can be determined about FB 6 from its reaction with manganese(II) chloride?[1]
6. (b)(iii)Give the ionic equation for the reaction between FB 6 and sulfuric acid. Include state symbols.[1]
7. (b)(iv)When aqueous copper(II) sulfate was added to FB 6, two precipitates were formed. Deduce the identity of the two precipitates. ...................... and ...................... Explain the observation you made when you added excess dilute hydrochloric acid in the final test of (b)(i).[2]