Describe how to carry out a flame test on solution P to confirm this cation.
Solution P contains an anion made of nitrogen and oxygen. Describe a test to identify the anion in solution P. Include test, observations and identity of anion.
Identify the cation in solution Q from the observations in tests 1 and 2.
Describe what further action is needed in test 3 so that the white precipitate observed gives a valid conclusion about the anion in solution Q.
When test 3 is done correctly, the observation remains unchanged. Identify an anion in solution Q.
The ion identified in (iii) is the only anion present in solution Q. Describe the observation expected in test 4.
Solution Q is acidic. Describe the observation that occurs when sodium carbonate is added to solution Q.