Two unlabelled bottles, P and Q, each contain a colourless aqueous solution of a single sodium salt.
A student carries out qualitative tests to identify the anion in each solution. The observations are recorded in Table 1.
Table 1
| Test | Observation with solution P | Observation with solution Q |
|---|---|---|
| Add dilute hydrochloric acid, then add barium chloride solution | Dense white precipitate formed | No visible change |
| Add dilute nitric acid, then add silver nitrate solution | No visible change | Pale yellow precipitate formed |
The anions in solutions P and Q can be identified from the results of the tests shown in Table 1.
Draw one straight line from each solution to the correct anion present. Solution
Anion
Practise Edexcel GCSE Chemistry Qualitative analysis: tests for ions with exam-style questions for Foundation and Higher tier. 127 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
