Solution Q is acidic. Solution Q contains one cation and one anion. The tests carried out on Q are shown in Table 3.1. Some observations for these tests are also shown. Describe the expected colour change in test 1.
A gas is released in test 2. Predict one other observation the student would make in test 2.
Predict which gas is produced in test 2.
Describe a test used to confirm this gas’s identity. Include the result of a positive test.
Identify the cation and anion present in Q.
The tests carried out on R are shown in Table 3.2. Some observations for these tests are also shown. Describe how the student carries out a flame test.
Describe one further observation expected in test 5 using the observations in tests 4 and 5 as a guide.
Describe one additional test to confirm the identity of the cation in R. Include the result of a positive test.
Identify the cation present in R.