One step in the method for test $1$ is missing. Describe the missing step in the method that is needed to produce the observations shown.
The observations for test $1$ are not complete. State one additional observation made in test $1$.
Suggest why the ammonia produced in test $2$ does not affect the litmus paper.
Solution $\textbf{X}$ contains two cations. Identify the cation in solution $\textbf{X}$ that produces ammonia in test $2$.
Explain why the student cannot identify the second cation in solution $\textbf{X}$ from the tests and observations in Table 3.1.
Identify the anion in $\textbf{X}$.
The student places universal indicator into solution $\textbf{Y}$ in a test-tube. The universal indicator becomes red. Identify the cation present in $\textbf{Y}$.
The student puts a piece of magnesium ribbon into $\textbf{Y}$. Hydrogen is given off. Suggest two observations the student makes.
Describe how the student tests the gas to show that it is hydrogen. test ........................................... observation if hydrogen present ...........................................
The student adds dilute nitric acid, then aqueous silver nitrate, to $\textbf{Y}$. A white precipitate is seen. Identify the anion present in $\textbf{Y}$.
Identify $\textbf{Y}$.