(a–d)[8]
Complete the table by inserting the observations for tests (a), (b) and (c), together with both the test and the observation for (d).
(e)[1]
Final conclusion: L has the formula [BLANK].
(f)[1]
Looking at test (c)(ii), what difference would you observe if $\text{Zn}^{2+}$ ions were present instead of $\text{Al}^{3+}$ ions?