A student is provided with two unlabelled test tubes. One test tube contains a solution of aluminium ions, Al3+\text{Al}^{3+}Al3+, and the other contains a solution of iron(III) ions, Fe3+\text{Fe}^{3+}Fe3+.
Describe what is observed when sodium hydroxide solution is added, dropwise until in excess, to each test tube.
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.
