A solution contains both iron(III) ions and aluminium ions. A student adds sodium hydroxide solution until it is in excess, stirs, and then filters the mixture.
What is left on the filter paper, and where are the aluminium ions?
A red-brown solid; the aluminium is in the filtrate
A white solid; the aluminium is in the white solid
A green solid; the aluminium is in the filtrate
Red-brown and white solids; the aluminium is in the solids
35 exam-style questions on Edexcel GCSE Chemistry 10.1 Qualitative analysis: tests for ions, covering 10.1.1 Principles of ion tests and flame tests, 10.1.2 Tests for cations and for ammonia, 10.1.3 Tests for anions, 10.1.4 Identification of ions in unknown salts, and 10.1.5 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.