A student adds sodium hydroxide solution to two solutions, X and Y.
Solution X gives a blue precipitate. Solution Y gives an orange-brown precipitate.
What are solutions X and Y?
X is copper(II) sulfate and Y is iron(II) chloride.
X is iron(II) sulfate and Y is iron(III) chloride.
X is iron(III) sulfate and Y is copper(II) chloride.
X is copper(II) sulfate and Y is iron(III) chloride.
52 exam-style questions on OCR GCSE Chemistry 4.2 Identifying the products of chemical reactions, covering 4.2.1 Tests to identify gases, 4.2.2 Tests for aqueous ions and flame tests, and 4.2.3 Instrumental methods of analysis. Each one has a worked solution and a mark scheme showing where the marks go.