A quality-control technician at a chemical supplier checks a container labelled iron(II) chloride. The solution is divided between two test tubes. A few drops of sodium hydroxide solution are mixed with the first sample. The second sample is acidified with dilute nitric acid before silver nitrate solution is added.
Which pair of observations should the technician obtain?
An orange-brown precipitate, and a white precipitate
A green precipitate that slowly turns orange-brown, and a cream precipitate
A green precipitate that slowly turns orange-brown, and a white precipitate
A blue precipitate, and a white precipitate
107 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.