Potassium bromide solution is colourless.
When chlorine water is added to potassium bromide solution, a reaction occurs.
2KBr+Cl2→2KCl+Br2 2\text{KBr} + \text{Cl}_2 \rightarrow 2\text{KCl} + \text{Br}_2 2KBr+Cl2→2KCl+Br2The mixture turns orange.
Give the name of the substance causing the orange colour.
106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.