A student adds halogen solutions to solutions of potassium halides and records what happens.
The table shows the student's results.
| Halogen solution added | Potassium chloride solution | Potassium bromide solution | Potassium iodide solution |
|---|---|---|---|
| chlorine water | not done | turns orange | turns brown |
| bromine water | no change | not done | turns brown |
| iodine solution | no change | no change | not done |
Name the most reactive halogen in the table.
Complete the word equation for the reaction between chlorine and potassium bromide. chlorine + potassium bromide →\rightarrow→ ........ + ........
Explain why there was no change when iodine solution was added to potassium bromide solution.
Give the order of reactivity of chlorine, bromine and iodine. Start with the most reactive.
Astatine is below iodine in group 7. Predict whether astatine would react with potassium iodide solution. Give a reason for your answer.
41 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.