Chlorine, bromine, and iodine are separately dissolved in water to make aqueous solutions. Potassium bromide solution is added to a sample of each of these solutions.
Table 1 shows the observations.
Table 1
| Halogen dissolved in water | Initial colour of aqueous solution | Final colour of mixture |
|---|---|---|
| Chlorine | Pale green | Orange |
| Bromine | Orange | Orange |
| Iodine | Brown | Brown |
Explain the observations shown in the table.
Practise Edexcel GCSE Chemistry Group 7 with exam-style questions for Foundation and Higher tier. 77 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
