Reactions of the halogens
2 marks · NormalState the colour change you would observe when chlorine gas is bubbled through a solution of potassium iodide.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
The solution changes from colourless to brown.
Also accept: colourless to brown; solution turns brown
Common mistakes: saying yellow or red for colour change
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Correctly describes initial solution as colourless.
B2 · 1 mark · Correctly describes final colour as brown (from iodine).
Worked solution
The solution changes from colourless to brown because iodine is formed.