The periodic table · Grade 10
Halogen displacement
ChemAI · Worksheet
NameClassDate
Aim
Which halogen pushes out which? Cl₂, Br₂ and I₂.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Add chlorine water to tube 1 (KBr). | |
| 2 | Add chlorine water to tube 2 (KI). | |
| 3 | Add bromine water to tube 3 (KI). | |
| 4 | Add bromine water to tube 4 (KCl). Does anything happen? | |
| 5 | Bonus: add starch to tube 2 to confirm the iodine. |
Questions
- Write a word or symbol equation for one reaction you observed.
- Explain your most important observation using particles, ions or energy.
- Was your prediction right? What would you change to get a more reliable result?