Organic chemistry · Grade 11
Alkane or alkene? Bromine water
ChemAI · Worksheet
NameClassDate
Aim
Bromine water shows whether a C=C double bond is present.
⚠ Bromine water is toxic and the hydrocarbons are flammable: no flames nearby.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Add hexane (an alkane) to tube 1 and look at both layers. | |
| 2 | Add cyclohexene (an alkene) to tube 2. |
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?