Identifying substances · Grade 9
Making oxygen by heating
ChemAI · Worksheet
NameClassDate
Aim
Heat potassium permanganate and test the gas.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Heat the dry tube strongly. Oxygen bubbles into the upside-down tube and pushes the water down. | |
| 2 | Test the gas with a glowing splint. |
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?