Reaction rates · Grade 10
A catalyst at work
ChemAI · Worksheet
NameClassDate
Aim
Manganese(IV) oxide and hydrogen peroxide.
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Add MnO₂ to tube 1 only. Compare the gas collected in the two measuring tubes. | |
| 2 | Hold a glowing splint at tube 1. | |
| 3 | Try the glowing splint at tube 2 as well. |
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?