Rocks and metals · Grade 10
Thermal decomposition
ChemAI · Worksheet
NameClassDate
Aim
Heat green copper carbonate (like the mineral malachite).
Before you start: what do you predict will happen? Why?
What you do
| Step | What I observed | |
|---|---|---|
| 1 | Heat the dry tube strongly. | |
| 2 | Test the gas with limewater. | |
| 3 | Keep heating until all the green powder has turned black. |
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?