Title: Physical or Chemical Change ( Heating ZnO )
Hypothesis: I have no clue
Equipment: Sample of ZnO (Zinc oxide)
- Heat Source - Hot plates
- Scales
- Heat proof container - Evaporating dish
- Tongs
- Heat proof mat
Method:
1. Get sample of ZnO in an evaporating.
2. Weigh the ZnO and Container - Record weight.
3. Heat container and ZnO on hot plate.
4. Observe any changes - Use phone for before and after photos. (video)
5. Take off heat and put on heat proof mat.
6. Let cool - observe - photos.
7. Re weigh.
Results: The powder had changed into a light green colour when the heat started getting hotter. I think this is a chemical change because the colour changed and it cannot be reversed. The weigh of our powder before was 36g, then changed to 35g during the heating process.
Conclusion: At the end the experiment was good and I didn't have an hypothesis.
