(Heating ZnO)
Hypothesis - I think there will be a color change
Equipment:
sample of ZnO
Hot plate
scales
Heatproof container/ evaporating dish
Tongs
Heatproof mat
Method-
1.Get a sample of ZnO in an evaporating dish
2.weigh ZnO and container - recored weight
2.heat container and ZnO on a hot plate
3.observe any changes take any before and after photos
4.place of heat and put on a heatproof mat
5.let it cool -see what happens
6.Reweigh
Results- the color of the ZnO turns a slight yellow color when the ZnO was heated and when it cooled down it changed back to the same color and the weight did not change therefore this is a physical change.
Conclusion - My hypothesis was right the ZnO did change color.
was your hypothesis right?
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