A.I.M: Exploring if it's a chemical or physical change!
Hypothesis- Explosion = Chemical Change
Equipment- Sample of ZnO (zinc oxide)
-Heat Source
-Scales
-Heat Proof Container- Evaporating dish
-Tongs
-Heat Proof Mat
Method-
1. Get a sample of ZnO in an evaporating dish
2. Weigh the ZnO & Container - Record Weight
3. Heat Container & ZnO on a hot plate
4. Observe any changes- use phones for before and after photos (video?)
5. Take off the heat and put on a heatproof mat
6. Let Cool - Observe - Photos
7. Re Weigh
Results- What Happened? - It weighed 57 Grams in the beginning and it didn't change after we heated it.
Conclusion- The colour changed slightly into a yellow theme and the smell started changing, altogether it was a physical change because it could turn back into its original form.
ZnO (zinc oxide) is a white powder that is insoluble in water. It is used as an additive in many different materials and products including cosmetics, food supplements, rubbers, plastics, glass and lubricants ETC.
How can ZnO help us?
Zinc Oxide can help us by producing sunscreen which preventing sunburn and can reflect heat away from the object or thing that uses the sunscreen (ZnO).
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