kia Ora bloggers Today we are doing a practice practical.
Title-physical or chemical change
Hypothesis- Heat+sparks=chemical
Equipment- sample of zno (zinc oxide)
Heat source-hot plate
Scales
Heat proof container-evaporating dish
Tongs
Heat proof mat
method
1.get sample of zno in an evaporating dish
2. weigh the zno & container-record weight
3. heat container and zno on plate
4. observe any changes-use phone for before and after photos
5. take of heat & put on heat proof mat
6. let cool-observe-photos
7. re weigh
results: there were no sparks but it went to white then yellowish beige then a sickly green
I thought it would spark.
conclusion: the results were they changed colour and did not spark so my hypothesis was wrong.
In conclusion I was wrong.
Positive thoughtful helpful
blog ya later.
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