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Don1321 writes,
"We have a lab on making ice cream with a few questions we aren't sure about:
Would vanilla be an element, compound or mixture. If a mixture, heterogeneous or homogeneous.
We put ice and rock salt in a large bag and put a smaller sandwich bag with the ice cream mixture into it. Kneaded it and it solidified. The question asked is, ice, itself if pretty cold. Why did we add salt to it?
In order to make ice cream, you need an environment that is colder than the initial mixture. Why? (Use temperature and heat in your answer.)
Thanks for any help you can give."
AWKAWK1 answers:
"Vanilla can be used as crushed fruit(heterogeneous), oil (homogeneous) or synthetic flavor (vanillin mixed with sugar).
To make ice cream you should freeze water contained in milk and other ingredients. To do this temperatute of mixture should be about -5 to -10 Celcius. At home usually we used freezing mixture (ice+salt)"
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