Questions for crystallization of milk
Procedure
1. prepare a liter of milk, topping, cups, spoon, box, ice, salt, bag
2. put ice in box
3. put milk in bag
4. push ice in box
5. Shake milk in box
6. when milk was frozen put topping in bag and shake again
7. bring bag come out
8. Can eat it
3. put milk in bag
4. push ice in box
5. Shake milk in box
6. when milk was frozen put topping in bag and shake again
7. bring bag come out
8. Can eat it
Questions
1) why do we add salt to the ice?
- It will lower the freezing temperature of the water and salt make exotherm.
2) why do we add the cookies and other things, only after the milk has frozen slightly
- Cookie won't mix milk if we put it after it frozen.
3) what are two factors that affect the freezing you think?
- Ice & salt
4) why do you need a bit of air in the bag?
- If there is much air inside it may pop the bag when shaking
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