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(covers Phase of Matter Lab, Observations of a Chemical Reaction Lab and Thickness of Aluminum Foil Lab)
Name:
Period:
Answer the following questions in a clear, concise manner and showing all work,
1. What is the chemical formula of the hydrate in this lab, ________________________, what phase (state of matter) is it in the lab (Observation of a Chemical Reaction Lab).?
_______________________
2. Write the length of the Aluminum foil you measured here, ___________________. Explain using your knowledge of Significant figures and lab equipment why you recorded this number.
3. In the Phase of Matter lab, what are you assuming about the hotplate so that you can say that total time (running time "water" is on hotplate) is equal to total energy (energy given from the hotplate to the "water")?
______________________________________________________________________
4. In the Thickness of Aluminum foil lab, I mistakenly determined the length of the aluminum foil SMALLER than it actually was. How does that affect the calculated Al foil thickness, explain (the calculations)
5. In the Observation of the Chemical Reaction lab, there were 4 potential observation of a chemical reaction. Please list them below.
Observation #1:
Observation #2:
Observation #3:
Observation #4:
Of the 4 potential observation above, there was one that from the balanced chemical reaction would indicated that the observation did not come from the chemical reaction. In the space below, indicate what that observation was and explain what actually happened to get that observation.
6. In the Phase of Matter lab, what portion of the going from solid ice thru boiling away required the greatest energy usage (please use technical name). How do you know this if you are looking at the Heating Curve (a diagram)?