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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 for ammonia ________________________, what phase is it in the lab? _______________________
2. Write the mass of the Aluminum foil you measured here, ___________________. Explain using your knowledge of Significant figures 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 Observation of a Chemical Reaction Lab, If you still had a blue color to the filtrate, what does it mean and how can you fix it?
5. In the Thickness of Aluminum foil lab, I mistakenly determined the length of the aluminum foil GREATER than it actually was. a) How does that affect the calculated Al foil thickness, explain (the calculations).
b) What instrument would you add to the lab to ensure that this would not happen if you did the experiment again (cant' see that I would read ruler correctly)?