Converting copper lab questions

1 a. Describe changes you observed as you heated the copper.
The copper, originally a reddish gold powder turned into a black solid chip. Once the copper was weighed after it had been heated, the mass was bigger.
b. Did the copper atoms remain in the crucible? Explain, using evidence from your observations.
Yes, the copper atoms remained in the crucible.

2 a. Were the changes you observed physical changes or chemical changes?
They were chemical changes and physical changes
b. What observational evidence leads you to that conclusion?
They were chemical changes because there was a change in odor, a change in color, and a change in mass. The physical changes were the change from a powder into a solid.


3 a. How did the mass of the crucible contents change after you heated the copper?
The mass got heavier by .08 g
b. Explain why the mass of the crucible contents changed in that manner.
The mass got heavier because the copper became oxidized.