Molecules Lab Questions

1.

     a. The observations lead us to believe that the reaction was incomplete because the copper oxide quickly reacted with the HCl.
     b. We would have been more efficient with the heating and sturring process, more oxygen would have reacted with the copper making CuO.

2.
     a. The original mass was 1.07 g
     b. The left over mass was 0.11 g

3.
     a. ?? (Help)
     b. (Unable to do)

4.
     a.After we added zinc, the solution caused the zinc itself to start bubbling and fizzing, eating away at the  zinc.
     b. The reactants between the zinc and the solution were caused by the different charges in the zinc ions and the solution.
     c. The color can be used because once the Cu2(plus) ions have been removed, the color should go back to its original state.

5.
     a. The CuCl2 solution was used up in order recover the Cu metal from the solution.
     b. The CuCl2 solution into filtration, the zinc was left behind and desposed of, and the copper was recovered.