Packet for Cu lab, naming and writing formulas, reaction types and ...

8) Fold your filter paper in half (the paper should look like a semi-circle). Now fold the paper in half again (the filter
paper should now look like a quarter of a circle). Holding the paper so that the curved end is toward you, open up the
paper so you have a little cup.
9) Place the filter paper in the funnel, making sure that you really do have a “cup.”
10) Add a little of the hot distilled water to your original beaker, swirl, and then carefully pour the solution into the funnel.
11) Add 50 ml of the hot distilled water to the funnel, and allow gravity to “rinse” the precipitate. This process is called
“gravity filtration.” Once this has filtered, repeat this rinse with an additional 50 ml of hot distilled water.
12) Make sure to turn off the hot plate when you have finished!
13) Get a small squeeze bottle of acetone (this is like nail polish remover) to do two final rinses. Use two or three good
squirts of acetone to rinse off all of your precipitate, allow to drain, then do this again. When you are finished,
carefully take your filter paper out of the funnel, and place it on a piece of brown paper towel. Congratulations, you
have just completed the conversion back to copper! Your instructor will tell you where to leave your final product.
Make sure to write your names on the brown paper towel.
14) Clean up your area completely! Wash your hands!
Final Day of Copper Conversions: How Much Did We Get?
Now that our final product has had a chance to dry, we will weigh the copper we recovered and see how it compares
with the amount we started with.
1) Find your group’s filter paper filled with copper. Carefully take it to one of the weighing stations, find the Mass of
the Copper and Filter Paper, and record it
Mass of the filter with copper: ____________.
2) Go back to step 7 from the last class, where you recorded the mass of the filter paper. You will use this to
calculate the mass of the copper you recovered.
Mass of Filter Paper Alone: _____________
Mass of Cu(s) = (Mass of Cu(s) + Filter Paper) – (Mass of Filter Paper Alone)
Your Mass of Cu(s) = _________________ - ______________________ = ___________________
3) Place your copper in the area marked for your section, and clean your lab table. Now you are ready to analyze
the results of your copper conversions!
Data analysis