Copper (II) Chloride and Iron Lab

I gotta say, this was actually one of the coolest labs we have done this year. This lab was the experiment of the single replacement reaction: Fe + CuCl2 ---> Cu + FeCl2.  On the first day, we put a polished iron nail in a solution of water and Copper (II) Chloride in a baby food jar. After that, we let it sit overnight for the reaction to take place. On the next day, we took out the nail and washed to copper with water and HCl. This is to clean and purify the copper. Then, we let the copper dry over the weekend so that we would get an accurate measurement of the copper. The whole purpose of this lab was to see the theoretical and actual yields of the copper, so we could find the percent yield of the copper. The coolest part about this lab was to see that the nail had been eaten by the solution. The strong nail broke apart and literally dissolved! This lab was just awesome!