Hey... So this was our lab and I wanted to know what do you think. Since we put in copper 2 chloride and then dried it for 4 days, I think that some of it was left in there. After we pour out copper, and wash the beaker(which I was trying to for a good 10 minutes), I notice that some of the copper is like stuck in and out of the beaker. Heck, I think I'm confusing myself... What do you think?
Copper (II) chloride is soluble in water. Hence after you wash the beaker for a good 10 minutes, there would be no copper (II) chloride left. However, you mentioned to pour out copper. I wonder whether you did some redox reaction with copper (II) chloride to form copper metal. If so, the metal powder may absorb CO2 from the air with moisture to form CuCO3 and Cu(OH)2. The solubility of Cu, CuCO3, and Cu(OH)2 are quite small.
