Question

Given this equation, 2Al + 3CuCl2 * 2H2O → 3Cu + 2AlCl3 + 6H2O

How do I calculate the theoretical yield of copper with the mass of Copper II chloride dihydrate as 2.40g and the mass of Copper as 1.40g?

Then the percentage yield?

Answer 1

convert those masses to moles.
You will need 3 moles of CrCl2 for every 2 moles of Al.
So, which will get used up first?
You will get the same moles of pure Cu as the number of moles of CuCl2 that were used.

Answer 2

oops--oobleck meant CuCl2 instead of CrCl2 but that should be obvious. Post your work if you get stuck and need more help.