Lab: Chemical Formula for Copper Chloride pg 6 Procedure Mass 2.00 grams of the copper(II) chloride Dissolve in the copper(II) chloride in 50 mL of distilled water with stirring and heat on a hot plate until almost boiling TURN OFF HOT PLATE Mass a piece of aluminum metal Bend the metal in a curve to fit into the beaker Gently place the metal in the hot copper(II) chloride solution

Keep the aluminum in the beaker until the reaction is complete and the solution is no longer blue (stirring will speed up the process)& no longer bubbling Mass a piece of dry filter paper Set up the filter apparatus and collect the copper Rinse the copper TWICE with distilled water Set the filter paper AND aluminum metal on a watch glass to dry overnight Mass the dry copper and aluminum metal the next day

Data Table_ Value (units) Mass 2.00 grams of copper(II) chloride _______________ Mass of aluminum metal before _______________ Mass of dry filter paper before filtering _______________ Mass of filter paper + copper after it dries _______________ Mass of dry aluminum metal after _______________ Mass of aluminum metal lost _______________

___Al + ___CuCl2  ___AlCl3 + ___Cu Balance the equation:   ___Al + ___CuCl2  ___AlCl3 + ___Cu 2. Calculate the mass of Al that reacted   Al before - Al after Al lost 3. How many moles of Al would that be? 2 3 2 3 1.21 g 0.93 g 0.28 g 0.28 g Al 1 mol Al 27.0 g Al = 0.01 mol Al

___Al + ___CuCl2  ___AlCl3 + ___Cu   4. Calculate the mass of Cu produced 5. How many moles of Cu would that be? 2 3 2 3 Dry filter + Cu - Dry filter paper Cu produced 1.63 g 0.69 g 0.94 g 0.94 g Cu 1 mol Cu 63.5 g Cu = 0.015 mol Cu

___Al + ___CuCl2  ___AlCl3 + ___Cu   What is the mole ratio between Al and Cu?    Determine the mass percent of copper in the compound Determine the mass percent of chlorine in the compound 2 3 2 3 0.015 mol Cu = 3 2 0.01 mol Al 0.94 g Cu = 47 % Cu 2.00 g CuCl2 1.06 g Cl = 53 % Cl 2.00 g CuCl2

Data Table_ Value (units) Mass 2.00 grams of copper(II) chloride _______________ Mass of filter paper + copper after it dries _______________ Mass of dry filter paper before filtering _______________ Mass of copper produced _______________ Mass of aluminum metal before _______________ Mass of dry aluminum metal after _______________ Mass of aluminum metal lost _______________ 2.00 g 1.63 g 0.69 g 0.94 g 1.21 g 0.93 g 0.28 g