<p>Chapter 9 Mass relationships lab report sheet Problem: Can you come up the correct mole ratio for copper II chloride in your final product? These are your reactions in this experiment:</p><p>CuCl2 2H20  CuCl2 + 2H20 2Al + 3CuCl2  3Cu + 2AlCl3</p><p>Prelab 1.What kind of reaction would start with a single reactant and involve an apparent decrease in mass?</p><p>2.Why must you avoid using the stirring rod to break up the solid while it is in the filter?</p><p>3.Why is it an error to weigh the beaker for day one before adding the masking tape?</p><p>4.When you break up the product, you place the rod on your desk in between using it-why can this be a source of human error?</p><p>Data Table 1.Mass of labeled beaker______2.Mass of calcium chloride before mixing it______3.Mass of beaker and sample before heating it______4.Mass of beaker and sample after heating it______5.Mass of filter paper______6.Mass of filter paper and dried product______7.Mass of dried product remaining______</p><p>Observations 1.During heating of the calcium chloride:</p><p>2.While adding water to the dried brown substance:</p><p>3.When the aluminum was added to the blue solution: Analysis 1B.mass of original sample (#2)______2B.mass lost (#3-#4)______3B.mass solid after heating(#4-#1)______4B.Mass of final product (#6-#5)______</p><p>Use the following formula for the next set of questions:</p><p>CuCl2 2H20  CuCl2 + 2H20 Let’s find out if your data is good enough to come up with the correct mole ratio to make CuCl2</p><p>5B.How many moles of copper did you recover? (turn the g of the final product to moles)</p><p>6B.How many moles of aluminum must have reacted? (turn the moles of copper into moles aluminum using the coefficients of the balance equation)</p><p>7B.What mass of chlorine was in the final product? mass solid after heating(#3B)-mass copper recovered(#4B) </p><p>8B. How many moles of chlorine were in the compound? (turn the mass of chlorine into moles)</p><p>9B. What is the mole ratio of chlorine to copper?</p><p>Chlorine moles Copper moles</p><p>10. The ratio from #9B represents the number of chlorine atoms per copper atoms in the compound-what is the correct formula for copper(I or II chloride? LET’S FIND OUT HOW GOOD YOUR DATA IS!! 11.Where did the mass loss come from after heating?</p><p>12.List three examples of chemical change throughout the experiment:</p>