Question

The experiment was taking copper II chloride, diluting it with deionized water, heating it, and adding a metal rod so copper could form on it. I just need help with 3 and 4.

2. What observable evidence from the experiment do you have that shows that copper (II) chloride is, indeed, the limiting reactant? 3. Error Analysis. If in Step 9, some of the solid copper was lost and was not recovered, would this increase or decrease the percent yield? Explain. 4. Error Analysis. If in Step 10, the solid copper was not completely dry, would this increase or decrease the percent yield? Explain.

Answer 1

3. If some of the copper ions are lost, then it will affect the total amount of copper obtianed. We will have less amount of copper and thus the percent yield will decrease.

4. If the solid copper obtained is not dried properly, it will show more weight as the weight of the water will also be included in the product and as a result there will be an increase in percent yield.