Question

Indicate whether the erroro introduced by each of the following problems would result in a high or low value for Cu recovery, or would not affect the results? some of the copper nitrate solution is splashed out of the beaker in part 1. insufficent NaOH is added in Part 2 the solutions bumps, in Part 3, splashing out some CuO some solid is lost in the decanting process. adding excess H2SO4 in part 4. some unreacted zinc remains with the product at the end of the exerpiment.the washings in part 5 are insufficent to remove all of the solution residues from copper the copper is not completely dried low value for Cu recovery would not affect the recovery of Cu high value for Cu recovery.

Answer 1

Step-by-step explanation:

1. Splashing out some copper nitrate solution in Part 1 would result in a low value for Cu recovery, as some of the starting material would be lost.

2. Insufficient NaOH added in Part 2 would result in a low value for Cu recovery, as not all of the CuO would be converted to Cu(OH)2.

3. The solution bumping and splashing out some CuO in Part 3 would result in a low value for Cu recovery, as some of the CuO would be lost.

4. Adding excess H2SO4 in Part 4 would not affect the results, as H2SO4 is not involved in the reaction that produces Cu.

5. Some unreacted zinc remaining with the product at the end of the experiment would result in a high value for Cu recovery, as some of the Zn would be falsely counted as Cu.

6. Insufficient washings in Part 5 to remove all of the solution residues from copper would result in a high value for Cu recovery, as some of the solution residues would be falsely counted as Cu.

7..The copper not being completely dried would not affect the recovery of Cu, as the weight of the Cu would still be the same whether it is dry or wet