Chemistry/Redox

Chemistry 12 REDOX LAB DATA

ANALYSIS 1. Examine Table 2. If the colour of the petroleum ether layer for the reaction mixture involving X2 and Y– is the same as the colour of X2 in petroleum ether recorded in the last column of Table 2, you can conclude that X2 DID NOT REACT to form a different substance. In this case, place a dash, “—”, in the table below. However, if the colour of the petroleum ether layer in the reaction is DIFFERENT from the colour of X2 recorded in the last column, you can conclude that a reaction DID occur. Complete the entire table below.

2. The metal ion/metal reduction reactions can be written as A2+(aq) + 2 e– &lt;===&gt; A(s). List the reduction reactions for A2+, B2+, C2+, D2+ and E2+ from greatest tendency to reduce to least tendency.

3. The halogen/halide ion reduction reactions can be written as X2(aq) + 2 e– &lt;===&gt; 2 X–(aq). List the reduction reactions for X2, Y2 and Z2 from greatest tendency to reduce to least tendency.

4. One of the metal ions used can oxidize only one of the halide ions. None of the other metal ions can oxidize any of the halide ions. Combine all the reduction reactions in this experiment into one list, ranked from greatest to least tendency to reduce.

5. Write complete redox reactions showing how X–, Y– and Z– individually react with X2, Y2 and Z2. Only list combinations that actually react.

6. In the early 1900's, the drains of sinks in chemical laboratories used to be made of lead metal. Would disposal of Zn2+ solutions cause a problem with such sinks? Explain your answer. Would disposal of Cu2+ solutions cause a problem? Explain.

7. As the manager of a swimming pool which sterilizes the water by dissolving Cl2 into the water, what advice would you have for patrons that wish to wear silver rings in the pool? Explain the chemistry behind your advice. What advice would you have for patrons that wished to wear copper rings? Gold rings? Explain.