1. Consider the following materials and cell diagram:

silver, aluminum and nickel electrodes?

1.0 M solutions of AgNO3 , Al (NO3)3 and Ni(NO3)2

a) From the above list, select the materials that are capable of producing the greatest voltage, then label the diagram below (note you will not need all of the materials).

b) Calculate the initial voltage for the electrochemical cell in part a).

c) Write the complete balanced redox equation for the cell in part a).

d) Which two metals from the above list would produce an electrochemical cell with the smallest initial voltage?

1. A trophy manufacturer electroplates an iron trophy with gold.

POWER

SUPPLY

a) Write the equation for the half-reaction that occurs at the iron trophy.

b) Identify an appropriate electrolyte.

c) Identify the cathode.

d) Explain how to maintain a constant metal ion concentration in the electrolyte.

1. Consider the following electrolytic cell used for the Hall-Hoult Process; one electrode is carbon and one electrode is graphite, and one is fused coke. You may need to do some research to complete these questions; references not necessary for this part.

a) Write the equation for the half-reaction taking place at the anode.

b) Write the equation for the half-reaction taking place at the cathode.

c) Clearly indicate on the diagram above, the direction of electron flow.

1. A 2.000g strip of cobalt metal is suspended in 100.0 mL of 0.20 M AgNO3 and a reaction occurs. When the reaction is complete, there is an excess of cobalt. The excess cobalt is removed from the solution, washed and dried and its mass is found to be 1.411g.

a) Using the table of Standard Reduction Potentials of Half-cells, write the balanced net ionic equation for the redox reaction.

b) Using the experimental data, calculate the moles of Co and Ag+ reacting, and show how these values support the balanced equation.

1. Draw a diagram of a standard electrochemical cell which could make use of the reaction

Zn(s) + Cl2(g) ?Zn2+(aq) +Cl-(aq) . Identify all of the chemical species in the cell.

Research: Corrosion

Research and report on one of the following topics. You may answer on this sheet by hand, or you may use a word processor and attach it separately in the Dropbox. Your report should include the chemistry of the process you are investigating (what ions and elements are involved? What techniques? How do they work?), and a brief analysis of safety concerns for workers involved in the process, and other environmental or health effects. Be sure to site your sources. This does not need to be a long report.

Techniques to prevent corrosion of industrial structures

Techniques to create corrosion free products (silverware, braces, etc.)