Last modified: Mon 10/21/2013 10:30:13 pm
ACA

Oklahoma State University

It is OK to use your textbook or lecture notes from class, but if you can answers the questions without it that is OK too.

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.


First Name:

Last Name:

Laboratory Section:

For this ACA we will use this short version of the Standard Reduction Potential Table. You might want to print the table out before beginning the ACA.

Answer the following questions using the SRP Table.

1. The following reaction occurs in an electrochemical cell like the cell used in the Flash movie in lecture in Thursday's class (remember we looked at the reaction between Zn and H+(aq),

Fe(s) + 2H+(aq) ----> Fe2+(aq) + H2(g)

Answer the following questions:

a) What is the composition of the electrode in the anode compartment?

b) What is(are) the ions in the cathode compartment?

c) Towards which electrode do the cations in the salt bridge move?

d) What is the value of the cell potential for the cell?

volts

e) Is this reaction thermodynamically favored? How do you know?

2. Using the SRP Table answer the following questions,

a) which is the stronger oxidizing agent : Fe2+(aq) or Al3+(aq)? (NOTE: remember an oxidizing agent is the agent that causes another species to be oxidized.)

b) Which is the stronger reducing agent: Ni(s) or Br-? (NOTE: remember a reducing agent is the agent that causes another species to be reduced.)

c) Identify a chemical species that will reduce Pb2+ but not Zn2+.

d) write the half-reations and predict the product of the reaction between Ba(s) and H2O.

oxidation half-reaction

reduction half-reaction

products

e) Use the relationships

Go = -nFEo where F = 96,500 J volt-1

and Go = -RT ln K where R = 8.314 J mol-1 K-1

to calculate K for the reaction inQ2 part d.

K =

3. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

4. If there is one question you would like to have answered in lecture, what would that question be?