Last modified: Mon 10/21/2013 10:29:38 pm
ACA

Oklahoma State University

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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:

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Laboratory Section:

1. Determine the species oxidized and the species reduced in each of the following reactions.

a) 3Cu + 8H+ + 2NO3- ----> 2NO + 4H2O + 3Cu2+

formula of the species oxidized

formula of the species reduced

b) H2O(l) + 5VO2+(aq) + MnO4-(aq) ----> 5VO2+(aq) + Mn2+(aq) + 2H+(aq)

formula of the species oxidized

formula of the species reduced

c) I- + H2O + 2MnO4- ----> 2MnO2 + IO3- + 2OH-

formula of the species oxidized

formula of the species reduced

2) The Figure below shows an electrochemical cell for the reaction between Zn(s) and Cu2+. The beaker on the left is called the anode compartment. The anode compartment consists of the anode, the metal strip suspended in the aqueous solution of zinc(ii) nitrate. The beaker on the right is called the cathode compartment. The cathode compartment consists of the cathode, the metal strip suspended in the aqueous solution of copper (II) nitrate. The salt bridege is the inverted U-tube that connects the anode compartment and cathode compartment. Using the information in the Figure answer the following questions.

a) The oxidation half-reaction for this electrochemical cell is

b) The reduction half-reaction for this electrochemical cell is

c) The metal strip, in the anode compartment is a piece of

d) The cation in the anode compartment is

e) The anion in the anode compartment is

f) The metal strip, in the cathode compartment is a piece of

g) The cation in the cathode compartment is

h) The anion in the cathode compartment is

i) The cation in the salt bridge is

j) The anion in the salt bridge is

k) In the external circuit which direction are the electrons flowing?

l) The cations in the salt bridge are flowing towards the

m) The anions in the salt bridge are flowing towards the

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?