1) The value of E o for the reaction A + B C is E o = 0.54V What is the value of

Question

1) The value of Eo for the reaction A + B C is Eo = 0.54V

What is the value of Eo for 3C 3A + 3B?

2) Using the reduction potentials table in the notes/book, which of the following is the best reducing agent?

Cl-

I2

Cl2

I-

3) A voltaic cell is set-up with an iron electrode in a iron(II) nitrate solution and a copper electrode in a copper (II) nitrate solution.

Use the reduction potentials table in the notes/book.

What is the reaction occuring at the anode?

What is the reaction occuring at the cathode?

What is the potential of the cell, E°cell?

Cu2+(aq) + 2e Cu(s)

Fe(s) Fe2+(aq) + 2e

E°cell = +0.79 V

Fe2+(aq) + 2e   Fe(s)

E°cell = 0.79 V

Cu(s)   Cu2+(aq) +  2e  

E°cell = +0.11 V

E°cell = 0.11 V

Cl-

I2

Cl2

I-

Explanation / Answer

1) E0 = - 3 x 0.54 V

= - 1.62 V

2) I - is the best reducing agent

3) the reaction occuring at the anode

  Cu(s)   Cu2+(aq) +  2e  

  the reaction occuring at the cathode

Fe2+(aq) + 2e   Fe(s)

the potential of the cell, E°cell

E°cell = 0.79 V

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