4.4 Electrode Potentials

Section A

For each of the questions only one of the lettered responses (A-D) is correct.

Select the correct response in each case and mark its code letter by connecting the dots as illustrated on the answer sheet.

Section B

Answer all questions in the spaces provided.

1. The electrode potentials of the halogens and of iron ions can be used

to predict whether or not reactions will occur.

E^o/V

Cl₂ + 2e^- 2Cl^- +1.36

Br2 + 2e^- 2Br^- +1.07

Fe³⁺ + e^- Fe²⁺ +0.77

I₂ + 2e^- 2I^- +0.54

Fe²⁺ + 2e^- Fe -0.44

Use these data to show whether or not the following reactions will occur in aqueous solution. Write an equation for any reaction that takes place.

(a) Bromine solution added to a solution of iodide ions.

[2]

(b) Chlorine solution added to a solution of iron(I1) ions.

[2]

.