This document describes three electron-transfer reactions, listing the oxidation and reduction half-reactions for each. The first reaction involves the oxidation of mercury to Hg2+ and the reduction of Cl2 to 2Cl-. The second reaction oxidizes zinc to Zn2+ and reduces Cl2 to 2Cl-. The third reaction oxidizes cobalt to Co2+ and reduces F2 to 2F-.

1. For the following electron-transfer reactiorn: The oxidation half-reaction is The reduction half-
reaction is:
Solution
1)Oxidation half-reaction :
Hg ----> Hg +2
+ 2e -
Reduction half-reaction:
Cl 2
+ 2e -
-----> 2Cl -
2) Oxidation half reaction :
Zn -----> Zn 2+
+ 2e -
Reduction half-reaction:
Cl 2
+ 2e -
-----> 2Cl -
3) Oxidation half reaction :
Co ------> Co +2
+ 2e -
Reduction half-reaction:
F 2 + 2e -
-----> 2F -