Question

A galvanic cell consists of one half-cell that contains Ag(s) and Ag+(aq), and one half-cell that contains Cu(s) and Cu2+(aq). Write out the half-reactions occurring and state which reaction is occurring at the anode and which is occurring at the cathode.

Please explain mathemcatically and in words. Thanks!

Answer 1

The half reaction taking place are as follow

1.) Ag -----------> Ag⁺    + e^-

2.) Cu²⁺ + 2 e^-   --------> Cu

In first half reaction (1) , it is losing an electron, Hence (1) is an oxidation-half reaction.

In second half reaction (2) . it is gaining an electron. Hence (2) is an reduction- half reaction.

In a galvanic cell,

Oxidation reaction occurs at anode

Reduction reaction occurs at cathode

Hence Half reaction (1) will take place at Anode

          Half reaction (2) will take place at Cathode