Question

How do you write a half-reaction In Electrochemistry?

Answer 1

Electrochemistry is the study of the generation of electricity on the energy released from a spontaneous chemical reaction and the use of electric energy to provide passage to a non-spontaneous chemical reaction. The cell reaction in electrochemistry can be written as:

$2{\mathrm{Fe}}^{+3}+{\mathrm{Sn}}^{+2}\underset{}{\overset{}{\to }}2{\mathrm{Fe}}^{+2}+{\mathrm{Sn}}^{+4}$

The half cell for each cell can be written as:

${\mathrm{Fe}}^{+3}+{\mathrm{e}}^{-}\underset{}{\overset{}{\to }}{\mathrm{Fe}}^{+2}$ Iron is the oxidizing agent

${\mathrm{Sn}}^{+2}\underset{}{\overset{}{\to }}{\mathrm{Sn}}^{+4}+2{\mathrm{e}}^{-}$ Tin is the reducing agent

Hence, from the above cell reaction, half cell reaction can be visualized in Electrochemistry.