Electrochemical Cells

Mercury cells use a moist paste of (Ammonium chloride) and (Zinc chloride) as the electrolyte. This combination allows for the effective conduction of electricity while maintaining the integrity of the mercury electrode.

The reaction is a disproportionation reaction. The relation between and for a half-reaction is given by the Nernst equation: For the given reaction: Given and , the required is: Simplifying this gives .

• A) Electrodes in batteries → Polyacetylene (II): Polyacetylene is a conducting polymer used in electronic devices including battery electrodes.
• B) Welding of metals → Oxyacetylene (III): Oxyacetylene flame (from reaction of oxygen and acetylene) is used for metal welding due to its high temperature.
• C) Toys → Polypropylene (I): Polypropylene is a lightweight, durable plastic used in making toys.