What happens when silver chloride is exposed to sunlight? Write a chemical equation for this reaction. Also, give one use of such a reaction.

When silver chloride (AgCl) is exposed to sunlight, it undergoes a photochemical reaction. This process involves the decomposition of silver chloride into silver metal and chlorine gas. The reaction can be represented by the following chemical equation:

Chemical Reaction

AgCl (s) → Ag (s) + ½ Cl₂ (g)

Applications of the Reaction

This reaction is significant in photography. Historically, silver chloride was used in photographic films and papers. When exposed to light, the silver chloride would decompose, allowing for the creation of images through further chemical processing.

Summary

• Exposure to sunlight causes silver chloride to break down.
• The reaction produces silver and chlorine gas.
• One practical use is in traditional photography.