What effect does hydrogen sulfide have on silver?

Hydrogen sulfide (H₂S) is known for its reaction with metals such as silver, leading to the formation of silver sulfide (Ag₂S). This chemical reaction occurs when hydrogen sulfide gas comes into contact with silver surfaces, resulting in a darkening or tarnishing effect. The coordination of sulfur with silver ions causes the shine of the silver to diminish, leading to the characteristic patina or tarnish.

This tarnishing effect is not just an aesthetic issue; it also indicates a change in the chemical state of the silver, as it transforms from a shiny, metallic surface into one that is dull and blackened. Therefore, the primary impact of hydrogen sulfide on silver is indeed tarnishing, affirming that the correct response addresses the true nature of this chemical interaction.