2 Ag(s) + H₂S(g) → Ag₂S(s) + H₂(g)
Here's what the equation represents:
* 2 Ag(s): Two atoms of silver in its solid state (s).
* H₂S(g): One molecule of hydrogen sulfide in its gaseous state (g).
* Ag₂S(s): One molecule of silver sulfide, the black tarnish, in its solid state (s).
* H₂(g): One molecule of hydrogen gas, a byproduct, in its gaseous state (g).
Explanation:
When silver reacts with hydrogen sulfide, the sulfur from the hydrogen sulfide combines with the silver to form silver sulfide (Ag₂S), which is the black substance that causes tarnishing. Hydrogen gas (H₂) is released as a byproduct.
