Respuesta :
Answer:
When silver tarnishes, it undergoes a chemical reaction with sulfur compounds in the air. This reaction forms a dark-colored compound called silver sulfide. Here is a step-by-step explanation of the reaction:
Explanation:
1. Silver, in its pure form, is a shiny metal that does not easily react with other substances.
2. However, when silver comes into contact with sulfur-containing compounds, such as hydrogen sulfide (H2S) or sulfur dioxide (SO2) present in the air, a chemical reaction occurs.
3. The sulfur compounds react with the surface of the silver, forming silver sulfide (Ag2S).
4. Silver sulfide is a black or grayish compound that appears as a tarnish layer on the surface of silver objects.
5. The tarnish layer is composed of silver sulfide particles, which adhere to the surface of the silver and give it a dull and tarnished appearance.
6. This tarnishing process is often accelerated in the presence of moisture and certain pollutants, such as hydrogen sulfide emitted from burning fossil fuels.
7. Tarnish can be removed from silver by using various cleaning methods, such as polishing or using specialized silver cleaning products.
In summary, when silver tarnishes, it reacts with sulfur compounds in the air to form silver sulfide, which creates a tarnish layer on the surface of the silver object.
