How Is Silver Sulfide Prepared?

Silver sulfide can be prepared by reacting a solution of silver nitrate (AgNO3) with hydrogen sulfide gas (H2S) or a soluble sulfide salt such as sodium sulfide (Na2S) or ammonium sulfide ((NH4)2S).

The reaction between silver nitrate and hydrogen sulfide gas is as follows:

2AgNO3 + H2S → Ag2S↓ + 2HNO3

The reaction between silver nitrate and a soluble sulfide salt is as follows:

AgNO3 + Na2S → Ag2S↓ + 2NaNO3

Both reactions result in the formation of black precipitate of silver sulfide, which can be filtered, washed, and dried to obtain the solid product. It is important to note that the reaction should be carried out in a well-ventilated area as hydrogen sulfide gas is toxic and can be harmful if inhaled. Additionally, care should be taken when handling silver nitrate as it is a corrosive substance that can cause skin and eye irritation.