Answer to Question #33192 in Inorganic Chemistry for Vaishali
2Ag + H2S --> Ag2S + H2
Silver sulphide is black. When a thin coating of silver sulphide forms on the surface of silver, it darkens the silver. Rubber contains sulphur, which will cause silver to tarnish. Certain foods like eggs, mayonnaise, mustard, table salt, olives, salad dressing, vinegar, fruit juices and onions also hasten the silver tarnish process. The sulphur in these foods will corrode silver. Flowers and fruits can etch the silver containers due to the acid produced as they decay.
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