1. The reasons for the blackening of silver ornaments Blackening of silver jewelry is a normal natural phenomenon, as sulfur and oxides in air and other natural media have a certain corrosive effect on silver. After wearing silver jewelry for a long time, sulfur and silver combine to form a black sulfide silver film on the surface of the silver jewelry, which begins to appear as small spots. After the sulfide phenomenon intensifies, it slowly spreads into sheets, forming what is commonly known as silver scale, turning black and affecting the surface gloss of silver jewelry, People often mistake it for fading The chemical reaction equation is: 4Ag+H2S+O2=2Ag2S+2H2O How…