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Secondary SchoolScience 8+4 pts
A silver article generally turns black when kept in the open for few days. The article when rubbed with toothpaste again starts shining. (a) Why do silver articles turn black when kept in open for few days? Name the phenomenon involved. (b) Name the black substance formed and give its chemical formula
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because H2S react with silver and make black suilver sulphide...
it is silver silver sulphide....Ag2S
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Image is not clear ........ ..
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