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Question

Predict which of the formulae are not correct for the given compounds: Correct the wrong ones.
Silver sulphide : AgS


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Solution

Silver sulphide:

  1. Silver sulphide is the sole sulphide of silver and it is a thick black solid.
  2. In photography, it can be used as a photosensitizer.

Chemical formula:

  1. The chemical formula that is given as AgS for Silver sulphide is wrong.
  2. There is no compound with a chemical formula AgS.
  3. Silver sulphide has a chemical formula Ag2S. As the valency of sulpahte(-2) moves to silver and valency of silver (1) moves to sulphite.

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