Sodium polysulfide | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-10-25

This is an audio version of the Wikipedia Article:
Sodium polysulfide

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SUMMARY
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Sodium polysulfide is a general term for salts with the formula Na2Sx, where x = 2 to 5.  The species Sx2−, called polysulfide anions, include disulfide (S22−), trisulfide (S32−), tetrasulfide (S42−), and pentasulfide (S52−). In principle, but not in practice, the chain lengths could be longer.  The salts are dark red solids that dissolve in water to give highly alkaline and corrosive solutions. In air, these salts oxidize, and they evolve hydrogen sulfide by hydrolysis.