Sulfur trioxide | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-10-20

This is an audio version of the Wikipedia Article:
Sulfur trioxide

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SUMMARY
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Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3, with a relatively narrow liquid range. In the gaseous form, this species is a significant pollutant, being the primary agent in acid rain.It is prepared on an industrial scale as a precursor to sulfuric acid.
In perfectly dry apparatus, sulfur trioxide vapor is invisible, and the liquid is transparent. However, it fumes profusely even in a relatively dry atmosphere (it has been used as a smoke agent) due to formation of a sulfuric acid mist. This vapor has no odor but is extremely corrosive.