Introduction to the properties and uses of fuming sulfuric acid

［分子style]h2so4·χso3 [property]colorless or brown oily thick fuming liquid. it is composed of sulfur dioxide dissolved in 100%sulfuric acidmade in. generally contains trioxidesulfur5%-20%, up to80%,its density, melting point, the boiling point, etc. all depend on the content of sulfur trioxideamountdifferent. commonly used ones are20% smokesulfuric acid(ie104.5% h2so4.relationship density1.9 melting point 11℃,boiling point 166.6℃. also40%、60% and 66%…