"Pyrosulphuric" Natural Recordings by Native Speakers
Pyrosulphuric acid and sulfur trioxide are combined in formic acid and concentrated sulfuric acid to form pyrosulphuric acid (fuming sulfuric acid), which is a highly corrosive and toxic mixture with the chemical formula H2S2O7. Brown fumes can be produced when it is dispersed in the air.
Pyrosulfate refers to a class of compounds called salts that contain the pyrosulfate anion (S2O72-). These compounds are formed when sulfuric acid (H2SO4) is heated with a strong base, such as sodium hydroxide (NaOH) or potassium hydroxide (KOH), to produce the pyrosulfate ion.<br><br>Pyrosulfates are typically salts of the general formula Na2S2O7 or K2S2O7, which are obtained by the oxidation of sulfur or sulfites in the presence of a base.<br><br>Some common pyrosulfates include:<br><br> Sodium pyrosulfate (Na2S2O7)<br> Potassium pyrosulfate (K2S2O7)<br> Magnesium pyrosulfate (Mg2+ S2O72-)<br><br>Pyrosulfates are often used as drying agents, as they can absorb and remove water from solutions. They are also used in the manufacture of other chemicals, such as fertilizers and detergents.