What is Potassium sulfite?
[[File:Potassium sulfite.png|thumb|How the atoms in potassium sulfite are put together]] '''Potassium sulfite''' is a [[chemical compound]]. Its chemical formula is K<sub>2</sub>SO<sub>3</sub>. It contains [[potassium]] and [[sulfite]] [[ion]]s. ==Properties== It is a white [[crystalline]] solid. It is a [[reducing agent]]. It can react with [[oxidizing agent]]s to make [[potassium sulfate]]. ==Preparation== It is made by reacting [[sulfur dioxide]] with [[potassium hydroxide]]. :2 KOH + SO<sub>2</sub> → K<sub>2</sub>SO<sub>3</sub> + H<sub>2</sub>O ==Uses== It is used to [[food preservation|preserve]] food. Sulfites can cause [[allergies]] in some people, though. ==Related pages== *[[Sodium sulfite]] *[[Potassium sulfate]] [[Category:Potassium compounds]] [[Category:Sulfur compounds]]