Potassium sulfite

Potassium sulfite is a chemical compound. Its chemical formula is K2SO3. It contains potassium and sulfite ions.

How the atoms in potassium sulfite are put together

Properties

It is a white crystalline solid. It is a reducing agent. It can react with oxidizing agents to make potassium sulfate.

Preparation

It is made by reacting sulfur dioxide with potassium hydroxide.

2 KOH + SO2 → K2SO3 + H2O

Uses

It is used to preserve food. Sulfites can cause allergies in some people, though.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.