- Definition of K2S2O8
K2S2O8, also known as potassium persulfate, is a potassium salt of persulfuric acid. Its English name is Potassium persulfate. K2S2O8 consists of 2 potassium atoms, 2 sulfur atoms, and 8 oxygen atoms. The molecular weight of K2S2O8 is 270.33 g/mol, in which 2 potassium atoms account for 29.21%, 2 sulfur atoms account for 23.55%, and 8 oxygen atoms account for 47.24%. The molecule of K2S2O8 has a structure consisting of 2 K+ ions and 1 S2O8^2- ion.
- Properties of K2S2O8
2.1 Physical properties: K2S2O8 is a solid, colorless, odorless substance. The pH of the K2S2O8 solution in water ranges from 4 to 6.
2.2 Chemical properties: K2S2O8 is a strong oxidizing agent, capable of reacting with many metals and non-metals to produce various products.
- Common reaction equations with K2S2O8
As K2S2O8 is a strong oxidizing agent, it can react with many other substances. For example, K2S2O8 can react with metals such as Fe, Cu, Ni; react with acids such as H2SO4, HCl, HNO3; react with non-metals such as Cl2, Br2, I2 and react with salts such as NaCl, NaBr.
- Synthesis of K2S2O8
4.1 Laboratory synthesis: K2S2O8 can be synthesized through the oxidation of KHSO4 by K2Cr2O7 in an acidic environment.
4.2 Industrial synthesis: In the industry, K2S2O8 is synthesized by electrolyzing a solution of KHSO4 under high temperature and pressure conditions.