What is SeO2? Important knowledge about SeO2.

1. Definition of SeO₂

SeO₂ or Selenium Dioxide is a chemical compound, an oxide of selenium with the formula SeO₂. In English, it is called Selenium Dioxide. This compound consists of one selenium atom and two oxygen atoms. The molar mass of SeO₂ is about 110.96 g/mol. In terms of molecular structure, the selenium atom is connected to two oxygen atoms to form a SeO₂ molecule. If ionized, it would form a SeO₂- ion.

2. Properties of SeO₂

SeO₂ is a white, odorless solid that is stable under normal conditions. The chemical properties of SeO₂ include its ability to react with water to form selenic acid, react with bases to form selenite, and react with metals to form selenite salts.

3. Common chemical reactions of SeO₂

SeO₂ is commonly encountered in the following reactions:

• Reaction with water: SeO₂ + H₂O -> H₂SeO₃
• Reaction with base: SeO₂ + 2NaOH -> Na₂SeO₃ + H₂O
• Reaction with metal: 2Na + SeO₂ -> Na₂SeO₂

4. Synthesis of SeO₂

SeO₂ is typically synthesized in the laboratory from selenium and excess oxygen in the atmosphere: 2Se + O₂ -> 2SeO₂. Industrially, SeO₂ is produced by burning selenium in oxygen.