What is SeO3? Important knowledge about SeO3.

1. Definition of SeO₃

SeO₃, also known as Selenic Trioxide or in English as Selenic Oxide, is a white, odorless solid with strong acidic properties. The molar mass of SeO₃ is 126.96 g/mol. SeO₃ is composed of one Selenium (Se) atom and three Oxygen (O) atoms. The structure of the SeO₃ molecule is pyramidal at the Se atom and has two pairs of non-bonding electrons.

2. Properties of SeO₃

2.1 Physical properties of SeO₃: SeO₃ is a white, odorless solid. Its environment has a low pH, indicating strong acidity.

2.2 Chemical properties of SeO₃: SeO₃ reacts easily with water, forming selenic acid H₂SeO₃. It can also react with alkali and alkaline earth metals to form selenate salts.

3. Common chemical equations involving SeO₃: SeO₃ is commonly involved in reactions with metals and acids. For example:

SeO₃ + 2NaOH -> Na₂SeO₃ + H₂O

SeO₃ + 2KOH -> K₂SeO₃ + H₂O

SeO₃ + H₂O -> H₂SeO₃

4. Synthesis of SeO₃

4.1 Laboratory synthesis of SeO₃: SeO₃ can be synthesized by heating SeO₂ in the air:

2SeO₂ + O₂ -> 2SeO₃

Note: SeO₃ is toxic and can cause burns if directly contacted, so safety measures should be taken during experiments.

4.2 Industrial synthesis of SeO₃: In industry, SeO₃ is typically synthesized by oxidizing Selenium under high-temperature conditions.