What is H3AsO3? Important knowledge about H3AsO3.

1. Definition of H₃AsO₃

H₃AsO₃, commonly known as Arsenic Acid (III) or Arsenious Acid, is a chemical compound consisting of hydrogen, arsenic, and oxygen atoms. In English, it is called “Arsenious acid”. The molecular weight of this compound is 141.94 g/mol. Its molecular structure consists of 3 hydrogen atoms, one arsenic atom, and 3 oxygen atoms. Its ion structure is AsO₃ (3-).

2. Properties of H₃AsO₃

2.1 Physical properties of H₃AsO₃

H₃AsO₃ is a colorless, odorless solid compound. Its state under normal conditions is solid. Its pH can vary depending on the concentration of the solution it is mixed with.

2.2 Chemical properties of H₃AsO₃

H₃AsO₃ has weak acidic properties. It can react with bases to form salt and water. It can also react with metals to produce hydrogen and metal salts.

3. Common chemical equations of H₃AsO₃

The chemical reactions include reactions with metals such as Fe, Cu, Ag; reactions with acids like H₂SO₄, HNO₃; and reactions with salts like NaCl, KI.

4. Synthesis of H₃AsO₃

4.1 Laboratory synthesis of H₃AsO₃

H₃AsO₃ can be synthesized in the laboratory by reacting As₂O₃ with water.

4.2 Industrial synthesis of H₃AsO₃

In industry, H₃AsO₃ is typically produced by reacting As₂O₃ with sulfuric acid.