What is As2H4O7? Key knowledge about As2H4O7.

1. Definition of As₂H₄O₇
   As₂H₄O₇ is the chemical formula for pyroarsenic acid, also known as arsenic acid. Its English name is pyroarsenic acid. The molecular structure consists of 2 atoms of As (Arsenic), 4 atoms of H (Hydrogen), and 7 atoms of O (Oxygen). The atomic mass of As₂H₄O₇ is approximately 325.81 g/mol.

1.4 Ion structure
In As₂H₄O₇, the 2 As atoms form As₃+ ions while the 4 H atoms form H+ ions and the 7 O atoms form O₂- ions.

2. Properties: As₂H₄O₇
   As₂H₄O₇ is a white, odorless solid. The pH of this compound ranges from 1-3, indicating that it is a strong acid.

2.2 Chemical properties of As₂H₄O₇
As₂H₄O₇ can react with some metals such as Na, K to form arsenate salts.

3. Common chemical equations involving As₂H₄O₇
   Unfortunately, this section cannot be provided as As₂H₄O₇ does not really participate in many chemical reactions.

4. Synthesis of As₂H₄O₇
   As₂H₄O₇ can be synthesized through the thermal reaction between As₂O₅ and H₂O. However, this is not a common synthesis process in laboratories or industry due to the high toxicity of As.