What is HIO2? Important knowledge about HIO2.

1. Definition of HIO₂

HIO₂, also known as Iodous Acid (in English), is a chemical compound formed from two Hydrogen atoms, one Iodine atom, and two Oxygen atoms. The atomic mass of this substance is 143.909. HIO₂ contains one H₂O molecule and one IO molecule. Viewed from above, this molecule has a shape like a letter V. The HIO₂ molecule also has the ability to form ions by separating one hydrogen atom.

2. Properties of HIO₂

2.1 Physical Properties of HIO₂
HIO₂ is solid, white in color, and has no distinctive odor. The pH of HIO₂ typically ranges from basic to neutral.

2.2 Chemical Properties of HIO₂
HIO₂ is very easy to be oxidized to Iodic Acid (HIO₃), but it is harder to reduce to I₂. It also has the ability to react with alkali metals to form iodate salts.

3. Common Chemical Equations of HIO₂
   Information about the reactions of metals, acids, non-metals, and salts with HIO₂ is quite limited. This may be due to the instability of HIO₂, causing difficulties in carrying out chemical reactions.

4. Synthesis of HIO₂

4.1 Laboratory Synthesis of HIO₂
HIO₂ can be synthesized through the reaction between I₂ and H₂O₂ in an acidic environment.
4.2 Industrial Synthesis of HIO₂
Technology is being developed to synthesize HIO₂ more efficiently and safely. Currently, HIO₂ is mainly produced through the reaction between I₂ and H₂O₂ in an acidic environment.