3D model (JSmol)
|Molar mass||128.97 g/mol|
|Appearance||white hygroscopic crystals|
|Melting point||decomposes at 70°C|
|Solubility||soluble in ethanol|
|Acidity (pKa)||2.46, 7.3|
|Other anions||selenic acid |
|Other cations||sodium selenite|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Properties[change | change source]
Selenous acid is a weak acid. It can be heated to make selenium dioxide. It is more stable than sulfurous acid. It can be crystallized as a white solid. It is a weak oxidizing agent. It reacts with bases to make selenites.
Preparation[change | change source]
It is made by dissolving selenium dioxide in water.
Uses[change | change source]
It is used to dye steel a blue-grey color. It is used in the making of organic compounds.
Safety[change | change source]
Selenous acid is very toxic. Just ingesting a small amount can kill you.