what is the basicity of H2S03
You can find k1 and k2 (acid constants) for H2SO3 here.
http://www.scribd.com/doc/3274102/table-Ka-pKa
basity of H2s2o3
To determine the basicity of H2SO3 (sulfurous acid), we need to understand its acid-base properties.
Sulfurous acid is a weak acid and can donate one proton (H+) in an aqueous solution. It can be written in the ionization form as:
H2SO3 ⇌ H+ + HSO3-
In this equation, H2SO3 dissociates into a hydrogen ion (H+) and the hydrogen sulfite ion (HSO3-). The basicity of an acid is determined by the number of hydrogen ions (protons) it can donate.
Since H2SO3 can only donate one proton, it is considered to be a monoprotic acid. Therefore, the basicity of H2SO3 is 1.
In summary, the basicity of H2SO3 is 1 because it donates only one proton (H+) in an aqueous solution.