Ca(HSO3)2 is calcium hydrogen sulfite.
Sulfite- SO3-2 (charge of -2)
Al(HSO3)3
The valence of a bisulphite ion is -1; its formula is HSO3-1. (Although the name bisulphite is still acceptable, it is now considered preferable to call it "hydrogen sulfite ion".)
Cu(HSO3)2
HSO3 is commonly known as Hydrogen Sulfite.
Ca(HSO3)2 is calcium hydrogen sulfite.
H2SO3 will ionize to H+ + HSO3-. The Keq = [H+][HSO3-]/[H2SO3]HSO3- will ionize to H+ + SO3^2-. The Keq = [H+][SO^2-]/[HSO3-] ... very small value
The chemical equation for the reaction between sulfuric acid (H2SO4) and water (H2O) is: H2SO4 + H2O -> H3O+ + HSO4-
The formula for zinc bisulfite is Zn(HSO3)2.
Sulfite- SO3-2 (charge of -2)
The oxidation number of S in HSO3- is +4. This is determined by assigning a -1 oxidation state to the hydrogen atom and a -2 oxidation state to the oxygen atoms, which leaves sulfur with a +4 oxidation state to balance the overall charge of -1 for the ion.
SO32
The chemical formula for magnesium hydrogen sulfite is Mg(HSO3)2. It consists of one magnesium ion (Mg2+) and two hydrogen sulfite ions (HSO3-).
Bisulfite ion is the ion HSO3−
Al(HSO3)3
Sn(HSO3)2