The value of Ka1 and Ka2 for sulfurous acid are 1.70*10-2 and 6.40*10-8, respectively. Write the equation for the reaction that goes with Ka1

Sulfurous acid is the chemical compound with the formula H₂SO₃.

Balanced chemical reaction of sulfurous acid in water:

H₂SO₃ (aq) + H₂O (l) ⇄ HSO₃⁻ (aq) + H₃O⁺ (aq).

or H₂SO₃ (aq) ⇄ HSO₃⁻ (aq) + H⁺ (aq).

Ka is the acid dissociation constant, which quantifies the extent of acid dissociation (in this example H₂SO₃) in water.

Ka = [ HSO₃⁻]·[H₃O⁺] / [H₂SO₃].

or Ka = [ HSO₃⁻ ]·[H⁺] / [ H₂SO₃].