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QUESTION

# What is the formula for the conjugate base for HSO3?

For bisulfite, HSO_3^-, the conjugate base is sulfite ion, SO_3^(2-).

Sulfur dioxide dissolved in water gives sulfurous acid, H_2SO_3. The conjugate base of this material is the original less a proton, i.e. HSO_3^(-), and the conjugate base of this material is SO_3^(2-).