Answer :
Acid 1: HSO₃⁻
Acid 2: HCO₃⁻
Acid 3: HPO₄⁻²
The formula of strongest conjugate base is, H₂PO₄⁻
Explanation :
According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.
The conjugate base of the following acids are:
Acid 1: sulfurous acid , H₂SO₃
The conjugate base of H₂SO₃ by donating a proton is, HSO₃⁻
Acid 2: carbonic acid , H₂CO₃
The conjugate base of H₂CO₃ by donating a proton is, HCO₃⁻
Acid 3: dihydrogen phosphate , H₂PO₄⁻
The conjugate base of H₂PO₄⁻ by donating a proton is, HPO₄⁻²
The order of acidic strength of acid is:
H₂SO₃ > H₂CO₃ > H₂PO₄⁻
The order of strength of conjugate base is:
H₂SO₃ < H₂CO₃ < H₂PO₄⁻
The formula of strongest conjugate base is, H₂PO₄⁻
