Final answer:
The K value for the titration of carbonate anion with water is 8.0 × 10^-7 at 37˚C.
Step-by-step explanation:
The K value for the titration of carbonate anion with water is determined by the equilibrium constant (K) for the reaction of CO₂ (aq) with water to give carbonic acid.
The equilibrium equation for this reaction is:
CO₂(aq) + H₂O(l) → H⁺(aq) + HCO₃⁻(aq)
The K value for this reaction is K = 8.0 × 10-7 (at 37˚C).