In a solution of carbonic acid (H₂CO₃) with pK_a1 = 6.35 and pK_a2 = 10.33, what is the principal species at pH 8?

• A. Carbonate ion (CO₃^2-)
• B. Bicarbonate ion (HCO₃^-)
• C. Carbonic acid (H₂CO₃)
• D. Hydronium ion (H₃O⁺)

Answer: (B)