How would you calculate the pH of a solution containing a fully protonated polyprotic acid with an initial concentration of 0.1 M and K_a1 = 1.0 x 10^-3?

• A. Use the formula pH = -log([H⁺]), where [H⁺] is calculated using the ICE chart method with K_a3.
• B. Use the formula pH = -log([H⁺]), where [H⁺] is calculated using the ICE chart method with K_a1.
• C. Use the formula pH = -log([H⁺]), where [H⁺] is calculated using the ICE chart method with K_a2.
• D. Use the formula pH = -log([OH^-]), where [OH^-] is calculated using the ICE chart method with K_b1.

Answer: (B)