Determine the pH of a 0.18 M H₂CO₃ solution.Carbonic acid is a diprotic acid whose K_a1 = 4.3 × 10^-7 and K_a2 = 5.6 × 10^-11. A) 11.00 B) 10.44 C) 5.50 D) 4.31 E) 3.56

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Quizplus · Accepted Answer

The pH is determined by the first ionization of carbonic acid, as the second ionization is negligible. Using the formula for weak acid pH calculation: pH = -log(√(Ka1 × [H2CO3])), we find pH ≈ 3.56.

Determine the PH of a 0