What is the pH of a 0. 40 mol L^-1 (H₂Se) solution that has the stepwise dissociation constants K_a1 = 1.3 × 10^-4 and K_a2=1.0 x10^-11 ? A) 2. 14 B) 3.89 C) 4. 28 D) 5. 57

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Quizplus · Accepted Answer

The pH is primarily determined by the first dissociation constant (Ka1) because it is much larger than Ka2. Using the formula pH = -log[H+], where [H+] is approximately equal to the square root of (Ka1 * concentration), we find pH ≈ 2.14.

What Is the PH of a 0