Calculate the pH when 200.0 mL of a 1.00 M solution of H 2 A (K a1 = 1.0 × 10 -6 , K a2 = 1.0 × 10 -10 ) is titrated with the following volumes of 1.00 M NaOH.
-0 mL of 1.00 M NaOH
A) 3.00
B) 6.00
C) 0
D) 3.35
E) none of these

Question

Quizplus · Accepted Answer

The initial solution is a 1.00 M solution of HS1U1B12S1U1B0A, a weak acid. To find the pH, we use the first dissociation constant (Ka1 = 1.0 × 10^-6). The pH is calculated using the formula pH = -log(sqrt(Ka1 * C)), where C is the concentration of the acid. This gives a pH of approximately 3.00.

Calculate the PH When 200