In a 0.20 M solution of a diprotic acid H2A (Ka1 = 1.3 × 10-5 and Ka2 = 2.7 × 10-10 at 25°C) ,what is the equilibrium concentration of A2-?
A) 7.3 × 10-6 M
B) 2.7 × 10-10 M
C) 1.6 × 10-3 M
D) 0.40 M
E) 0.20 M
Correct Answer:
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