Question

Oxalic acid, H2C2O4 has acid dissociation constants Ka1 = 5.9 10-2 and Ka2 = 6.4 10-5. What is the pH after 20.00 mL of 0.0500 M NaOH is added to 5.00 mL of 0.2000 M H2C2O4?
A) 1.23
B) 2.10
C) 2.70
D) 4.19

Answer

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