You have 75.0 mL of 0.17 M HA.After adding 30.0 mL of 0.10 M NaOH,the pH is 5.50.What is the Ka value of HA?
A) 3.2 × 10-6
B) 9.7 × 10-7
C) 0.31
D) 7.4 × 10-7
E) none of these
Correct Answer:
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