Multiple Choice
12.4 mL of 0.25 M HCl is added to a 120.0-mL sample of 0.220 M HNO2 (Ka for HNO2 = 4.0 × 10-4) . What is the equilibrium concentration of NO2- ions?
A) 3.4 × 10-3 M
B) 2.3 × 10-2 M
C) 3.9 × 10-3 M
D) 4.7 × 10-4 M
E) 9.4 × 10-3 M
Correct Answer:
Verified
Correct Answer:
Verified
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