Explain what is the equilibrium concentration of no2

Reference no: EM13229180

15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.496 M HNO2 (Ka for HNO2 = 4.0 × 10-4). What is the equilibrium concentration of NO2- ions?

A. 2.6 × 10-3 M
B. 1.7 × 10-4 M
C. 4.3 × 10-1 M
D. 5.1 × 10-2 M
E. none of these

Reference no: EM13229180

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