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3 years ago
15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.478 M HNO2 (Ka for HNO2 = 4.0 × 10–4). What is the equilibrium concentration of NO2– ions?


▸ 2.5 × 10–3M

▸ 1.7 × 10–4M

▸ 4.2 × 10–1M

▸ 5.0 × 10–2M

▸ None of these are correct.
Textbook 
Chemistry: An Atoms First Approach

Chemistry: An Atoms First Approach


Edition: 3rd
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