Nitrous acid, HNO2, has Ka = 4.5 × 10–4. What is the best description of the species present in a 0. — Acids and Bases Chemistry Question
Question
Nitrous acid, HNO2, has Ka = 4.5 × 10–4. What is the best description of the species present in a 0.1 M solution of nitrous acid?
A.✓ Correct
HNO2(aq) is the predominant species; much smaller amounts of H+(aq) and NO2–(aq) exist.
B.
H+(aq) and NO2–(aq) are the predominant species; much smaller amounts of HNO2(aq) exist.
C.
Only H+(aq) and NO2–(aq) are present in measurable amounts.
D.
HNO2(aq), H+(aq), and NO2–(aq) are all present in comparable amounts.
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