A student prepares a solution by combining 100 mL of 0.30 M HNO2(aq) and 100 mL of 0.30 M KNO2(aq). — Acids and Bases Chemistry Question
Question
A student prepares a solution by combining 100 mL of 0.30 M HNO2(aq) and 100 mL of 0.30 M KNO2(aq). Which of the following equations represents the reaction that best helps to explain why adding a few drops of 1.0 M HCl(aq) does not significantly change the pH of the solution?
A.
K+(aq) + Cl-(aq) → KCl(s)
B.
HNO2(aq) → H+(aq) + NO2-(aq)
C.
H+(aq) + OH-(aq) → H2O(l)
D.✓ Correct
H+(aq) + NO2-(aq) → HNO2(aq)
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