In the following equation HNO2 (aq) + H2O (l) ↔ H3O+ (aq) + NO2-(aq), 0.37 M of nitrous acid was found in the resulting aqueous solution. If Ka for HNO2 is 4.5 x10 -4, what is the pH of the HNO2 solution?     1.75     1.78     1.88     1.9

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter14: Acids And Bases
Section14.7: Problem Solving Using Ka And Kb
Problem 14.19E
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In the following equation HNO2 (aq) + H2O (l) ↔ H3O+ (aq) + NO2-(aq), 0.37 M of nitrous acid was found in the resulting aqueous solution. If Ka for HNO2 is 4.5 x10 -4, what is the pH of the HNO2 solution?

   

1.75

   

1.78

   

1.88

   

1.9

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