The equilibrium constant for the reaction of formic acid and sodium hydroxide is 1.8 10 10

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The equilibrium constant for the reaction of formic acid and sodium hydroxide is 1.8 × 1010 (page 726). Confirm this value.

Data given on Page 726

Consider the reaction of the naturally occurring weak acid formic acid, HCO2H, with sodium hydroxide. The net ionic equation isHCOH(aq) + OH-(aq) M H0 () + HCO (aq)

In this reaction, OH is a much stronger base than HCO2 (Kb = 5.6 × 10−11), and the reaction is predicted to proceed to the right. If equal amounts of weak acid and base are mixed, the final solution will contain sodium formate (NaHCO2), a salt that is 100% dissociated in water. The Na+ ion is a Group IA cation and so gives a neutral solution. The formate ion, however, is the conjugate base of a weak acid (Table 16.2), so the solution is basic. 

Increasing Acid Strength TABLE 16.2 Acid Name Perchloric acid Sulfuric acid Hydrochloric acid Nitric acid

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Chemistry And Chemical Reactivity

ISBN: 9780357001172

10th Edition

Authors: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

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