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PH=3.15 c. What is the % dissociation of the formic acid? COOH DOLLS 25 = 1.77x10 3.25M (ac HCO + + OH(aq) 025- (aq) ▸ -X100

PH=3.15 c. What is the % dissociation of the formic acid? COOH DOLLS 25 = 1.77x10 3.25M (ac HCO + + OH(aq) 025- (aq) ▸ -X100

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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3 3. Formic acid, HCOOH (K₂ = 1.77 x 104) is naturally found in the venom of bee stings, and is used synthetically as a preservative in livestock feed. a. Write the K, expression for formic acid. Kax K₁=1.0 x· 10-14 077x10-4 x K₁=1.0×10-14 [CO] [OH-] Kb = 5.6×10-11 ко [HCOOHIL [0.00660][0.00665] [0.243] 1.82x10²4 -1.78×10-4 1682x10-4-97.25 100-9720-2.75% "X100 - (0) HC (69) b. Calculate the pH of a 0.25 M solution of formic acid. 1.77x10-4 = (0,25M) [H [H+]=7.08×10-4 PH=-10g (7.08x10-41) | PH=3.15 c. What is the % dissociation of the formic acid? HCOOH 0.25M -X 0.25-x HCO + + OH XX ka= ta z DOLLS .25 0 (aq) 0.25 025-1-77x10-4 x²=4.425x10-5 x=0.00665 [H-0005 X [HCCOHT=0.243 LHCO1=0.00665 px x X₁²
Transcribed Image Text:3 3. Formic acid, HCOOH (K₂ = 1.77 x 104) is naturally found in the venom of bee stings, and is used synthetically as a preservative in livestock feed. a. Write the K, expression for formic acid. Kax K₁=1.0 x· 10-14 077x10-4 x K₁=1.0×10-14 [CO] [OH-] Kb = 5.6×10-11 ко [HCOOHIL [0.00660][0.00665] [0.243] 1.82x10²4 -1.78×10-4 1682x10-4-97.25 100-9720-2.75% "X100 - (0) HC (69) b. Calculate the pH of a 0.25 M solution of formic acid. 1.77x10-4 = (0,25M) [H [H+]=7.08×10-4 PH=-10g (7.08x10-41) | PH=3.15 c. What is the % dissociation of the formic acid? HCOOH 0.25M -X 0.25-x HCO + + OH XX ka= ta z DOLLS .25 0 (aq) 0.25 025-1-77x10-4 x²=4.425x10-5 x=0.00665 [H-0005 X [HCCOHT=0.243 LHCO1=0.00665 px x X₁²
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