CF3 COOH CF3 COOH CF 3 COOH COOH

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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Determine which of the following carboxylic acids will be the most acidic by looking at their structures and why

CF3
COOH
CF3
COOH
CF 3
COOH
COOH
Transcribed Image Text:CF3 COOH CF3 COOH CF 3 COOH COOH
Expert Solution
Step 1: Introduction
  • According to Arrhenius concept, an acid is a substance i.e. when dissolved in water gives H+ ions
  • . Thus greater the number of H+ ions produced in the aqueous solution, the stronger is the acid.
  •  Greater is the dissociation constant of the weak acid (Ka), greater is the amount of H+ (aq) produced, therefore stronger is the acid. Thus, Ka values give a measure of the relative strengths of the weak acids & Also pKa = - log ( Ka )  
  • => Higher the Ka value of acid , lower will be the value of pKa of acid
  • When comparing two compounds, the more acidic compound will have a higher Ka and a lower pKa.
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