Question

Acetic acid (CH3COOH) and trifluoroacetic acid (CF3COOH) are shown by these particulate models. The K, for trifluoroacetic acid is 10⁴times greater than acetic acid. Use the models to account for the differences in magnitude for the K, constant. The yellow atoms are fluorine, the red atoms are oxygen, the black atoms are carbon, and the white atoms are hydrogen.

 Part 1

Write the formulas for the conjugate bases for the two structures 

The conjugate base of acetic acid

The conjugate base of trifluoroacetic acid

 Part 2 

Which of the following item(s) explain the differences between the Ky values Choose one or more: 

A. The oxidation state for oxygen in trifluoroacetate is more negative than the oxidation state for oxygen in acetate 

B. The trifluoroacetate molecule has more resonance structures than the acetate molecule 

C. The electron-withdrawing fluorine atoms pull electron density from the oxygen in trifluoroacetate. The negative charge is more stabilized in trifluoroacetate by this effect. 

D. The negative charge is on the more electronegative fluorine atom in trifluoroacetate

Answer 1