Question

6.9 Explain the relative acidities of the following carboxylic acids of Lewis FCH,CO,H (pK, 2.59), FCHCO, H (pK, 1.34),FCCo,H (pk,-0.6) H) The 6.10 Explain the relative acidities of the following carboxylic acids. of the nductive to for FCH,CO,H (pK, 2.59),CICH,CO,H (pK, 2.86) BrCH,CO,H (pK, 2.90), ICH,CO,H (pk, 3.18) 6.11 Explain the relative acidities of the following alcohols (pKa 16.1) (pKa 13.6) 6.12 Explain the relative acidities of the following alcohols. OH (pK, 15.5) OH (pK, 11) m(s) of followi 6.13 Explain why m-fluorobenzoic acid (pK,-3.86) is stronger than p-fluorobenzoic acid (pK, 4.14) 6.14 Explain the relative acidities of the following

Answer 1

As we know that with the decrease of pka acidity increases and vice-versa.

6.9. A/C to Inductive effect, with the increasing electronegative Fluorine atoms, acidity increases. Hence trifluoro acetic acid is more acidic.

6.10. greater the Electronegativityity of F , greater is the acidity.

Hence fluoro acetic acid is more acidic.

6.11. greater the Electronegativityity of Carbon ,more the acidity. Electronegativity of Carbon:sp>sp2>sp3

Hence alkyne containing alcohol is more acidic.

6.12. same explanation as above

6.13. F at meta position shows -I effect (which increases the acidity) hence m-fluorobenzoic acid is more acidic.