3. Acids and Bases
pKa
19PRACTICE PROBLEM
Identify the stronger base in each of the following pairs:
(i) C6H5COO– or C6H11COO– (pKa C6H5COOH = 4.2; pKa C6H11COOH = 4.9)
(ii) CH3O– or –NHCH3 (pKa CH3OH = 15.5; pKa CH3NH2 = 40)
(iii) CH3CH2OH or H2O (pKa CH3CH2O+H2 = –2.4; pKa H3O+ = –1.7)
Identify the stronger base in each of the following pairs:
(i) C6H5COO– or C6H11COO– (pKa C6H5COOH = 4.2; pKa C6H11COOH = 4.9)
(ii) CH3O– or –NHCH3 (pKa CH3OH = 15.5; pKa CH3NH2 = 40)
(iii) CH3CH2OH or H2O (pKa CH3CH2O+H2 = –2.4; pKa H3O+ = –1.7)