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Chapter 2: Q12P (page 57)

Estimate the pKa values of the following compounds.

(a)CH3CH2CH2NH2

(b)CH3CH2CH2OH

(c)CH3CH2COOH

(d)CH3CH2CH2NH3+

Short Answer

Expert verified

(a)40

(b) 50

(c)5

(c)10

Step by step solution

01

Understanding the pKa values.

The strength of an acid is indicated using pKa values. The greater the pKa value, the weaker is the acidity of an acid. High the pKa value indicates that the acid does not dissociate fully.

02

Estimating the pKa values for Subpart (a):

For CH3CH2CH2NH2 , the pKa value is 40.

03

Estimating the pKa values for Subpart (b):

For CH3CH2CH2OH , the pKa value is 50.

04

Estimating the pKa values for Subpart (c):

For CH3CH2COOH , the pKa value is .5

05

Estimating the pKa values for Subpart (d):

For CH3CH2CH2NH3+ , the pKa value is 10.

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Most popular questions from this chapter

Explain why HCl has a smaller dipole moment than HF, even though the H-Cl bond is longer than the H-F bond.

a. For each of the acid-base reactions in section 2.3, compare the pKa values of the acids on either side of the equilibrium arrows to prove that the equilibrium lies in the direction indicated. (The pKa values you need are found in section 2.3 or in problem 13)

b. Do the same for the acid-base reaction in section 2.1

a. Write an equation showing CH3OH reacting with NH3and an equation showing reacting with HCl.

b. Write an equation showing NH3reacting as an acid with CH3O-and an equation showing it reacting as a base with HBr.

a.What is the conjugate acid of each of the following?

1. NH3 2. Cl- 3. HO- 4. H2O

b.What is the conjugate base of each of the following?

1. NH3 2. HBr 3. HNO3 4. H2O

Which is the stronger acid?

a. CH3CH3 or HC 鈮H

b. H2C= CH2or HC鈮� CH

c. H2C =CH2 or CH3CH3
See all solutions

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