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Chapter 2: 2.38 (page 85)

What is the conjugate acid of each base?
a. ${HCO}_{3}^{-}$
b.
c.
d.

Short Answer

Expert verified

a. $H_{2} {CO}_{3}$

b. role="math" localid="1649075555384" ${CH}_{3} {CH}_{2} {CH}_{2} \overset{+}{N} H_{2} {CH}_{3}$

c. ${CH}_{3} \overset{+}{O} {HCH}_{3}$

d. ${CH}_{3} COOH$

Step by step solution

01

Base

A base can abstract the acidic proton from the acid.

02

Conjugate acid

The conjugate acid is formed through the proton abstraction by a base.

03

Formation of the conjugate acid

a.The base ${HCO}_{3}^{-}$ abstracts the proton and forms its conjugate acid $H_{2} {CO}_{3}$ .

${HCO}_{3}^{-} \overset{H^{+}}{鈫�} H_{2} {CO}_{3}$

b. The base ${CH}_{3} {CH}_{2} {CH}_{2} {NHCH}_{3}$ abstracts the proton and forms its conjugate acid ${CH}_{3} {CH}_{2} {CH}_{2} \overset{+}{N} H_{2} {CH}_{3}$ .

Formation of a conjugate acid

c.The base ${CH}_{3} {OCH}_{3}$ abstracts the proton and forms its conjugate acid ${CH}_{3} \overset{+}{O} {HCH}_{3}$ .

Formation of a conjugate acid

d.The base ${CH}_{3} {COO}^{-}$ abstracts the proton and forms its conjugate acid ${CH}_{3} COOH$ .

Formation of a conjugate acid

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Most popular questions from this chapter

Rank the following ions in the order of increasing basicity:

a. ${CH}_{3} \bar{C} H_{2} {,CH}_{3} O^{-} {,CH}_{3} \bar{N} H$

b. ${CH}_{3}^{-} {,HO}^{鈥�} {,Br}^{鈥�}$

c.

d.

Which H atom in vitamin C (ascorbic acid) is most acidic?

DBU, 1,8-diazabicyclo $[5.4.0]$ undec-7-ene, is a base we will encounter in elimination reactions in Chapter 8. Which N atom is more basic in DBU? Explain your choice.

Rank the compounds in each group in order of increasing acidity.

a.

b.

c.

The ${pK}_{a}$ of three C-H bonds is given below.

a. For each compound, draw the conjugate base, including all possible resonance structures.

b. Explain the observed trend in ${pK}_{a}$ .

See all solutions

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