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Chapter 2: 2.7 (page 66)

Which compound in each pair is the strongest acid?
a.
or
b.
or

Short Answer

Expert verified

a. Ethanol is a stronger compound.

b. Phenol is a stronger compound.

Step by step solution

01

Acids

Acids take part in numerous reactions in chemistry. They can be strong or weak and their definition varies as per the theories provided.

Hydrogen ions are liberated when acids are in contact with water which is an important characteristic of acid.

02

Comparison of compounds in a

The ${pK}_{a}$ values of propane and ethanol are 50 and 16, respectively. The compound with a lower ${pK}_{a}$ value is a stronger acid.

As ethanol has a lower ${pK}_{a}$ value than propane, it is a stronger acid.

03

Comparison of compounds in b

The $K_{a}$ values of phenol and toluene are $10^{- 10}$ and $10^{- 41}$ , respectively. The compound with a higher _{$K_{a}$} value is a strong acid.

As phenol has a higher $K_{a}$ value than toluene, it is a stronger acid.

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Most popular questions from this chapter

Estimate the ${pK}_{a}$ of each of the indicated bonds.

a.

b.

c.

Acetonitrile $({CH}_{3} CN)$ has a ${pK}_{a}$ of 25, making it more acidic than many other compounds having only C-H bonds. Draw Lewis structures for acetonitrile and its conjugate base. Use resonance structures to account for the acidity of acetonitrile.

Amphetamine is a powerful stimulant of the central nervous system.

a. Which proton in amphetamine is most acidic? b. What products are formed when amphetamine is treated with NaH? c. What products are formed when amphetamine is treated with HCl?

Label the Lewis acid and Lewis base in each reaction. Use curved arrows to show the movement of electron pairs.

a.

b.

Label each statement as True or False.

a. ${CH}_{3} {CH}_{2}^{+}$ is the conjugate acid of ${CH}_{2} = {CH}_{2}$ .

b. ${CH}_{3} {CH}_{2}^{-}$ is the conjugate base of ${CH}_{3} {CH}_{2}^{+}$ .

c. ${CH}_{2} = {CH}_{2}$ is the conjugate base of ${CH}_{3} {CH}_{2}^{-}$ .

d. ${CH}_{2} = {CH}^{-}$ is the conjugate base of ${CH}_{2} = {CH}_{2}$ .

e. ${CH}_{3} {CH}_{3}$ is the conjugate acid of ${CH}_{3} {CH}_{2}^{-}$ .

See all solutions

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