(a) Interpretation: For the given molecule, the species, a lone pair of electrons or a N-H bond that occupies more space is to be determined. Concept introduction: A monosubstituted cyclohexane is lower in energy (more stable) when the substituent occupies an equatorial position. The equatorial conformer is more stable than the axial conformer because there is more room for the substituent in the equatorial position. The bulkier the substituent on a cyclohexane ring, the more favored is the chair conformation with the substituent in the equatorial position.

Question

An unknown weak acid with a concentration of 0.410 M has a pH of 5.600. What is the Ka of the weak acid?

Answer 1

Question

Chapter 4, Problem 4.39P

Interpretation Introduction

(a)

Interpretation:

For the given molecule, the species, a lone pair of electrons or a N-H bond that occupies more space is to be determined.

Concept introduction:

A monosubstituted cyclohexane is lower in energy (more stable) when the substituent occupies an equatorial position. The equatorial conformer is more stable than the axial conformer because there is more room for the substituent in the equatorial position. The bulkier the substituent on a cyclohexane ring, the more favored is the chair conformation with the substituent in the equatorial position.

Interpretation Introduction

(b)

Interpretation:

For the given molecule, the species, a lone pair of electrons or CH3 group that occupies more space is to be determined.

Concept introduction:

A monosubstituted cyclohexane is lower in energy (more stable) when the substituent occupies an equatorial position. The bulkier the substituent on a cyclohexane ring, the more favored is the chair conformation with the substituent in the equatorial position.

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An unknown weak acid with a concentration of 0.410 M has a pH of 5.600. What is the Ka of the weak acid?

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