AP Chemistry
8.6 Molecular Structure of Acids and Bases
8.3 Weak Acid and Base Equilibria
A student investigates the relative base strengths of three nitrogen-containing compounds in aqueous solution at \(298\text{ K}\). The student records the experimental data shown in the table below.
Which of the following statements correctly compares the base strength of acetamide to that of ethylamine and provides the valid structural justification?
| Compound name | Molecular formula | Structural formula | \(K_b\) at \(298\text{ K}\) |
|---|---|---|---|
| Ethylamine | \(\text{C}_2\text{H}_7\text{N}\) | \(\text{CH}_3\text{CH}_2\text{NH}_2\) | \(5.0 \times 10^{-4}\) |
| Ammonia | \(\text{NH}_3\) | \(\text{NH}_3\) | \(1.8 \times 10^{-5}\) |
| Acetamide | \(\text{C}_2\text{H}_5\text{NO}\) | \(\text{CH}_3\text{CONH}_2\) | \(1.0 \times 10^{-14}\) |
Which of the following statements correctly compares the base strength of acetamide to that of ethylamine and provides the valid structural justification?
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