HC2H3 O2 (aq) 1.8x10-5

Chemistry
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**Acid Ionization Constants and Conjugate Base Strength**

To determine the strongest conjugate base, consider the given acid ionization constants (\(K_a\)) for the following acids:

| **Acid**          | **\(K_a\)**     |
|------------------|-----------------|
| HF(aq)           | \(3.5 \times 10^{-4}\)  |
| HC\(_7\)H\(_5\)O\(_2\)(aq) | \(6.5 \times 10^{-5}\)  |
| HClO\(_2\)(aq)   | \(1.1 \times 10^{-2}\)  |
| HC\(_2\)H\(_3\)O\(_2\)(aq) | \(1.8 \times 10^{-5}\)  |

### Explanation:
- **\(K_a\) value** represents the acid strength: the lower the \(K_a\), the weaker the acid. 
- **Conjugate base strength** is inversely related to acid strength: weaker acids have stronger conjugate bases.

### Conclusion:
To identify the strongest conjugate base, find the acid with the lowest \(K_a\) value. Here, HC\(_2\)H\(_3\)O\(_2\)(aq) with \(K_a = 1.8 \times 10^{-5}\) has the lowest \(K_a\), indicating its conjugate base is the strongest.

**Note:** You may want to reference Section 16.4 for further details on this topic.
Transcribed Image Text:**Acid Ionization Constants and Conjugate Base Strength** To determine the strongest conjugate base, consider the given acid ionization constants (\(K_a\)) for the following acids: | **Acid** | **\(K_a\)** | |------------------|-----------------| | HF(aq) | \(3.5 \times 10^{-4}\) | | HC\(_7\)H\(_5\)O\(_2\)(aq) | \(6.5 \times 10^{-5}\) | | HClO\(_2\)(aq) | \(1.1 \times 10^{-2}\) | | HC\(_2\)H\(_3\)O\(_2\)(aq) | \(1.8 \times 10^{-5}\) | ### Explanation: - **\(K_a\) value** represents the acid strength: the lower the \(K_a\), the weaker the acid. - **Conjugate base strength** is inversely related to acid strength: weaker acids have stronger conjugate bases. ### Conclusion: To identify the strongest conjugate base, find the acid with the lowest \(K_a\) value. Here, HC\(_2\)H\(_3\)O\(_2\)(aq) with \(K_a = 1.8 \times 10^{-5}\) has the lowest \(K_a\), indicating its conjugate base is the strongest. **Note:** You may want to reference Section 16.4 for further details on this topic.
Here is a list of anions in aqueous solution:

- \( \text{C}_7\text{H}_5\text{O}_2^- \) (aq)
- \( \text{C}_2\text{H}_3\text{O}_2^- \) (aq)
- \( \text{F}^- \) (aq)
- \( \text{ClO}_2^- \) (aq)

Each option represents an anion dissolved in water, indicated with (aq).
Transcribed Image Text:Here is a list of anions in aqueous solution: - \( \text{C}_7\text{H}_5\text{O}_2^- \) (aq) - \( \text{C}_2\text{H}_3\text{O}_2^- \) (aq) - \( \text{F}^- \) (aq) - \( \text{ClO}_2^- \) (aq) Each option represents an anion dissolved in water, indicated with (aq).
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