Which of the compounds below form water soluble salts (quantitatively) when added to a saturated aqueous sodium bicarbonate solution? Consider the pKa values of the functional groups and the acid/base strength of bicarbonate itself. OH „CO2H `OCH3 b. OH d. а. с.

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**Question b:**

Which of the compounds below form water soluble salts (quantitatively) when added to a saturated aqueous sodium bicarbonate solution? Consider the \( pK_a \) values of the functional groups and the acid/base strength of bicarbonate itself.

**Compounds:**

- **a.** Benzoic acid \(\text{(C}_6\text{H}_5\text{CO}_2\text{H)}\)
- **b.** Hydroxymethoxybenzene \(\text{(OH attached to benzene with an OCH}_3\text{ group)}\)
- **c.** Pyridine with a piperidine ring
- **d.** 2-hydroxycyclohexanone \(\text{(a carbonyl and hydroxyl group on a cyclohexane ring)}\)

**Explanation of Diagrams:**

- **Compound a:** Shows a benzene ring with a carboxyl group (\(\text{CO}_2\text{H}\)) attached.
- **Compound b:** Displays a benzene ring with a hydroxyl group (\(\text{OH}\)) and a methoxy group (\(\text{OCH}_3\)).
- **Compound c:** Consists of a pyridine ring bonded to a secondary amine-containing ring (piperidine).
- **Compound d:** Features a cyclohexane ring with a ketone (\(=\text{O}\)) and a hydroxyl group (\(\text{OH}\)) positioned on adjacent carbons.
Transcribed Image Text:**Question b:** Which of the compounds below form water soluble salts (quantitatively) when added to a saturated aqueous sodium bicarbonate solution? Consider the \( pK_a \) values of the functional groups and the acid/base strength of bicarbonate itself. **Compounds:** - **a.** Benzoic acid \(\text{(C}_6\text{H}_5\text{CO}_2\text{H)}\) - **b.** Hydroxymethoxybenzene \(\text{(OH attached to benzene with an OCH}_3\text{ group)}\) - **c.** Pyridine with a piperidine ring - **d.** 2-hydroxycyclohexanone \(\text{(a carbonyl and hydroxyl group on a cyclohexane ring)}\) **Explanation of Diagrams:** - **Compound a:** Shows a benzene ring with a carboxyl group (\(\text{CO}_2\text{H}\)) attached. - **Compound b:** Displays a benzene ring with a hydroxyl group (\(\text{OH}\)) and a methoxy group (\(\text{OCH}_3\)). - **Compound c:** Consists of a pyridine ring bonded to a secondary amine-containing ring (piperidine). - **Compound d:** Features a cyclohexane ring with a ketone (\(=\text{O}\)) and a hydroxyl group (\(\text{OH}\)) positioned on adjacent carbons.
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