3. Which of the labelled hydrogens in vitamin C (L-ascorbic acid) is the most acidic? Explain your choice by referring to Lewis structures. a HO b HO- CH d HO OH Vitamin C
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![**Question 3: The Acidity of Hydrogens in Vitamin C**
**Text:**
3. Which of the labelled hydrogens in vitamin C (L-ascorbic acid) is the most acidic? Explain your choice by referring to Lewis structures.
**Diagram Explanation:**
The image includes the molecular structure of Vitamin C (L-ascorbic acid) with labeled hydrogen atoms to identify which is the most acidic:
- The molecular structure is depicted in a two-dimensional Lewis diagram.
- The structure consists of a five-membered ring with hydroxyl (OH) groups attached.
- The labeled hydrogens are as follows:
- Hydrogen 'a' attached to a hydroxyl group on the ring.
- Hydrogen 'b' attached to another hydroxyl group on the ring.
- Hydrogen 'c' attached to a carbon atom in the ring (represented as H'').
- Hydrogen 'd' attached to an adjacent hydroxyl group on the ring.
- Hydrogen 'e' attached to a hydroxyl group at a different position on the ring.
Consider the resonance and electron-withdrawing effects when identifying the most acidic hydrogen.
**Prompt to Students:**
Evaluate the acidity of each labeled hydrogen by constructing the respective Lewis structures and considering factors such as resonance stabilization and inductive effects. This will aid in identifying which hydrogen is the most acidic in vitamin C.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F06f0fbe0-f317-435d-a2b5-90be2d5876f1%2F4071ae16-d8f1-490e-b6b0-64767da9c91e%2Fk1i5k0o_processed.png&w=3840&q=75)
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