The structure of citric acid is shown. Place an asterisk next to the acidic hydrogen atom(s). H Answer Bank H :0: :0: H. H H ...... :0: ....... :0:

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The image depicts the molecular structure of citric acid. The task is to identify and place an asterisk next to the acidic hydrogen atom(s) within the structure. 

### Molecular Structure Details:

1. **Carbon Atoms (C):** There are six carbon atoms. They form the backbone of the citric acid structure.
   
2. **Hydrogen Atoms (H):** Various hydrogen atoms are bonded to the carbon atoms. These are potential candidates for acidic hydrogen atoms.

3. **Oxygen Atoms (O):** Oxygen atoms are bonded in a few significant configurations: 
   - In carbonyl groups (C=O).
   - As part of hydroxyl groups (O-H).
   
4. **Bonds:**
   - Single bonds (–) connect carbon to hydrogen and to some oxygen atoms.
   - Double bonds (=) connect carbon to certain oxygen atoms, forming carbonyl groups.

5. **Dots (·):** Represent lone pairs on the oxygen atoms, crucial for identifying acidity.

### Instructions:

- **Answer Bank:** Select an asterisk (*) from the provided answer bank.
- **Task:** Analyze the structure to identify the hydrogen atoms bonded to oxygen atoms in the hydroxyl groups, as these are considered acidic in citric acid. Place an asterisk next to such hydrogen atoms.

### Objective:
Understanding the acidic properties of citric acid in an organic chemistry context, particularly focusing on the acidity associated with its hydroxyl hydrogen atoms.
Transcribed Image Text:The image depicts the molecular structure of citric acid. The task is to identify and place an asterisk next to the acidic hydrogen atom(s) within the structure. ### Molecular Structure Details: 1. **Carbon Atoms (C):** There are six carbon atoms. They form the backbone of the citric acid structure. 2. **Hydrogen Atoms (H):** Various hydrogen atoms are bonded to the carbon atoms. These are potential candidates for acidic hydrogen atoms. 3. **Oxygen Atoms (O):** Oxygen atoms are bonded in a few significant configurations: - In carbonyl groups (C=O). - As part of hydroxyl groups (O-H). 4. **Bonds:** - Single bonds (–) connect carbon to hydrogen and to some oxygen atoms. - Double bonds (=) connect carbon to certain oxygen atoms, forming carbonyl groups. 5. **Dots (·):** Represent lone pairs on the oxygen atoms, crucial for identifying acidity. ### Instructions: - **Answer Bank:** Select an asterisk (*) from the provided answer bank. - **Task:** Analyze the structure to identify the hydrogen atoms bonded to oxygen atoms in the hydroxyl groups, as these are considered acidic in citric acid. Place an asterisk next to such hydrogen atoms. ### Objective: Understanding the acidic properties of citric acid in an organic chemistry context, particularly focusing on the acidity associated with its hydroxyl hydrogen atoms.
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