Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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1. What is wrong with this Lewis structure? The shape is not of concern.

2. Label the formal charges on each atom in each resonance structure below.

### Question: Analyzing Lewis Structures

#### Problem 1:
**Question:**  
What is wrong with this Lewis structure? The shape is not of concern.

**Image Description:**  
The Lewis structure consists of three carbon atoms connected in a chain. The first carbon is bonded to three hydrogen atoms, the second carbon has a double bond with the third carbon and a single bond with a hydrogen atom. The third carbon is bonded with a hydrogen atom.

**Notes:**  
Analyze the bonds and the valence electrons of each atom to determine any inaccuracies.

#### Problem 2:
**Question:**  
Label the formal charges on each atom in each resonance structure below.

**Image Description:**  
Resonance structure diagram showing a compound with a sequence of atoms and possible resonance forms.

**Instructions:**  
Click on "Show Your Work" to proceed with labeling the formal charges on each atom depicted in the resonance structures provided. Pay close attention to electron distribution and ensure appropriate calculations are made for formal charges.

**Note:**  
Formal charge calculations are based on the formula:
\[ \text{Formal Charge} = \text{Valence Electrons} - \text{Non-bonding Electrons} - \frac{\text{Bonding Electrons}}{2} \]
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Transcribed Image Text:### Question: Analyzing Lewis Structures #### Problem 1: **Question:** What is wrong with this Lewis structure? The shape is not of concern. **Image Description:** The Lewis structure consists of three carbon atoms connected in a chain. The first carbon is bonded to three hydrogen atoms, the second carbon has a double bond with the third carbon and a single bond with a hydrogen atom. The third carbon is bonded with a hydrogen atom. **Notes:** Analyze the bonds and the valence electrons of each atom to determine any inaccuracies. #### Problem 2: **Question:** Label the formal charges on each atom in each resonance structure below. **Image Description:** Resonance structure diagram showing a compound with a sequence of atoms and possible resonance forms. **Instructions:** Click on "Show Your Work" to proceed with labeling the formal charges on each atom depicted in the resonance structures provided. Pay close attention to electron distribution and ensure appropriate calculations are made for formal charges. **Note:** Formal charge calculations are based on the formula: \[ \text{Formal Charge} = \text{Valence Electrons} - \text{Non-bonding Electrons} - \frac{\text{Bonding Electrons}}{2} \]
### Resonance Structures of Sulfur Dioxide (SO₂)

In the study of sulfur dioxide (SO₂), it is crucial to understand the concept of resonance structures. Resonance structures are different Lewis structures that represent the same molecule. They illustrate the delocalization of electrons within the molecule. Here, we present the resonance structures of sulfur dioxide.

**Diagram Description:**

The image demonstrates three resonance structures of the SO₂ molecule with arrows indicating the resonance between the structures:

1. **First Resonance Structure:**
   - The sulfur atom (S) is double-bonded to two oxygen atoms (O).
   - The sulfur atom bears a formal charge of zero.
   - Each oxygen atom has four lone electrons (two lone pairs), with the usual formal charge of zero.

2. **Double Arrow Explanation:**
   - A double-headed arrow between the structures indicates that these are resonance forms of the same molecule.
   - This signifies that the actual structure of the molecule is a hybrid of these forms, with the delocalized electrons contributing to the overall stability of the molecule.

3. **Second Resonance Structure:**
   - One oxygen atom forms a double bond with sulfur, while the other oxygen forms a single bond with sulfur and carries a negative formal charge.
   - The sulfur atom in this structure has a positive formal charge, due to the lack of electron density compared to the first structure.
   - The single-bonded oxygen has six lone electrons (three lone pairs), and the double-bonded oxygen has four lone electrons (two lone pairs).

4. **Third Resonance Structure:**
   - Similar to the second structure but with the positions of the single and double bonds reversed.
   - One oxygen atom forms a single bond with sulfur and carries a negative formal charge.
   - The sulfur atom has a positive formal charge, as in the second structure.
   - The single-bonded oxygen has six lone electrons (three lone pairs), and the double-bonded oxygen has four lone electrons (two lone pairs).

**Significance:**
The resonance structures indicate that the electron pair (or lone pair) on the sulfur atom can be delocalized across the molecule, resulting in partial double-bond character for both S-O bonds. This delocalization increases the stability of the molecule. 

In essence, neither of the individual resonance structures fully or accurately depicts the actual bonding in SO₂; rather, the actual structure is a resonance hybrid of all
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Transcribed Image Text:### Resonance Structures of Sulfur Dioxide (SO₂) In the study of sulfur dioxide (SO₂), it is crucial to understand the concept of resonance structures. Resonance structures are different Lewis structures that represent the same molecule. They illustrate the delocalization of electrons within the molecule. Here, we present the resonance structures of sulfur dioxide. **Diagram Description:** The image demonstrates three resonance structures of the SO₂ molecule with arrows indicating the resonance between the structures: 1. **First Resonance Structure:** - The sulfur atom (S) is double-bonded to two oxygen atoms (O). - The sulfur atom bears a formal charge of zero. - Each oxygen atom has four lone electrons (two lone pairs), with the usual formal charge of zero. 2. **Double Arrow Explanation:** - A double-headed arrow between the structures indicates that these are resonance forms of the same molecule. - This signifies that the actual structure of the molecule is a hybrid of these forms, with the delocalized electrons contributing to the overall stability of the molecule. 3. **Second Resonance Structure:** - One oxygen atom forms a double bond with sulfur, while the other oxygen forms a single bond with sulfur and carries a negative formal charge. - The sulfur atom in this structure has a positive formal charge, due to the lack of electron density compared to the first structure. - The single-bonded oxygen has six lone electrons (three lone pairs), and the double-bonded oxygen has four lone electrons (two lone pairs). 4. **Third Resonance Structure:** - Similar to the second structure but with the positions of the single and double bonds reversed. - One oxygen atom forms a single bond with sulfur and carries a negative formal charge. - The sulfur atom has a positive formal charge, as in the second structure. - The single-bonded oxygen has six lone electrons (three lone pairs), and the double-bonded oxygen has four lone electrons (two lone pairs). **Significance:** The resonance structures indicate that the electron pair (or lone pair) on the sulfur atom can be delocalized across the molecule, resulting in partial double-bond character for both S-O bonds. This delocalization increases the stability of the molecule. In essence, neither of the individual resonance structures fully or accurately depicts the actual bonding in SO₂; rather, the actual structure is a resonance hybrid of all
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