Questions: Report Sheet for EXP9 [1] Total Valence Electron Count (show work) (C) ()^-4(2)(C2 H4 Cl2) H^'(4) Cl(7)= 20 valence Electrons [2] Lewis Dot Structure and Draw the structure of any Isomers (same number and types of atoms but different bonding) [3] Molecular Geometry 1. Name 2. Draw the structure 3. Bond Angle Value [4] Polar Bond(s)? [5] Polar or Non-polar molecule? Why? [6] List chemical formulas of molecules with similar geometry and polarity

Solution Steps

To find the total valence electron count for dichloroethane (\(\mathrm{C}_2\mathrm{H}_4\mathrm{Cl}_2\)):

• Carbon (C) has 4 valence electrons. There are 2 carbon atoms: \(2 \times 4 = 8\).
• Hydrogen (H) has 1 valence electron. There are 4 hydrogen atoms: \(4 \times 1 = 4\).
• Chlorine (Cl) has 7 valence electrons. There are 2 chlorine atoms: \(2 \times 7 = 14\).

Total valence electrons: \(8 + 4 + 14 = 26\).

\[ \boxed{26 \text{ valence electrons}} \]

The Lewis dot structure for dichloroethane (\(\mathrm{C}_2\mathrm{H}_4\mathrm{Cl}_2\)) is:

\[ \begin{array}{c} \mathrm{H} \\ | \\ \mathrm{H} - \mathrm{C} - \mathrm{C} - \mathrm{H} \\ | \\ \mathrm{Cl} \quad \mathrm{Cl} \end{array} \]

For isomers, dichloroethane can have the following structure:

\[ \begin{array}{c} \mathrm{H} \\ | \\ \mathrm{Cl} - \mathrm{C} - \mathrm{C} - \mathrm{H} \\ | \\ \mathrm{H} \quad \mathrm{Cl} \end{array} \]

\[ \boxed{\text{Lewis Dot Structure and Isomers drawn}} \]

1. Name: The molecular geometry around each carbon atom in dichloroethane is tetrahedral.
2. Draw the structure: The structure is already drawn in Step 2.
3. Bond Angle Value: The bond angle in a tetrahedral geometry is approximately \(109.5^\circ\).

\[ \boxed{\text{Tetrahedral, Bond Angle } 109.5^\circ} \]

Final Answer