```markdown ### Experiment 10 – Polarity and Solubility #### Pre-Laboratory Assignment **Name:** Evelyn Dumas **Section:** 004 **Date:** 11/19 --- 1. **Define the terms below.** a. **Immiscible:** - _Definition:_ Two liquids that do not mix. b. **Hydrocarbon:** - _Definition:_ Made up of strictly carbons and hydrogens, which makes it easy to determine their polarity since these are non-polar. All hydrocarbons are automatically non-polar. 2. **Select any functional group (Consult Table 3 in Lab 9) and indicate its polarity by using electronegativity values, partial charges, and the direction of the dipole moment (from δ+ to δ-):** - **Example:** The S-H group: - Electronegativity values: \(2.5 - 2.1\) - Diagram: \( \delta^- \text{S} - \text{H} \delta^+ \) 3. **What is the general rule of solubility? Explain briefly what it means!** - _Explanation:_ Like dissolves like, with the "likeness" of two substances being based on their polarity. Polar substances will dissolve other polar substances, and the same with non-polar substances. 4. **Consider the following molecule:** ![Molecule diagram showing an amine group connected to a carbonyl group](diagram) a. **Redraw the Lewis structure of this molecule (show the bonds for each of the hydrogen atoms on N; show the C-atom that forms the C=O bond); add all lone pairs. Using the Pauling electronegativity scale, determine which bonds are polar; show them on the structure using the δ+/δ- notation.** b. **Is this molecule polar? (You need to determine the polarity of each part of the molecule and then determine whether they cancel out; if they all cancel out, the molecule would be non-polar; if they do not cancel, the molecule should be polar.) Explain briefly why or why not.** --- _Page 137_ ``` Note: The visual representation of the molecule is described, but not transcribed as a specific image due to its pictorial nature. **Experiment 10 – Polarity and Solubility** **c.** What type of intermolecular forces should exist between two of these molecules? *Handwritten answer:* dipole-dipole **d.** Will this molecule be soluble in water, H₂O? *Explain briefly why or why not.* *Note:* The image does not show any graphs or diagrams. The text provides a question related to intermolecular forces and solubility in the context of a chemistry experiment focusing on polarity.