Reference no: EM132753711
1. What information about a molecule can you gain from the Lewis structure? Be sure to answer only in terms of the Lewis structure and not VSEPR theory.
2. Why can't you determine the shape and polarity from Lewis structures alone? In other words, why must you apply VSEPR theory to a Lewis structure to determine shape and polarity?
3. Many students claim that constructing molecules helps them apply VSEPR theory to two dimensional Lewis structures. Discuss TWO advantages you experienced as you constructed three-dimensional models.
4. Explain how you used VSEPR theory to predict polarity. Your answer should include a discussion of the connection between electron geometry, molecular geometry and symmetry. Support your answer with examples from this lab. In other words, walk through the process of using the two geometries and symmetry to show how you determined a polar molecule was polar and a nonpolar molecule was nonpolar.
5. Explain the difference in polarity between NH4+ and NH3 based on differences in their electron geometries, molecular geometries and symmetries.
6. How are H3O+ and NH3 similar to one another? Base your response on similarities in their electron geometries, molecular geometries and symmetries.
7. Why are the polarities of CO2 and SO2 different? Discuss similarities in their formulas and differences in their electron geometries, molecular geometries and symmetries.
8. The solubility of a potential solute in a solvent depends on polarity. A rough rule of thumb for solubility is "like dissolves like," which means that substances with similar polarities will form solutions (mix well together). Excluding polyatomic ions, choose TWO substances from the lab that you think would mix well with water. Explain your choices in terms of the substances' and water's polarities.
9. When mixed, oil and water do not form a solution (they do not mix well). What does this tell you about oil's polarity? Explain. Choose TWO substances from the lab that you think would mix well with oil. Explain your choices in terms of the substances' polarities.