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Chapter 11: Q11.2-10E (page 646)
Explain why solutions of HBr in benzene (a nonpolar solvent) are nonconductive, while solutions in water (a polar solvent) are conductive.
Conductive means to produce electricity
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What is osmotic pressure of a solution of bovine insulin (molar mass,\({\bf{5700}}{\rm{ }}{\bf{g}}{\rm{ }}{\bf{mo}}{{\bf{l}}^{ - {\bf{1}}}}\)) at 18 °C if 100.0 mL of the solution contains 0.103 g of the insulin?
Distinguish between dispersion methods and condensation methods for preparing colloidal systems.
The triple point of air-free water is defined as 273.15 K. Why is it important that the water be free of air?
Compare the processes that occur when methanol (\({\bf{CH}}_3{\bf{OH}}\)), hydrogen chloride (\({\bf{HCl}}\)), and sodium hydroxide (\({\bf{NaOH}}\)) dissolve in water. Write equations and prepare sketches showing the form in which each of these compounds is present in its respective solution.
Indicate the most important type of intermolecular attraction responsible for solvation in each of the following solutions:
2. Methanol,\({\bf{CH}}3{\bf{OH}}\), dissolved in ethanol, \({\bf{C}}2{\bf{H}}5{\bf{OH}}\)
3. Methane,\({\bf{C}}{{\bf{H}}_{\bf{4}}}\), dissolved in benzene, \({{\bf{C}}_{\bf{6}}}{{\bf{H}}_{\bf{6}}}\)
4. The polar halocarbon \({\bf{C}}{{\bf{F}}_{\bf{2}}}{\bf{C}}{{\bf{l}}_{\bf{2}}}\)dissolved in the polar halocarbon \({\bf{CF}}2{\bf{ClCFCl2}}\)
5. \({{\bf{O}}_{\bf{2}}}\left( {\bf{l}} \right)\)in \({{\bf{N}}_{\bf{2}}}\left( {\bf{l}} \right){\bf{.}}\) \(\)
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