Chapter 11: Q41 E (page 648)
A 13.0% solution of \({\bf{K_2CO_3}}\) by mass has a density of 1.09\({\bf{g/g}}{{\bf{m}}^{\bf{3}}}\). Calculate the molality of the solution.
The molality of \({\bf{K_2CO_3}}\) = 1.08 molal
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Explain the cleansing action of soap.
The Henry’s law constant for \({\bf{CO}}_2\)is \({\bf{3}}{\bf{.4 \times 1}}{{\bf{0}}^{{\bf{ - 2}}}}{\bf{ M AT}}{{\bf{M}}^{{\bf{ - 1}}}}\)at 25 °C. What pressure of carbon dioxide is needed to maintain a \({\bf{CO}}_2\)concentration of 0.10 M in a can of lemon-lime soda?
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 \({{\bf{N}}_{\bf{2}}}\left( {\bf{l}} \right){\bf{.}}\) \(\)
How do solutions differ from compounds? From other mixtures?
Which of the following gases is expected to be most soluble in water? Explain your reasoning.
(a) \({\bf{CH}}_4\)
(b) \({\bf{CCl}}_4\)
(c)\({\bf{CHCl}}_3\)
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