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Chapter 11: Problem 98
Would benzoic acid be more or less soluble in a \(0.1-M \mathrm{NaOH}\) solution than it is in water?
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An aqueous solution of 10.00 \(\mathrm{g}\) of catalase, an enzyme found in the liver, has a volume of 1.00 \(\mathrm{L}\) at \(27^{\circ} \mathrm{C}\) . The solution's osmotic pressure at \(27^{\circ} \mathrm{C}\) is found to be 0.745 torr. Calculate the molar mass of catalase.
The freezing point of \(t\) -butanol is \(25.50^{\circ} \mathrm{C}\) and \(K_{\mathrm{f}}\) is \(9.1^{\circ} \mathrm{C} \cdot \mathrm{kg} / \mathrm{mol}\) Usually \(t\) -butanol absorbs water on exposure to air. If the freezing point of a 10.0 -g sample of \(t\) -butanol is \(24.59^{\circ} \mathrm{C},\) how many grams of water are present in the sample?
The normal boiling point of diethyl ether is \(34.5^{\circ} \mathrm{C}\) . A solution containing a nonvolatile solute dissolved in diethyl ether has a vapor pressure of 698 torr at \(34.5^{\circ} \mathrm{C} .\) What is the mole fraction of diethyl ether in this solution?
How does \(\Delta H_{\mathrm{soln}}\) relate to deviations from Raoult’s law? Explain.
How would you prepare 1.0 \(\mathrm{L}\) of an aqueous solution of sodium chloride having an osmotic pressure of 15 atm at \(22^{\circ} \mathrm{C} ?\) Assume sodium chloride exists as \(\mathrm{Na}^{+}\) and \(\mathrm{Cl}^{-}\) ions in solution.
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