Chapter 12: Problem 4
Basing your answer on intermolecular force considerations, explain what "like dissolves like" means.
Chapter 12: Problem 4
Basing your answer on intermolecular force considerations, explain what "like dissolves like" means.
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Get started for freeExplain each of the following statements: (a) The boiling point of seawater is higher than that of pure water. (b) Carbon dioxide escapes from the solution when the cap is removed from a carbonated softdrink bottle. (c) Molal and molar concentrations of dilute aqueous solutions are approximately equal. (d) In discussing the colligative properties of a solution (other than osmotic pressure), it is preferable to express the concentration in units of molality rather than in molarity. (e) Methanol (b.p. \(65^{\circ} \mathrm{C}\) ) is useful as an antifreeze, but it should be removed from the car radiator during the summer season.
A beaker of water is initially saturated with dissolved air. Explain what happens when He gas at 1 atm is bubbled through the solution for a long time.
How many grams of urea \(\left[\left(\mathrm{NH}_{2}\right)_{2} \mathrm{CO}\right]\) must be added to \(450 \mathrm{~g}\) of water to give a solution with a vapor pressure \(2.50 \mathrm{mmHg}\) less than that of pure water at \(30^{\circ} \mathrm{C}\) ? (The vapor pressure of water at \(30^{\circ} \mathrm{C}\) is \(31.8 \mathrm{mmHg} .\) )
Acetic acid is a weak acid that ionizes in solution as follows: $$\mathrm{CH}_{3} \mathrm{COOH}(a q) \rightleftharpoons \mathrm{CH}_{3} \mathrm{COO}^{-}(a q)+\mathrm{H}^{+}(a q)$$ If the freezing point of a \(0.106 \mathrm{~m} \mathrm{CH}_{3} \mathrm{COOH}\) solution is \(-0.203^{\circ} \mathrm{C},\) calculate the percent of the acid that has undergone ionization.
As you know, some solution processes are endothermic and others are exothermic. Provide a molecular interpretation for the difference.
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