Chapter 12: Problem 85
A cucumber placed in concentrated brine (salt wa- ter) shrivels into a pickle. Explain.
Chapter 12: Problem 85
A cucumber placed in concentrated brine (salt wa- ter) shrivels into a pickle. Explain.
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Get started for freeThe osmotic pressure of \(0.010 \mathrm{M}\) solutions of \(\mathrm{CaCl}_{2}\) and urea at \(25^{\circ} \mathrm{C}\) are 0.605 atm and 0.245 atm, respectively. Calculate the van't Hoff factor for the \(\mathrm{CaCl}_{2}\) solution.
Calculate the molarity and the molality of an \(\mathrm{NH}_{3}\) solution made up of \(30.0 \mathrm{~g}\) of \(\mathrm{NH}_{3}\) in \(70.0 \mathrm{~g}\) of water. The density of the solution is \(0.982 \mathrm{~g} / \mathrm{mL}\).
The molar mass of benzoic acid ( \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\) ) determined by measuring the freezing-point depression in benzene is twice what we would expect for the molecular formula, \(\mathrm{C}_{7} \mathrm{H}_{6} \mathrm{O}_{2}\). Explain this apparent anomaly.
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.
What is thermal pollution? Why is it harmful to aquatic life?
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