Chapter 10: Problem 27
Explain the terms isotonic solution, crenation, and hemolysis.
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Chapter 10: Problem 27
Explain the terms isotonic solution, crenation, and hemolysis.
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Which ion in each of the following pairs would you expect to be more strongly hydrated? Why? a. \(\mathrm{Na}^{+}\) or \(\mathrm{Mg}^{2+}\) b. \(\mathrm{Mg}^{2+}\) or \(\mathrm{Be}^{2+}\) c. \(\mathrm{Fe}^{2+}\) or \(\mathrm{Fe}^{3+}\) d. \(F^{-}\) or \(B r^{-}\) e. \(\mathrm{Cl}^{-}\) or \(\mathrm{ClO}_{4}^{-}\) f. \( \mathrm{ClO}_{4}^{-}\) or \(\mathrm{SO}_{4}^{2-}\)
A solution is prepared by mixing 25 mL pentane \(\left(\mathrm{C}_{5} \mathrm{H}_{12}, d=\right.\) \(\left.0.63 \mathrm{g} / \mathrm{cm}^{3}\right)\) with \(45 \mathrm{mL}\) hexane \(\left(\mathrm{C}_{6} \mathrm{H}_{14}, d=0.66 \mathrm{g} / \mathrm{cm}^{3}\right)\) Assuming that the volumes add on mixing, calculate the mass percent, mole fraction, molality, and molarity of the pentane.
Calculate the normality of each of the following solutions. a. \(0.250 M\space \mathrm {HCl}\) b. \(0.105 M\space \mathrm{H}_{2} \mathrm{SO}_{4}\) c. \(5.3 \times 10^{-2} M \space \mathrm{H}_{3} \mathrm{PO}_{4}\) d. \(0.134 M\space \mathrm{NaOH}\) e. \(0.00521 M \space \mathrm{Ca}(\mathrm{OH})_{2}\) What is the equivalent mass for each of the acids or bases listed above?
The lattice energy \(^{*}\) of Nal is \(-686 \mathrm{kJ} / \mathrm{mol}\), and the enthalpy of hydration is \(-694 \mathrm{kJ} / \mathrm{mol} .\) Calculate the enthalpy of solution per mole of solid NaI. Describe the process to which this enthalpy change applies.
You have read that adding a solute to a solvent can both increase the boiling point and decrease the freezing point. A friend of yours explains it to you like this: "The solute and solvent can be like salt in water. The salt gets in the way of freezing in that it blocks the water molecules from joining together. The salt acts like a strong bond holding the water molecules together so that it is harder to boil." What do you say to your friend?
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