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Chapter 11: Q11.1-9E (page 646)
Explain why the ions \(N{a^ + }\) and \(C{l^ - }\) are strongly solvated in water but not in hexane, a solvent composed of nonpolar molecules.
Solvated means stabilizing both\(N{a^ + }\)and\(C{l^ - }\)
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How do colloids differ from solutions with regard to dispersed particle size and homogeneity?
Calculate the boiling point elevation of 0.100 kg of water containing 0.010 mol of NaCl, 0.020 mol of \({\bf{N}}{{\bf{a}}_2}{\bf{S}}{{\bf{O}}_4}\), and 0.030 mol of \({\bf{MgC}}{{\bf{l}}_2}\), assuming complete dissociation of these electrolytes.
The concentration of glucose, \({{\bf{C}}_{\bf{6}}}{{\bf{H}}_{{\bf{12}}}}{{\bf{O}}_{\bf{6}}}\) in normal spinal fluid is\(\frac{{{\bf{75mg}}}}{{{\bf{100g}}}}\). What is the molality of the solution?
Convert a volume of 9.345 qt to liters.
Question: The vapor pressure of methanol, \({\bf{C}}{{\bf{H}}_{\bf{3}}}{\bf{OH}}\) , is 94 tor at 20 掳C. The vapor pressure of ethanol,\({{\bf{C}}_{\bf{2}}}{{\bf{H}}_{\bf{5}}}{\bf{OH}}\) , is 44 tor at the same temperature.
(a) Calculate the mole fraction of methanol and of ethanol in a solution of 50.0 g of methanol and 50.0 g of ethanol.
(b) Ethanol and methanol form a solution that behaves like an ideal solution. Calculate the vapor pressure of methanol and of ethanol above the solution at 20 掳C.
(c) Calculate the mole fraction of methanol and of ethanol in the vapor above the solution.
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