303Solutions

303Solutions - Solutions Solvent: present in the largest...

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Lesson 12 1 Lesson 12 Solutions Solvent : present in the largest amount Solute : present in smaller amount than the solvent Solutions are homogeneous, i.e. have uniform properties Ideal solutions are the ones where solvent and solute do not to interact with each other – similar to ideal gases Lesson 12 Ideal solutions Benzene Toluene Lesson 12 Non-ideal solutions Chloroform Acetone
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Lesson 12 2 Lesson 12 Lesson 12 Composition of solutions Mole fraction Molality Molarity ( depends on T ) n j j i n i i n n n n n n x 1 2 1 ... 1 1 n j j x solvent of kg solute of moles molality solution of liters solute of moles molarity Percentage – 25% (v/v): 25 ml solute per 100 ml solution – 25% (w/v): 25 g solute per 100 ml solution – 25% (w/w): 25 g solute per 100 g solution Lesson 12 Example 1 What are the molality and molarity of a solution of ethanol (C 2 H 5 OH) in water if the molar fraction of ethanol is 0.05? Assume that the density of the solution is 0.997 g/ml.
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303Solutions - Solutions Solvent: present in the largest...

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