chapter 10 - approximately unity regardless of ionic...

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Slide 1 Chapter 10 Effects of Electrolytes on Chemical Equilibria
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Slide 2 Fig 10-1, p.268
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Slide 3 Effects of Ionic Charges on Equilibria
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Slide 4 Table 10-1, p.270
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Slide 5 Properties of Activity Coefficients Measure of effectiveness with which species affects equilibrium Independent of the nature of electrolytes. Depends only on ionic strength For a given ionic strength, activity coefficient departs farther from 1 as charge increases The activity coefficient of an uncharged molecule is
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Unformatted text preview: approximately unity regardless of ionic strength At a given ionic strength, activity coefficients for ions of same charge are approximately equal Slide 6 Determination of Activity Coefficient Debye-Huckel Equation x = activity coefficient of species X Z x = charge of the species X = ionic strength of the solution x = effective diameter of the hydrated ion X in nm (10-9 m) 0.51Z x 2 - log x = 1 + 3.3 x Slide 7 Table 10-2, p.274...
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chapter 10 - approximately unity regardless of ionic...

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