Chapter14ISM - CHAPTER 14 CHEMICAL EQUILIBRIUM Problem...

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Unformatted text preview: CHAPTER 14 CHEMICAL EQUILIBRIUM Problem Categories Biological : 14.98. Conceptua l: 14.13, 14.23, 14.39, 14.53, 14.54, 14.55, 14.56, 14.57, 14.58, 14.59, 14.60, 14.61, 14.62, 14.66, 14.67, 14.68, 14.69, 14.81, 14.91, 14.106, 14.107, 14.118. Descriptive : 14.85, 14.90, 14.93. Environmental : 14.65, 14.79. Industrial : 14.79, 14.95, 14.97, 14.101. Difficulty Level Easy : 14.14, 14.15, 14.16, 14.17, 14.18, 14.19, 14.20, 14.21, 14.22, 14.29, 14.30, 14.36, 14.53, 14.54, 14.55, 14.56, 14.58, 14.59, 14.60, 14.63, 14.67, 14.77, 14.92, 14.94, 14.98, 14.99, 14.103. Medium : 14.13, 14.23, 14.25, 14.26, 14.28, 14.31, 14.32, 14.35, 14.39, 14.40, 14.41, 14.42, 14.43, 14.44, 14.45, 14.48, 14.57, 14.61, 14.62, 14.64, 14.65, 14.66, 14.68, 14.69, 14.70, 14.74, 14.75, 14.78, 14.81, 14.82, 14.84, 14.85, 14.87, 14.90, 14.92, 14.93, 14.95, 14.97, 14.101, 14.107, 14.108, 14.112, 14.115. Difficult : 14.24, 14.27, 14.46, 14.47, 14.71, 14.72, 14.73, 14.76, 14.79, 14.80, 14.83, 14.86, 14.88, 14.89, 14.91, 14.96, 14.100, 14.102, 14.104, 14.105, 14.106, 14.109, 14.110, 14.111, 14.113, 14.114, 14.116, 14.117, 14.118. 14.13 c [B] [A] = K (1) With K c = 10, products are favored at equilibrium. Because the coefficients for both A and B are one, we expect the concentration of B to be 10 times that of A at equilibrium. Choice (a) is the best choice with 10 B molecules and 1 A molecule. (2) With K c = 0.10, reactants are favored at equilibrium. Because the coefficients for both A and B are one, we expect the concentration of A to be 10 times that of B at equilibrium. Choice (d) is the best choice with 10 A molecules and 1 B molecule. You can calculate K c in each case without knowing the volume of the container because the mole ratio between A and B is the same. Volume will cancel from the K c expression. Only moles of each component are needed to calculate K c . 14.14 Note that we are comparing similar reactions at equilibrium two reactants producing one product, all with coefficients of one in the balanced equation. (a) The reaction, A + C U AC has the largest equilibrium constant. Of the three diagrams, there is the most product present at equilibrium. (b) The reaction, A + D U AD has the smallest equilibrium constant. Of the three diagrams, there is the least amount of product present at equilibrium. 14.15 When the equation for a reversible reaction is written in the opposite direction, the equilibrium constant becomes the reciprocal of the original equilibrium constant. 34 1 1 4.17 10 = = = 33 ' 2 . 4 1 K K CHAPTER 14: CHEMICAL EQUILIBRIUM 387 14.16 The problem states that the system is at equilibrium, so we simply substitute the equilibrium concentrations into the equilibrium constant expression to calculate K c ....
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Chapter14ISM - CHAPTER 14 CHEMICAL EQUILIBRIUM Problem...

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