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Unformatted text preview: Final exam practice multiple choice answers McKeachie Chem 1C Spring 07 1. a. Since the value of the equilibrium constant is much larger than 1, the product pressures are mathematically required to be larger (the reaction favors the formation of products at equilibrium), therefore the reactant equilibrium pressures are smaller than the product equilibrium pressures. 2. d. ONLY A CHANGE IN TEMPERATURE WILL CHANGE THE VALUE OF THE EQUILIBRIUM CONSTANT!!!!! As Le Chtelier is my witness, if you even think about saying the value of the equilibrium constant changes with the concentration of the reactants or products on the final, I will hunt you down this summer and look disapprovingly in your general direction. 3. a. The rest are false all gas phase reactants so homogeneous equilibrium (b is false), if P is increased by reducing the volume, the reaction shifts to the left side of the reaction since it has fewer gas mols (c is false), Im ignoring d, and removing a product shifts the reaction to the products or to the right, making e false as well. 4. b. The easiest way to do this problem is by determining what K eq would be for the reaction in question. You can figure it our by combining the hydrolysis reactions of HOCl and F : HOCl + H 2 O H 3 O + + OCl K a = 10 8 F + H 3 O + HF + H 2 O K eq = 1/10 4 = 10 4 If I add reactions, I multiply equilibrium constants together (recall the proof for the...
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This note was uploaded on 04/25/2008 for the course CHEM 1C taught by Professor Staff during the Spring '01 term at UC Irvine.
- Spring '01