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Quiz 2-solutions

# Quiz 2-solutions - Version 177 Quiz 2 laude(51635 This...

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Version 177 – Quiz 2 – laude – (51635) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. Constants R = 8 . 314 J · K 1 · mol 1 Defnitions Q [C] c [D] d [A] a [B] b Equations Δ G = Δ H - T Δ S Δ G = - RT ln K ln K 2 K 1 = Δ H R p 1 T 1 - 1 T 2 P Q = K [at equil.] K w = [H + ][OH ] 001 5.0 points Using the law oF mass action, write the equilibrium expression For the Following reac- tion: 2 Cu 2+ (aq) + 4 I (aq) ←→ 2 CuI(s) + I 2 (aq) 1. K = [I 2 ] [Cu 2+ ] 2 [I ] 4 correct 2. K = [Cu 2+ ] 2 [I ] 4 [I 2 ] 3. K = [I 2 ][CuI] 2 [Cu 2+ ] 2 [I ] 4 4. K = [Cu 2+ ] 2 [I ] 4 [I 2 ][CuI] 2 Explanation: The equilibrium expression, K , is the ratio oF products to reactants raised to their respec- tive stoichiometric coe±cients. Solid species are not included in the expression. 002 5.0 points Which oF the Following statements is/are always true concerning K w ? I) It gets larger as the temperature in- creases II) It equals 10 14 III) K w = [H + ][OH ] 1. I only 2. II, III 3. II only 4.

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Quiz 2-solutions - Version 177 Quiz 2 laude(51635 This...

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