e3ps10 - (Hint: ln 2 = 0.6931. ~= 0.7) 1. Balance the...

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(Hint: ln 2 = 0.6931. .. ~= 0.7) 1. Balance the following half reaction in an acid. How many hydrogen ions are needed? Cr(OH) 3 CrO 4 2- a. 5 b. 4 c. 3 d. 2 e. 1 2. The reaction below occurs in a(an) _________ cell and the sign of the anode is ______. Cu (s) + 2Ag + CU 2+ + 2Ag (s) a. Electrochemical, Positive b. Voltaic, Positive c. Electrochemical, Negative d. Galvanic, Negative 3. Which statements are true in regards to a table of standard half cell reduction potentials? I. The reactants of the reaction are oxidizing agents II. The more positive the potential the better the reducing agent III. The reactions shown are reductions IV. The oxidizing number of the products is smaller than the reactants a. I, III, IV b. I, II, III, IV c. II, III d. II, IV 4. If a dead battery has a ratio of 2 for [Fe 2+ ]/[Cd 2+ ], what is the standard cell potential? (Hint: log(2) = 0.301) a. 0.36 V b. 0.33 V c. -0.33 V d. -0.36 V 5. Rank the following from weakest to strongest oxidizing agent: Li + , K + , Mg +2 , Zn +2 Li + + e - Li -3.1 V K + + e - K -2.9 V Mg +2 + 2e - Mg -2.4 V Zn +2 + 2e - Zn -0.76 V a. Li + < K + < Mg 2+ < Zn 2+ b. Li + < Mg +2 < K + < Zn 2+ c. Zn +2 < Mg +2 < K + < Li + d. Zn +2 < Mg +2 < K + < Li + 6. How many moles of Al 3+ were needed to produce 4 moles of Al when 0.5 faraday of charge passes through a cell? a. 0.2 mol Al 3+ a. 4 mol mol Al 3+ b. 1 mol 3+ c. 0.1 moles Al 3+
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7. What current is needed to produce 98.5 g of solid gold from Au+ in 2 hours? a. 6.7 A b. 24.1 kA c. 804.0 A d. 7.0 kA 8. The following reaction is at equilibrium. If [Ag + ] = 1x10 -6 M, what is [Cu 2+ ]? Cu 2+ + 2Ag(s) Cu (s) + 2Ag + a. 5x10 -9 M b. 5x10 -15 M c. 2x10 8 M d. 5x10-7 M 9. Which of the following is not true about nickel-metal hydride batteries? a.
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e3ps10 - (Hint: ln 2 = 0.6931. ~= 0.7) 1. Balance the...

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