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20. [2 points] The potential of the cell Mg Mg2+ (0.01 M) || Sn2+ (0.1 M) Sn at 298 K is (Given E° Mg2+/Mg = -2.34 V and Eº Sn2+/ [Show your work] A) 2.45 V B) 2.51 V C) 1.09 V D) 2.23 V E) 2.17 V 21. [2 points] The molar conductivity of Mg(N conductivity of Mg2+ is 1.060 x 10-2 S m2 mol- [Show your work] 2) 7.14 x 10-3 S m2 mol-1 ) 1.84 x 10-3 S m2 mol-1 3.68 x 10-3 S m2 mol-1 1428 y 10-2 2

2. [1 point] The fraction of the total current carried by an ion is called its A) ionic mobility B) limiting ionic conductivity C) transport number D) conductivity E) none of these answers. 3. [2 points] The limiting molar conductivities of KCI, KNO3, and AgNO3 are 14. mol-?, 14.50 mS m2 mol-1, and 13.34 ms m2 mol-1, respectively (all at 25°C). limiting molar conductivity of AgCl at this temperature? [Show your work] A) 138.3 mS m2 mol-1 B) 42.83 ms ma mol-1 C) 16.15 mS m2 mol-1 D) 13.83 ms m2 mol-1 E) None of these answers -1 -1

1. [1 point] Which of the following statements is false regarding galvani A) Reduction occurs at the cathode. B) Ions carry current inside the cell. C) When the cell potential is positive, cell reaction is spontaneous. D) Electrons flow around the external circuit, from cathode to anode. E) None of these answers. 2. [1 point] The fraction of the total current carried by an ion is called its A) ionic mobility B) transport number C) limiting ionic condu D) conductivity E) none of these answers. 3. [2 points] The limiting molar conductivities of KCI, KNO3, and AgNO3 a mol-1, 14.50 ms m? mol-, and 13.34 ms m2 mol-1, respectively (all at 25 limiting molar conductivity of AgCl at this temperature? [Show your work] A) 13.83 ms ma mol-1 B) 138.3 ms m2 mol-1 C) 42.83 ms m2 mol-1 D) 16.15 mS m2 mol-1 E) None of these answers