1. Galvanic Cells

2. Calculate the cell voltage for a voltaic cell created by connecting a copper electrode to a tin electrode. The copper electrode is immersed in a solution of copper(II) nitrate. The tin electrode is immersed in tin(II) nitrate. 1.-0.48 V 2.-0.14 V 3.0.14 V 4.0.34 V 5.0.48 V

3. Determine the voltage for the following reaction. All solutions are 1.0 M and the temperature is 25 o C. Mn 2+ + Pb  Mn + Pb 2+ 1.-1.31 V 2.-1.05 V 3.0.00 V 4.1.05 V 5.1.31 V

4. Calculate the standard free energy change, ∆G o, for the reaction below. Cu 2+ + Fe  Cu + Fe 2+ 1.-375 kJ 2.-151 kJ 3.117 kJ 4.287 kJ 5.516 kJ

5. A piece of copper metal is placed into solutions containing each of the following three cations. Which ion will be reduced by the copper metal? I. Sn 2+ II. Zn 2+ III. Ag + 1.I only 2.II only 3.III only 4.I and II 5.I, II, and III

6. Determine the voltage for the following reaction. The manganese solution is 1.0 M while the lead solution is 0.020 M. The temperature is 25 o C. Mn + Pb 2+  Mn 2+ + Pb 1.-1.10 V 2.-1.05 V 3.-1.00 V 4.1.00 V 5.1.10 V

7. In the following equation, ____ is being oxidized and ____ is being reduced. Cr 2 O 7 2- + Fe 2+ + H + + HSO 4 -  Cr 3+ + Fe 3+ + H 2 O + SO 4 2- 60 1.S, H 2.Cr, O 3.Fe, S 4.Fe, Cr 5.Fe, H 1234

8. Determine the oxidation state of sulfur in the compound Na 2 SO 3. 30 1.2- 2.0 3.2+ 4.4+ 5.6+ 1234

9. 4 NH 3 + 5 O 2  4 NO + 6 H 2 O In the above reaction, 3.10 g of NH 3 reacts with 2.50 g of O 2. What is the theoretical yield of NO? 120 1.1.88 g 2.5.46 g 3.8.20 g 4.24.0 g 5.120 g 1234

10. A solution is made by dissolving 250.0 g of K 2 CrO 4 in 1.00 kg of water. What will the freezing point of the new solution be? K f for water is 1.86 o C m -1. :120 1.- 8.87 o C 2.- 7.18 o C 3.- 5.73 o C 4.- 2.39 o C 5.- 1.86 o C 1234