In a model galvanic cell to test the corrosion of iron, the following conditions are chosen: [Fe 2+ (aq)], 0.025 M; [H + ], 1.0 mM; H 2 pressure, 0.04 atm; 48 o C. The two relevant standard reduction potentials for the iron and hydrogen couples are -0.44 and 0.00 V, respectively. What would the cell potential, in V, be under these conditions? (2 marks)

14. You want to galvanize an iron rod with zinc. and have calculated that you need to deposit 4.00 g of zinc to achieve an adequate coating. If your electrolysis cell (using Zn ²⁺ ) runs at 1.5 A, how long must you operate the cell to obtain the desired coating? (2 marks)

15.

Calcium carbonate has a K _sp of 4.8 x 10 ^-9. What is its molar solubility in aqueous 0.02 M sodium carbonate? (2 marks)