16. A galvanic cell is made based on the following reaction:

With relevant half reactions:

If = 0.10 M, = 0.10 M, = 1.00 M, and Ecell = 3.02 V at 298 K, what is the pH of the cathode compartment? 

15. Radium-226 is a radioactive isotope that decays to form Radon-222 and an alpha particl(E) This process follows first-order kinetics, and the half-life of Radium-226 is 1600 years. Given a sample of 5.00 g of Radium-226, how many moles of Radon-222 would be present in the sample after two years? 

14. Ascorbic acid (H₂C₆H₆O₆) is a diprotic acid with and (A) What is the pH of a solution of 350.0 mg ascorbic acid in 500.0 mL water? Show your calculations. (5 pts) (B) Suppose 150.0 mL of 0.01000 M NaOH (aq) was added to the solution from (A). What would the pH of the resulting solution be? Show your calculations. 

16. A galvanic cell is made based on the following reaction: 2 Al(s) + Cr2O72 (aq) + 14 H+ (aq) → 2 Al3+ (aq) + 2 Cr3+ (aq) + 7 H2O (1) With relevant half reactions: Al3+ (aq) + 3e → Al (s) Eº = -1.66 V Cr2O72 (aq) + 14 H+ (aq) + 6e¯ → 2 Cr3+ (aq) +7 H2O (1) Eº = 1.33 V If [Cr³+] = 0.10 M, [Al3+] = 0.10 M, [Cr2O72] = 1.00 M, and Ecell = 3.02 V at 298 K, what is the pH of the cathode compartment? 

15. Radium-226 is a radioactive isotope that decays to form Radon-222 and an alpha particl(E) This process follows first-order kinetics, and the half-life of Radium-226 is 1600 years. Given a sample of 5.00 g of Radium-226, how many moles of Radon-222 would be present in the sample after two years? 

14. Ascorbic acid (H2C6H6O6) is a diprotic acid with Ka1 = 7.9 × 10-5 and Ka2 = 1.6 × 10-12 (A) What is the pH of a solution of 350.0 mg ascorbic acid in 500.0 mL water? Show your calculations. (5 pts) (B) Suppose 150.0 mL of 0.01000 M NaOH (aq) was added to the solution from (A). What would the pH of the resulting solution be? Show your calculations.