1. K for vitamin C (also known as ascorbic acid, C.H.0.) is 8.0 x 10". If 13.5 g of vitamin C is dissolved in 795mL of water, what is the pH of the solution at equilibrium? 2. Pyridine, C.H.N, is an important chemical in the manufacture of medications and vitamins, K, for pyridine is 1.9 x 10". Determine the pH of a solution that is prepared by dissolving 1.0 g of pyridine in a 1.3 L of solution? 3. A weak base with a concentration of 1.3 mol/L has a percent ionization of 0.72. Calculate the pH and the Ky of this weak base