Find the pH solution & Hydronium ion concentration.
1. What is the pH of a solution of 0.17 M acid and 0.81 M of its conjugate base if the pKa = 8.62?
 A.9.30
 B.7.94
 C.9.52
 D.9.68
 E.8.58
2.What is the hydronium ion concentration of a solution of 0.720 M acid and 0.240 M
 of its conjugate base if the ionization constant is 4.38 x 10-6?
 A.3.15 x 10-5
 B.1.31 x 10-5
 C.1.05 x 10-6
 D.1.46 x 10-6
 E.6.08 x 10-6