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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

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