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1. A 25.00 sample of 0.723M HClO4 is titrated with a 0.273M KOH solution. The H3O+ concentration after the addition of 10.0mL is___M.

2. Determine the pH of a 0.188M NH3 solution of at 25 degrees C. The Kb of NH3 is 1.76x10-5.

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