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To 160.0 mL of a buffer solution containing 0.250 M ammonia and 0.100 M ammonium chloride,...

To 160.0 mL of a buffer solution containing 0.250 M ammonia and 0.100 M ammonium chloride, 20.00 mL of 1.00M HClO4 are added. a) Calculate the pH of the initial buffer solution. b) Calculate the pH of the new solution after the addition of acid. c) What becomes the pH if another 20.00 mL of the same acid solution is added? Pkb= 4.75

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