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a la z 5.5X10 2. (5 points) Calculate the pH of a buffer that is 0.678 M in ammonia and 0.546 M in ammonium chloride after 50

3. (4 points.) A 20 ml sample of 0.10 M NH3 is titrated with 0.15 HCI. The K is 1.8 x 105. What is the pH of the base initial
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0.678 M 0.596 M NH₂ WHyll kb (NH3) = 1.8810-5 + ЭН, 0.678 - H some 1M NHyu 0.546 0.678-0.05 0.546 +0.05 2 - pkt log [NHy t] 2CLASSTU Date [OH-] = 0.14 = 1.8x105) 10.1) 1.34 x 10-3 Poha a log Lot] 2.87 pH = 14- poh 11.128

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