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Beginning with 150.0 mL of 0.175 M ammonia, determine the solution's pH after each of the following steps:

a) before any additional material is added to the solution,

b) after 25.0 mL of 0.200 M nitric acid, HNO3, is added,

c) after 25.0 mL of 0.400 M ammonium chloride is added to the solution resulting from step (b), and

d) after an additional 25.0 mL of 0.400 M ammonium chloride is added to the solution (be sure to account for the change in volume at each step).

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