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Determine the following characteristics of the titration curve for 25.0 mL of 0.400 M NH3(aq) titrated with 0.335 M HI(aq). (For NH3, Kb = 1.8x10-5.) Enter scientific notation as 1.23E4. (a) The initial pH : (b) The volume of HI(aq) required to reach the equivalence point : (c) The pH at the half-neutralization point. (d)The pH at the equivalence point.

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