(a) A 25.0 mL sample of 0.175 M methylamine CH3NH2 (Kb = 1.3 x 10-5) is titrated with 0.150 M HBr. Find the initial pH at the ½ equivalence point after 5.0 mL of acid is added the pH at the equivalence point the pH after 5.0 mL acid is added after the equivalence point

Chemistry: Principles and Reactions
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Author:William L. Masterton, Cecile N. Hurley
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Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 45QAP: A sample of 0.220 M triethylamine, (CH3CH2)3 N, is titrated with 0.544 M HCl. (K b...
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  1. (a) A 25.0 mL sample of 0.175 M methylamine CH3NH2 (Kb = 1.3 x 10-5) is titrated with

0.150 M HBr.

  • Find the initial pH
  • at the ½ equivalence point
  • after 5.0 mL of acid is added
  • the pH at the equivalence point
  • the pH after 5.0 mL acid is added after the equivalence point
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