Question

25.0 ml of a 0.100 M trimethylamine (CH3)3N (a base like ammonia) Kb = 6.3×10−5, are transferred in an Erlenmeyer flask and titrated with 0.100 M of HCl. Predict pH, pOH, concentration of trimethylamine, concentration of the conjugated acid (CH3)3NH+, and concentration of HCl in the Erlenmeyer flask when: (a) 0 mL of HCl solution are added to the Erlenmeyer flask (a) 12.5 mL of HCl solution are added to the Erlenmeyer flask (c) 25 mL of HCl solution are added to the Erlenmeyer flask (d) 30 mL of HCl solution are added to the Erlenmeyer flask (e) Based on the information from points a-d, draw the expected titration curve (pH vs volume of HCl (ml))

Answer 1

A) pH at 0 ml of HCl

63/ 120 es's 서 meles 0.033 CHJ 0.5

9.8 5.5 2.0