Question

Calculate the pH for 200. mL of a 0.750 M solution of the weak base, ethanolamine (HOCH2CH3NH2), Kb=3.20x10-5 ) being titrated with 0.750 M HCl at the following positions in the titration.

a) The initial pH (before any HCl has been added). a. 2.300 b. 3.542 c. 8.945 d. 11.690 e. 13.976

b) The pH of the solution after 75.0 mL of 0.750 M HCl has been added. a. 0.769 b. 9.727 c. 3.564 d. 8.654 e. 13.230

c)The pH of the solution at the equivalence point (i.e. after 200. mL of 0.750 M HCl has been added). a. 3.465 b. 9.034 c. 7.000 d. 8.346 e. 4.966

d)The pH of the solution after 300. mL of 0.750 M HCl has been added. a. 13.176 b. 0.125 c. 0.824 d. 3.654 e. 8.356

Answer 1