Chemistry 121

QUANTITATIVE ANALYSIS
Problem Set #3: Titrimetric Methods, Acid/Base Equilibria & Titrations

October 11, 1999

DUE: November 10, 1999

Problems in HARRIS



Chapter 7: #A, 5
Chapter 6: #I, 51, 53, 54
Chapter 10: #B, 2, 11, 19, 39
Chapter 11: #5, 29b
Chapter 12: #A, D, 8, 54


Additional Problems
  1. What is the pH of a solution prepared by mixing 0.0500 mol aspartic acid, 0.0300 mol LiOH, and 0.0300 mol H2SO4 in a total volume of 1.00 L?

  2. Calculate the change in pH resulting from a 50-fold dilution of a sample that has an analytical solute concentration of: a) 0.145 M Lactic Acid, b) 0.259 M Sodium Lactate, and c) 0.145 M Lactic Acid & 0.259 M Sodium Lactate.

  3. What will be the pH of the solution that results when 30.00 mL of 0.4000 M NaOH are mixed with 20.00 mL of H3PO4 having an analytical concentration of: a) 0.200 M, b) 0.600 M, c) 0.150 M, d) 0.400 M, e) 0.300 M, and f) 0.350 M.

  4. Calculate the pH after the addition of 0.00, 5.00, 10.00, 19.00, 20.00, 21.00, 30.00, 39.00, 40.00, 41.00, and 50.00 mL of 0.200M NaOH to 50.00 mL of 0.0800M H3PO4.
NOTE: This problem set is very long . . . You will want to work on this a couple problems at a sitting. If you find the additional problems (#3 & #4) to be very repetitive, you may want to do only every other calculation until you're sure that you have the hang of them.

Created and copyright by Joel M. Goldberg. Last updated: October 6, 1999


Back to Chem 121 HomePage jgoldber@zoo.uvm.edu