Education.com
Try
Brainzy
Try
Plus

Experiment 8: Oxidation–Reduction Titration for AP Chemistry

By — McGraw-Hill Professional
Updated on Feb 8, 2011

For a quick review on stoichiometry, refer to the following concepts:

Synopsis

The concentration of either an oxidizing or a reducing agent may be determined by titrating a solution of an unknown concentration versus a solution of a known concentration or containing a known mass of solute.

Equipment

      analytical balance
      buret
      clamp
      desiccator
      drying oven
      Erlenmeyer flask
      pH meter
      pipet
      support stand
      wash bottle
      volumetric flask

Measurements

  1. the volume of a solution of an oxidant or reductant using a pipet
  2. the initial reading of the buret
  3. the final reading of the buret at the endpoint of the titration

Calculations

The volume of titrant added is calculated by the difference between measurements 2 and 3.

The volume of titrant is then converted to liters.

The pipeted volume is converted to moles by multiplying the liters of solution by its molarity. The moles of titrant are determined from the mole ratio in the balanced chemical equation for the reaction. The molarity of the solution is calculated by dividing the moles of titrant by the liters of titrant used.

Comments

Common oxidants are potassium permanganate and potassium dichromate.

    Iron(II) and oxalates are commonly chosen as reductants.

Refer to Figure 19.3 for general titration set-up.

Add your own comment

Ask a Question

Have questions about this article or topic? Ask
Ask
150 Characters allowed