Featured in PASCO’s College Chemistry Instructor Guide

College Chemistry Instructor Guide

(PS-3803A)

College Instructor edition with 36 experiments covering introductory and general chemistry topics.

Oxidation Reduction

Lab Summary

Use an oxidation reduction potential electrode and drop counter to determine the concentration of a commercial, nominally 3% hydrogen peroxide solution, measuring the change in potential during an oxidation-reduction reaction.

Theory

Students use the change in potential during an oxidation-reduction reaction to determine the concentration of a commercial, nominally 3% hydrogen peroxide solution.

Method

Students gain experience conducting the following procedures:

  • Applying titration skills to oxidation-reduction reactions; using an oxidation reduction potential electrode.
  • Applying oxidation-reduction equations to obtain the stoichiometric ratio between the titrant and analyte.
  • Using the equivalence point volume of the titrant to calculate the concentration of the hydrogen peroxide solution.

Sensors / Equipment Used:

PASPORT Chemistry Sensor

(PS-2170)

Allows students to measure Temperature, pH/ISE/ORP, Absolute Pressure & Voltage in one sensor. For use with PASPORT Interfaces.

PASPORT High Accuracy Drop Counter

(PS-2117)

Is a professional drop counter that allows students to capture detailed titration data. For use with PASPORT Interfaces.

Oxidation Reduction Potential Probe

(CI-6716)

The ORP probe allows students to determine the ability of a species in a solution to act as an oxidizing agent or reducing agent.

Materials Used:

Magnetic stirrer and stir bar 
Buret, 50-mL 
Beaker, 150-mL - 2
Volumetric pipet, 10-mL 
Pipet bulb 
Graduated cylinder, 50-mL 
Clamp, right-angle 
Clamp, buret 
Ring stand 
Hydrogen peroxide, ~ 3%, 1:20 dilution - 40 mL
1.000 × 10–2 M Potassium permanganate (KMnO4) - 100 mL
4 M Sulfuric acid (H2SO4) - 70 mL
Water, deionized - 250 mL
Wash bottle with deionized water

The Associated Bundle:

Advanced Chemistry Standard Sensor Bundle

(PS-2928A)

Contains the probeware for completing experiments in the College Chemistry lab manual.

Interface Required

This experiment may require software and an interface for data collection.