Electrochemistry and Redox Reactions- Potentiometric Titration of Fe2+ and MNO4-

Potentiometric Titration of Fe²⁺ with MNO₄^–

Description: A permanganate solution is titrated with ferrous ion, and the change in voltage is determined using Ag/AgCl//Pt electrodes. A faint pink color is seen at the equivalence point. A computer can be used to plot voltage charge.

Source: Harris, Daniel C. Quantitative Chemical Analysis, 2nd Ed.

Year: 1999   Vol: N/A   Page: 422

Keywords: Permanganate, Titration, Ferrous ion, Potential, Saturated calomel electrode, Platinum

Rating:

Hazard: Medium

• Acute toxicity hazard
• Oxidizing solids
• Skin corrosion hazard
• Aquatic toxicity hazard
• Electric shock hazard
• Serious eye damage

Effectiveness: Average

• Good connection from demo to course material
• Results are observable with guidance
• Moderate failure rate
• Secondary effects are seen by audience
• Mild effects are seen by audience

Difficulty: High

• Multi-step procedures
• Experiment in which data recording and/or display are necessary
• Demonstrations require prior training
• Volume-dependent addition for proper results

Safety Precautions:

• Eye protection required
• Gloves required
• Use of UL approved three-prong outlet
• Absorbent material on hand
• Prevent release of reagents to the environment
• Avoid exposure to mists, droplets, and vapors

Class:  Redox Reactions, Titrations

Division: Analytical Chemistry

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