Potentiometry with the Belousov-Zhabotinsky Reaction
Description: The potentiometry of this oscillating reaction is determined using a Pt wire and Ag/AgCl electrode. The periods are about 1 min. in length, and the potential varies by about 200 mV. This changes in potential are monitored on a computer. The reaction lasts about 40 minutes.
Source: Harris, Daniel C. Quanitative Chemical Analysis 2nd Edition
Year: 1999 Vol: N/A Page: 382
Keywords: Potentiometry, BZ reaction, Oscillator, Voltage, Electrode, Kinetics
Rating: 
Hazard: Some
- Acute toxicity hazard – oral
- Electric shock hazard
- Skin corrosion hazard
- Inhalation hazard
- Oxidizing solids
- Specific target organ toxicity – single exposure – respiratory system
- Corrosive to metals
- Serious eye damage
Effectiveness: Average
- Somewhat connected conceptually to course material
- Mild effects are seen by audience
- Secondary effects are seen by audience
- Moderate failure rate
Difficulty: High
- Use of chemically sensitive systems
- Multi-step procedures with varying results
- Experiments in which data recording and display are necessary
- Use of scientific equipment
- Simple manipulations
Safety precautions:
- Eye protection required
- Gloves required
- Use of UL approved three-prong plug and outlet
- Absorbent materials on hand
- Sodium bicarbonate on hand
- Sodium thiosulfate on hand
- Perform in a well-ventilated area
- Avoid exposure to droplets, mists, or vapors
Class: Electrochemistry and Redox Reaction, Kinetics
Division: Analytical Chemistry, Physical Chemistry
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