Redox Titration of Peroxide With Permanganate
A purple liquid flows from a buret tip into a colorless liquid in a beaker with a pink and purple mixture in the liquid.
Description: An acidified Hydrogen Peroxide solution is titrated with a 0.1M Potassium Permanganate solution. The end point occurs when the mixture turns purple.
2KMnO4(aq) + 5H2O2(aq) + 6H+(aq) → 2Mn+2(aq)+ 8H2O(l) + 5O2(g) + 2K+(aq)
Mn(VII) + 5e– → Mn(II)
O(I) → O(II) + e–
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Titration, Permanganate, Reduction, Oxidation, Peroxide
Rating: 
Hazard: Medium
- Acute toxicity- oral
- Oxidizing solid
- Skin corrosion hazard
- Skin irritation
- Corrosive to metals
- Serious eye damage
- Short-term (acute) aquatic hazard
- Long-term (chronic) aquatic hazard
- Specific target organ toxicity- repeated exposure – brain, inhalation
- Specific target organ toxicity- single exposure – respiratory system
- Electric shock hazard
- Carcinogenicity hazard
- Use of toxic reagents
- Use of environmental toxins
- Production of oxidizers
Effectiveness: Average
- Results are observable without guidance
- Somewhat connected to course material
- Time to results is medium
- Good reliability
- Contrast of behavior between systems is clear
Difficulty: Medium
- Use of scientific equipment
- Some intermediate steps to results
- Use or reactive reagents
- Use of toxic reagents
- Some careful manipulation required
Safety Precautions:
- Eye protection required
- Gloves required
- Lab coat recommended
- Use of UL-approved three-prong plug and outlet
- Perform in a well-ventilated area
- Avoid release of reagents to the environment
Class: Titrations, Redox Reactions
Division: Analytical
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