Redox Titration of Tin(II) with Permanganate
Description: A Tin(II) solution is added to a beaker. The solution is stirred, and aqueous potassium permanganate is added. The color of the endpoint will be either brown or purple depending on the pH of the analyte.
5Sn(II)Cl2(aq) + 2 KMn(VII)O4(aq) + 16H+(aq) → 2Mn(II) + 5Sn(IV) + 8H2O(l) + 10 Cl–(aq) + 2K+(aq)
3SnCl2(aq) + 2KMnO4(aq) + 8H+ → 3 Sn(IV)(aq) + 2 MnO2(s) + 6Cl-(aq) + 2K+(aq) + 4H2O(l)
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Titration, Redox, Permanganate, Tin (II)
Rating: 
Hazard:
- Corrosive to metals
- Acute toxicity hazard- oral, inhalation, respiratory
- Specific target organ toxicity- single exposure – respiratory system
- Specific target organ toxicity – repeated exposure – oral, cardiovascular system
- Short-term (acute) aquatic toxicity hazard
- Long-term (chronic) aquatic toxicity hazard
- Skin sensitization
- Serious eye damage
Effectiveness: Average
- Good connection from demo to course material
- Results are observable without guidance
- Time to results is medium
- Mild effects are observed
- Systems contrast between states is noticeable
- Moderate failure rate
Difficulty: Some
- Use of scientific equipment
- Some fine manipulations
- Simple procedures
- Varying results depending on amount or order of addition
Safety Precautions:
- Eye protection required
- Gloves required
- Avoid exposure to dusts, mists, and vapors
- Use UL approved three-prong plug and outlet
- Prevent release of reagents to the environment
Class: Redox Reactions, Titrations
Division: Analytical