How Do Chemists Determine Chloride Content in Drinking Water? 
Discover the fascinating chemistry of Mohr’s Argentometric Titration!
In this important analytical chemistry experiment, silver nitrate (AgNO₃) is used to determine the chloride ion (Cl⁻) concentration in a water sample.
What happens during the titration?
First, silver ions react with chloride ions to form a white precipitate of silver chloride (AgCl).
Potassium chromate (K₂CrO₄) acts as an indicator, giving the solution a yellow colour.
Once all chloride ions have reacted, excess silver ions react with chromate ions, producing a permanent brick-red precipitate of silver chromate (Ag₂CrO₄).
Key Concepts:- Argentometric titration.
- Precipitation reactions.
- Indicator chemistry.
- Quantitative water analysis.
- Determination of chloride in mg/L.
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