Analysis of a spring water
Determination of Cl- ions by colorimetric titration: Mohr’s method
Procedure
- Sample 10 mL of the water to be analyzed and transfer it to a 100 mL beaker.
- Add several drops of potassium chromate at 0.2 mol/L.
- Dilute 4 to 5 times.
- Stir.
- Dose with a silver nitrate solution at 0.01 mol/L.
- Stop dosing when the orange color of the silver chromate persists.
≈ 20 minutes / sample