Question

Write the chemical equations for Winklers titration.​

Answer 1

Explanation:

Winkler Titrations – Measuring Dissolved Oxygen

2 Mn2+ (aq) + O2 (aq) + 4OH– → 2 MnO(OH)2(s) (1)

MnO(OH)2(s) + 2 I–(aq) + 4H+ → Mn2+(aq) + I2(aq) + 3H2O (2)

I– (aq) + I2 (aq) → I3– (aq) (3)

2 S2O32-(aq) + I3– (aq) → S4O62-(aq) + 3 I– (aq) (4)