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@taraya
@taraya asked in Science & MathematicsChemistry · 6 months ago

In Winkler test we used alkaline KI(Potassium Iodide)solution what is the reason for this ?

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  • hcbiochem
    Lv 7
    6 months ago

    The Winkler test uses a series of reactions to quantitate oxygen in a sample. You can find the specific reactions here: https://ocw.mit.edu/courses/earth-atmospheric-and-...

    But briefly, O2 reacts with Mn2+ oxidizing it to Mn3+.

    I- reduces Mn3+ back to Mn2+ and forms I2

    I2 is then measured

    So, KI reduces Mn3+ to Mn2+

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