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Redox Titration (Iron)
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Burette: potassium permanganate(VII)
Conical flask: iron(II) sulfate + sulfuric acid
Colour change of solution in conical flask:
Start | colourless due to iron(II) ions (very pale green)
Midway | pale yellow due to iron(III) ions formed on oxidation of iron(II) ions
Endpoint | orange due to mix of yellow [iron(III) ions] and pink [one drop of unreacted potassium manganate(VII)]
Conical flask: iron(II) sulfate + sulfuric acid
Colour change of solution in conical flask:
Start | colourless due to iron(II) ions (very pale green)
Midway | pale yellow due to iron(III) ions formed on oxidation of iron(II) ions
Endpoint | orange due to mix of yellow [iron(III) ions] and pink [one drop of unreacted potassium manganate(VII)]
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