Question
When using FerroZine to determine the concentration of iron, how many moles of FerroZine are needed...
When using FerroZine to determine the concentration of iron, how many moles of FerroZine are needed to complex 3.6x10^(-7) mol of iron?
Answers
Ans. Balanced reaction: 3 Ferrozine + 1 Fe2+ ------------> Na4Fe(ferrozine)3
The product Na4Fe(ferrozine)3 is a colored complex whose intensity is spectrophotometrically recorded.
Stoichiometry: 3 mol ferrozine complexes with 1 mol Fe2+.
It’s assumed that all forms of Fe are converted into Fe2+ during sample preparation.
Now,
Moles of ferrozine required = 3 x Moles of Fe2+
= 3 x (3.6 x 10-7 mol)
= 1.08 x 10-6 mol
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