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What is the oxidation number of manganese at end point?

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A sample of 10 cm3 of 0.10 mol dm-3 iron(II) sulphate is titrated against .025 mol dm-3 potassium manganate (VII) in the presense of excess of fluoride ions. It is found that 10 cm3 of the manganate(VII) solution is required to reach the end-point.

What is the oxidation number of the manganese at the end-point?
A) +2
B) +3
C) +4
D) +5

posted Mar 12, 2017 by anonymous

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