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Question

How many moles of 'iodine' are liberated when 2 moles of KMnO4 react with KI in acidic medium?

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Solution

In acidic medium
2MnO4+16H++10I2Mn2++8H2O+SI2
According to above reaction 2 moles of KMnO4 gives 5 mole I2.

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