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What is the equivalent mass of IO4^(-) ...

What is the equivalent mass of ` IO_4^(-)` when it is converted into `I_2` in acid medium ?

A

`M//6`

B

`M//7`

C

`M//5`

D

`M//4`

Text Solution

Verified by Experts

The correct Answer is:
B
Equivalent mass `= ("Molecular weight")/("Change in oxidation number per mole")`
Suppose molecular weight is M
Oxidation number of `I_2 ` in `IO_4^(-)` in
Acidic medium i.e., `l xx(-8)+1e^(-)=+7`
So eq. wt. = M / 7 .
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