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In the standardisation of Na(2)S(2)O(3) ...

In the standardisation of `Na_(2)S_(2)O_(3)` using `K_(2)Cr_(2)O_(7)` by iodometry the equivalent mass of `K_(2)Cr_(2)O_(7)` is:

A

Molecular `mass//2`

B

Molecular `mass//6`

C

Molecular `mass//3`

D

Same as the molecular mass.

Text Solution

Verified by Experts

The correct Answer is:
B
The redox reaction is:
`(Cr_(2)O_(7))^(2-)+14H^(+)+6e^(-)rarr2Cr^(3+)+7H_(2)O`
Equivalent mass of `K_(2)Cr_(2)O_(7) = "(Molecular )/(6) mass"`
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