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In the neutralization of Na(2)S(2)O(3) u...

In the neutralization of `Na_(2)S_(2)O_(3)` using `K_(2)Cr_(2)O_(7)` by idometry, the equivalent weight of `K_(2)Cr_(2)O_(7)` is

A

`M//2`

B

`M//6`

C

`M//3`

D

`M`

Text Solution

Verified by Experts

The correct Answer is:
B
`6e^(-)+Cr_(7)O_(7)^(2-)rarr2Cr^(3+)(n=6)`
`2S_(2)O_(3)^(2-)rarrS_(4)O_(6)^(2-)+2e^(-)(n=2)`
`:.` Equivalent weight of `K_(2)Cr_(2)O_(7)=M//6`
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In the standardization of Na_(2)S_(2)O_(3) using K_(2)Cr_(2)O_(7) by iodometry, th equivalent weight of K_(2)Cr_(2)O is