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The number of equivalents of N(2)S(2)O(3...

The number of equivalents of `N_(2)S_(2)O_(3)` required for the volumetric estimation of one equivalent of `Cu^(2+)` is

A

1

B

2

C

`3//2`

D

3

Text Solution

Verified by Experts

The correct Answer is:
B
`Cu^(2+)+2I^(-) rarr CuI_(2)" "2 CuI_(2) rarr Cu_(2)I_(2)+I_(2)`
`I_(2)+2NA_(2)S_(2)O_(3) rarr 2NaI+Na_(2)S_(4)O_(6)`
`Cu^(2+) equiv 2 Na_(2)S_(2)O_(3)`
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