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How many gram of I(2) are present in a s...

How many gram of `I_(2)` are present in a solution which requires `40 mL` of `0.11N Na_(2)S_(2)O_(3)` to react with it, `S_(2)O_(3)^(2-)+I_(2)rarrS_(4)O_(6)^(2-)+2I`

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The correct Answer is:
0.56
`S_(2)O_(3)^(2-) + I_(2) rarr S_(4)O_(6)^(2-)`
meq of `I_(2)` = meq of `S_(2)O_(3)^(2-)`
`1000 xx W/254 xx 2 = 0.11 xx 40 xx 1` `rarr `W = 0.56g
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