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

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

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In iodometry, `KI` reacts with `K_(2)Cr_(2)O_(7)`in acidic medium to give `I_(2)` and this is a titrated against `Na_(2)S_(2)O_(3)`.
`K_(2)Cr_(2)O_(7) H_(2)SO_(4)+6KI to 4K_(2)SO_(4)+Cr_(2)(SO_(4))_(3)+7H_(2)O+3I_(2)`
`2 Na_(2)S_(2)O_(3)+I_(2) to 2NaI+Na_(2)S_(4)O_(6)`.
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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