Which of the following is required to estimate $N a H S O_{3}$ volumetrically?

I_{2}

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N a_{2} S_{2} O_{3} (h y p o)

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N a_{2} S O_{4}

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H I

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Solution

The correct options are
A $I_{2}$
B $N a_{2} S_{2} O_{3} (h y p o)$
$N a H S O_{3} is treated with excess (known) amount of I_{2} and unreacted I_{2}$ $is determined by back titration using$

$N a_{2} S_{2} O_{3} (hypo) iodometrically. I_{2} + N a H S O_{3} + H_{2} O \to N a H S O_{4} + 2 H I I_{2} + 2 N a_{2} S_{2} O_{3} \to N a_{2} S_{4} O_{6} + 2 N a I$

Suggest Corrections

Similar questions

N a I O_{3} + N a H S O_{3} \to N a_{2} S O_{4} + N a H S O_{4} + I_{2} + H_{2} O

N a_{2} C O_{3} S O_{2} - - \to (A) N a_{2} C O_{3} - ---- \to (B) S \to (C) A g N O_{3} - --- \to (D)

2 N a I O_{3} + 5 N a H S O_{3} \to 2 N a H S O_{4} + 2 N a_{2} S O_{4} + H_{2} O + I_{2}

N a H S O_{3}

381

I_{2}

N a_{2} S_{2} O_{3}

C u^{2 +}

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