Sodium thiosulphate is the laboratory reagent used in the iodometric and iodometric titration. This also finds used in photography.
Based on the above passage, answer the following question.

If $I_{2}$ is the titre in a titration $A$ and $I_{2}$ is formed $i n s i t u$ in a titration $B$ , then these are respectively :

Iodometric, iodimetric

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Iodimetric, Iodometric

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Both iodimetric

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Both iodometric

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Solution

The correct option is D Iodimetric, Iodometric
Iodimetric Titrations: $2 N a_{2} S_{2} O_{3} + l_{2} \to N a_{2} S_{4} O_{6} + 2 N a l$

$N a_{2} S O_{3} + l_{2} + H_{2} O \to N a_{2} S O_{4} + 2 H l$

$N a_{3} A s O_{3} + H_{2} O \to N a_{3} A s O_{4} + 2 H l$

Iodometric Titrations: $2 C u S O_{4} + 4 K l \to C u_{2} l_{2} + 2 K_{2} S O_{4} + l_{2}$

$10 K l + 5 H_{2} S O_{4} + 5 O \to 5 K_{2} S O_{4} + 5 H_{2} O + 5 l_{2}$

The produced iodine is estimated with hypo solution
$2 N a_{2} S_{2} O_{3} + l_{2} \to N a_{2} S_{4} O_{6} + 2 N a l$

Suggest Corrections

Similar questions

I_{2} + 2 S_{2} O_{3}^{2 -} \to S_{4} O_{6}^{2 -} + 2 I^{-}

S_{2} O_{3}^{2 -}

M

I_{2}

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