The equivalent mass of sodium thiosulphate Na2S2O3- 5H2O in the reaction- 2Na2S2O3 - I2- 2NaI - Na2S4O6 is

The correct option is A 248 #10; #10;The equivalent weight is the gram molecular weight divided #10;by the number of electrons lost or gained by ea ...

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Standard XII

Chemistry

Stoichiometric Calculations

The equivalen...

Question

The equivalent mass of sodium thiosulphate $(N a_{2} S_{2} O_{3} \cdot 5 H_{2} O)$ in the reaction,
$2 N a_{2} S_{2} O_{3} + I_{2} \to 2 N a I + N a_{2} S_{4} O_{6}$ is

248

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124

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596

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62

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Solution

The correct option is A $248$

The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule; For sodium thiosulfate ( $N a_{2} S_{2} O_{3} \cdot 5 H_{2} O$ ), this is (248.17/1) g.

In case of Sodium Thiosulfate the reaction proceeds as under:

$I_{2} + 2 N a_{2} S_{2} O_{3} \to N a_{2} S_{4} O_{6} + 2 N a I$

The conversion of $2 N a_{2} S_{2} O_{3}$ to $I_{2}$ 2 electrons are transfered.

Hence for 1 $N a_{2} S_{2} O_{3}$ , 1 electron is transfered.

Thus Molecular weight divded by 1 is the equivalent weight & hence both have same value.
Hence option A is correct.

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Similar questions

Q. In the reaction,

I_{2} + 2 N a_{2} S_{2} O_{3} \to 2 N a I + N a_{2} S_{4} O_{6}

, the equivalent weight of sodium thiosulphate is:

Q. The equivalent weight of

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acts as.

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The equivalent mass of sodium thiosulphate (Na2S2O3⋅5H2O) in the reaction,2Na2S2O3+I2→2NaI+Na2S4O6 is

The equivalent mass of sodium thiosulphate $(N a_{2} S_{2} O_{3} \cdot 5 H_{2} O)$ in the reaction,
$2 N a_{2} S_{2} O_{3} + I_{2} \to 2 N a I + N a_{2} S_{4} O_{6}$ is