The number of molecules lost or gained by sodium thiosulphate is 1 How? please explain
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Answer:
Explanation:
The equivalent weight is the gram molecular weight divided by the number of electrons lost or gained by each molecule; For sodium thiosulfate (Na
2
S
2
O
3
⋅5H
2
O), this is (248.17/1) g.
In case of Sodium Thiosulfate the reaction proceeds as under:
I
2
+2Na
2
S
2
O
3
→Na
2
S
4
O
6
+2NaI
The conversion of 2Na
2
S
2
O
3
to I
2
2 electrons are transfered.
Hence for 1 Na
2
S
2
O
3
, 1 electron is transfered.
Thus Molecular weight divded by 1 is the equivalent weight & hence both have same value.
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