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A solution of 0.1M KMnO4 is used for th...

A solution of 0.1M `KMnO_4` is used for the reaction `S_(2)O_(3)^(-2) + 2 MnO_(4)^(-) + H_(2)O rarr MnO_(2) +SO_(4)^(2-)+ OH^(-)` . The volume of `KMnO_4` required to react 0.158gm of Na,s,o, is (MW = 158)

A

13.33 ml

B

6.66 ml

C

3.33 ml

D

26.67 ml

Text Solution

Verified by Experts

The correct Answer is:
D
No. of milli equivalents of `KMnO_4` = No of milli equivalents of thiosulphate ions
`V xx0.1 xx3=(0.158)/(((158)/8))xx1000`
`V = 80/3 =26.67 ml`
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