CBSE Class 11-science Answered
A sol. of 0.1 M KMnO4 is used for the reaction
S2O3 2- +2MnO4 - +H2O =MnO2 +SO4 2- +OH-
What vol. of sol. in ml will be required to react with 0.158 gm of Na2S2O3 ?
Asked by | 26 Mar, 2013, 10:37: AM
Expert Answer
1 mole of S 2 O 3 2- needs 2moles of MnO 4 -
So, 0.1M KMnO 4 contains 0.1 moles in 1000 ml of solution
0.158 gm of Na 2 S 2 O 3 contains 0.001 moles equivalent
So
0.05 moles of Na 2 S 2 O 3 reacts in 1000 ml of solution
0.001 moles will react with 20 ml of KMnO 4 solution
Answered by | 10 Apr, 2013, 10:00: AM
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