1i got 96.8% purity...
0.25g sample of MnO2 is dissolved in HCl soln. and distillate passed through iodine soln. .The iodine thus liberated reqd 50mL 0.11N thiosulphate soln. Calculate purity of MnO2.
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9 Answers
1no of equi : 0.11 X 50 / 1000
weight of Mno2 = (56+32)/2 X no. of equi.
this weight
------------------ = purity
given wt.
1ohhhh sorry, u r right,
actually i have taken molecular wt. of Mn as 57 instead 56, method is same
& thats totally a foolish mistake
24So u all too are getting it in range of 90%......................mee the same toooo....but ans is 60%