g of an impure sample of on reaction with excess liberated which was passed into solution. The liberated required mL of . The percentage purity of is ():

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Question

$0.5$ g of an impure sample of $MnO_2$ on reaction with excess $HCl$ liberated $Cl_2$ which was passed into $KI$ solution. The $I_2$ liberated required $40$ mL of $0.1 N$ $Na_2S_2O_3$. The percentage purity of $MnO_2$ is ($Mw = 87$):

Prashant Kotian · Accepted Answer

Correct answer: A. Meq = Meq .
Mass of g.
.

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