Question

1.6 g of pyrolusite ore was treated with 50 cm3 of 1.0 N oxalic acid and some sulphuric acid. The oxalic acid left undecomposed was raised to 250 cm3 in a flask. 25 cm3 of this solution when titrated with 0.1 N KMnO4​ required 32 cm3 of the solution. Find the percentage of pure MnO2​ in the sample and also the percentage of available oxygen.



plz with proper explanation
if possible solve it on a page
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Answer 1

Answer:

Explanation:

Equivalent of 25ml = 3.2

Equivalent of 250 ml = 32

Equivalent of oxalic acid = 50

Equivalent of mno2 = 18

Moles×2000=18

Moles=0.009

Weight = 0.783

Percentage purity = 48.9375