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A 0.1g sample of pyrolusite ore containing MnO_(2)(MW = 87) was dissolved in a concentrated HCI solutiona and liberated CI_(2)(g) was passed through a concentrated KI solution releasing I_(2) if the liberated iodine required 16 ml of 1.25M sodium thiosulphate (Na_(2)S_(2)O_(3)) solution, mass percentage of MnO_(2) in the given sample is

Answer» <html><body><p>`43.5%`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/87-339709" style="font-weight:bold;" target="_blank" title="Click to know more about 87">87</a>%`<br/>`21.75%`<br/>`0.875%`</p>Solution :No. of m.eqts `MnO_(2) =` No. of m.eqts of `Cl_(2)` <br/> = No. of m.eqts of `<a href="https://interviewquestions.tuteehub.com/tag/ki-533104" style="font-weight:bold;" target="_blank" title="Click to know more about KI">KI</a> =` No. of m.eqts hypo No. of m.eqts <br/> `= MnO_(2) = <a href="https://interviewquestions.tuteehub.com/tag/16-276476" style="font-weight:bold;" target="_blank" title="Click to know more about 16">16</a> xx 1.25 = 16 xx (5)/(4) =20` <br/> No. of milli <a href="https://interviewquestions.tuteehub.com/tag/moles-1100459" style="font-weight:bold;" target="_blank" title="Click to know more about MOLES">MOLES</a> of `MnO_(2) = 10` <br/> <a href="https://interviewquestions.tuteehub.com/tag/weight-1451304" style="font-weight:bold;" target="_blank" title="Click to know more about WEIGHT">WEIGHT</a> of `MnO_(2) = 10 xx 87 xx 10^(-3) = 0.87g` <br/> weight % of `MnO_(2) = (0.87)/(1) xx 100 = 87%`</body></html>


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