A 1.0g sample of pyrolusite ore containing MnO_2 (MW = 87)was dissolved in a concentrated HCI solution and liberated Cl_2(g) was passed through a concentrated KI solution releasing I_2 . If the liberated iodine required 16mL of 1.25 M sodium thiosulphate (Na_(2)S_(2)O_3)solution, mass percentage of MnO_2in the given sample is

A 1.0g sample of pyrolusite ore containing MnO_2 (MW = 87)was dissolve

1.	A 1.0g sample of pyrolusite ore containing MnO_2 (MW = 87)was dissolved in a concentrated HCI solution and liberated Cl_2(g) was passed through a concentrated KI solution releasing I_2 . If the liberated iodine required 16mL of 1.25 M sodium thiosulphate (Na_(2)S_(2)O_3)solution, mass percentage of MnO_2in the given sample is
Answer» <html><body><p>` 43.5% `<br/>`87%`<br/>` 21.75 %`<br/>`0.875%`</p>Solution :No.of eqts. `MnO_2` = No.of m.eqts .of `CI_2=` = No.of eqts .KI = No.of m.eqts. hypo No.of m.eqts of `MnO_(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)= 16x×1.25 = 16xx5/4=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)=<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a>` <br/>Weight of `MnO_(2)=10`Weight % of `MnO_(2) =10xx87xx10^(-3)=0.87g` <br/> Weight % of `MnO_(2)=(0.87)/1 xx100 =87%`</body></html>