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Standard XII

Chemistry

Factors Affecting Adsorption

31.MnO2 on ig...

Question

31.MnO2 on ignition converts into Mn3O4. A sample of pyrolusite having 75%MnO2 ,20%inert impurities and rest water is ignited in air to a constant weight.what is the percentage of Mn in the ignited sample?

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Similar questions

M n O_{2}

on ignition converts into

M n_{3} O_{4}

. A sample of pyrolusite having

75 % M n O_{2}, 20 %

inert impurities and rest water is ignited in air to constant weight. What is the percentage of

M n

in the ignited sample?

Q. Igniting

M n O_{2}

in air converts it quantitatively to

{M n}_{3} O_{4}

. A sample of pyrolusite has

80 %

M n O_{2}

15 %

S i O_{2}

and the rest is water. The sample is heated in air to a constant mass. The

%

M n

in the ignited sample is (as the nearest integer)

Q. The calcium in a

0.8432

g sample is precipitated as

C a C_{2} O_{4}

. The precipitate is washed, ignited to

C a C O_{3}

and found to weigh

0.3462

g. Percentage of

C a O

in the sample is :

Q. The calcium in a

0.8432

g sample is precipitated as

C a C_{2} O_{4}

. The precipitate is washed, ignited to

C a C O_{3}

and found to weigh

0.3462

g. Percentage of

C a O

in the sample is (only integer part)

A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample .

Calculate the percentage of caco3 and mgco3 in the sample

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