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Ask iit jee aieee pet cbse icse state board experts Expert Question: Stoiciometry Question
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[Post New]11 Nov 2007 18:19:28 IST
    Subject: Stoiciometry Question
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Anupamagrawal13a (245)

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Sir I am very weak in stoiciometry,now i have started to study it.plz solve this question sir
Ques-A mixture of FeO & Fe3O4 when heated in air to a const. weight gains 5% in its weight.Find the percentage composition of the initial mixture.
 
    
[Post New]11 Nov 2007 19:24:31 IST
    Subject: Stoiciometry Question
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krishna.gopal (2037)

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Let out of 100 g x g is FeO and remaining Fe3O4
On heating FeO will oxidise to Fe3O4
3FeO+ (1/2)O2 gives Fe3O4
So 3*72=216 g FeO will give 232 g Fe3O4
So 232x/216+(100-x)=105
So x = 216*5/16 percent
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi
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