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Question

The mass percentage of Fe+3 ion present in Fe0.93 O1.00 is?  1)15%. 2) 5.5%. 3) 10%. 4) 11.5%


Solution

Dear Student ,
let out  of 0.93, Fe3+=x and Fe2+=.93-x
then using charge balance..
3*x+2*(0.93-x)=2*1
( 1 for oxygen)
x=.14
% of Fe3+=(.14/.93)*100=15%

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