Saturday

September 20, 2014

September 20, 2014

Posted by **mZ. YoU** on Tuesday, February 20, 2007 at 5:38pm.

Fe2O3 + CO yeilds Fe + CO2

Fe2O3 + CO ==> Fe + CO2

Rule: balance by changing coefficients. You may not change subscripts.

Look at the Fe atoms. There are 2 Fe atoms on the left and only 1 on the right; therefore, we place a 2 in front of the Fe on the right. Like so.

Fe2O3 + CO ==> 2Fe + CO2

Count O on the left. I see 4. That means I need a 2 in front of the CO2 on the right. Like so.

Fe2O3 + CO ==> 2Fe + 2CO2

But we see that by changing CO2 on the right, we automatically mess up the C on the left. So we place a 2 in front of the CO on the left and TRY IT. It may not work.

Fe2O3 + 2CO ==> 2Fe + 2CO2

Now we check. Fe balances with 2 on the left and right. C balances with 2 on the left and right. O does not balance because there are 5 on the left and 4 on the right. Alas! What to do? Since there is an odd number of O atoms on the left, sometimes it helps to try the next higher number; i.e., instead of 2 on the CO2, let's try 3 for CO2 (and of course that makes us use 3CO on the left. Like so.

Fe2O3 + 3CO ==> 3Fe + 3CO2

Now let's check it. 2 Fe on left and right. 6 O on the left (3 from Fe2O3 and 3 from 3CO) and 6 on the right (3x2=6). And we have 3C on the left and 3C on the right. Everything balances. Yea!

But you have 3 fe on the right and only two on the left because the 2 behind the Fe is a subscript for Fe so the equation is:

Fe subscript 2 O subscript 3 yeilds Fe plus CO subscript 2

Thank you for calling that to my attention. I just made a typo. Notice in the step BEFORE I had a 2 in front of the Fe on the right side. I meant to keep the old numbers but change the CO and CO2. When I typed the next step I typed a 3 instead of a 2 Fe on the right. The complete balanced equation should look this way.

Fe2O3 + 3CO ==> 2Fe + 3CO2

Looks ok to me now.

Thank you

**Answer this Question**

**Related Questions**

Chemistry - I'm having a hard time figuring these out. Please help me on them! ...

chemistry - in a blast furnace, Iron(III) oxide is used to produce iron by the ...

chemistry - Can some one please balance this equation for me Fe + O2---> ...

Science - How do you balance this equation? Fe2O3+C=Fe+CO2

Chemistry - How do you balance Fe2O3+C. 2Fe+CO2

Chemistry - Can someone help me balance this i tried and didn't succeeded. Fe2O3...

chemistry - Balance the following equastions: Fe2O3 +c --> Fe +CO2 SO2 + O2...

chemistry - se the information provided to determine ΔH°rxn for the following ...

science - How many grams of CO are needed to react with an excess of Fe2O3 to ...

chemistry - Please let me know if my equation is correct,taken from the ...