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# Help on balancing equations question, please. Watch

Fe2O3 + CO -> Fe + CO2

(the fe2 and O3 are meant to be subscript)
2. i *am* so glad i never took chemistry a level.
3. (Original post by SAGNA)

Fe2O3 + CO -> Fe + CO

(the fe2 and O3 are meant to be subscript)
You have not copied it out correctly...

On the RHS it should be CO2 not CO
4. (Original post by charco)
You have not copied it out correctly...

On the RHS it should be CO2 not CO
Yeah, sorry thanks do you know how to do it?
5. The balanced equation is below:
Fe2O3 + 3CO -> 2Fe + 3CO2

Your equation is correct because CO should be at the left hand side as it is acting as a reducing agent.
6. (Original post by SAGNA)

Fe2O3 + CO -> Fe + CO2

(the fe2 and O3 are meant to be subscript)

So on the left there are 2 iron atoms, but only 1 on the right, so we need to fix that, making:

Now we need to balance the oxygens. We already have 3 on the left, and 2 on the right, so were going to have to change the amount on the right up to 3CO2. So now there are six oxygens on the right and only 4 on the left, to fix this we need to change the single carbon monoxide into 3 moles of it.

That has also balance the carbons for the equation, so it is now completely balanced.
7. (Original post by ThisIsOurDecision)

So on the left there are 2 iron atoms, but only 1 on the right, so we need to fix that, making:

Now we need to balance the oxygens. We already have 3 on the left, and 2 on the right, so were going to have to change the amount on the right up to 3CO2. So now there are six oxygens on the right and only 4 on the left, to fix this we need to change the single carbon monoxide into 3 moles of it.

That has also balance the carbons for the equation, so it is now completely balanced.
Thanks for the help!
8. (Original post by lubus)
i *am* so glad i never took chemistry a level.
That looks like GCSE to me..... extraction of iron from iron oxide in a blast furnace.

for some practice balancing equations, try out
http://education.jlab.org/elementbalancing/index.html
or
http://www.daveingram.ca/chemistry/equation1.html

That looks like GCSE to me..... extraction of iron from iron oxide in a blast furnace.

for some practice balancing equations, try out
http://education.jlab.org/elementbalancing/index.html
or
http://www.daveingram.ca/chemistry/equation1.html

Funny, i got an A* in IGCSE Chemistry ... goes to show some of the pitfalls of the modern education system
10. It usually gets taught about year 9 or year 10 in our school. Cue endless balancing equation worksheets. I dont know much about the IGCSE, i thought it was supposed to be harder than the rest?
11. (Original post by SAGNA)

Fe2O3 + CO -> Fe + CO2

(the fe2 and O3 are meant to be subscript)
I did it as...

2Fe2O3 + 6CO -> 4Fe + 6CO2

Always leave single elements until last.

If I can't figure it out I usually pick a number between 2-6 and place it in front of a compound then work from there. It usually gives me some inspiration.
12. (Original post by Genocidal)
I did it as...

2Fe2O3 + 6CO -> 4Fe + 6CO2

Always leave single elements until last.

If I can't figure it out I usually pick a number between 2-6 and place it in front of a compound then work from there. It usually gives me some inspiration.
Divide through by 2 ...
13. (Original post by charco)
Divide through by 2 ...
Yes I could but exam answers accept different multiples. At least my exam board does so meh.
14. Bad practice though moving into A-level. Also makes calculations with moles unnecessarily complicated!

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