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Rzqust [24]
3 years ago
13

Complete the balancing of this equation ; which shows the reaction between iron and carbon :

Chemistry
1 answer:
rewona [7]3 years ago
5 0

The balanced equation is Fe_{2} O_{3}  + 3CO ---> 2Fe + 3CO_{2}

<u>Explanation</u>:

                        Fe_{2} O_{3}  + 3CO ---> 2Fe + 3CO_{2}

  • For solving this first of all you figure out the formula of iron(3)oxide so you look at the periodic table as you said valency of iron is 3 positive because metals are always positive and oxygen’s valency is 2 (negative because non-metal). You criss-cross both you take 2 from oxygen and put it under the iron and then 3 from iron under oxygen.
  • Valency is the number of electrons needed to be a noble gas.   Oxygen has 6 electrons in the outer shell and it needs 2 more to become noble gas.   The total number of electrons needed in every shell is 8 so to figure out valency you subtract the number of electrons in the outer shell from 8. Valency also shows how many electrons you need to share for bonding.
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