Respuesta :
I hope I am right on this, but the answer is
Fe₂O₃ + 3CO --> 2Fe + 3CO₃
Fe₂O₃ + 3CO --> 2Fe + 3CO₃
Answer : The reaction that is an example of oxidation reduction reaction is "Fe2O3 + 3CO yields 2Fe + 3CO2 "
Explanation :
The oxidation reduction reaction is the one in which one of the elements undergo oxidation and the other undergoes reduction.
The oxidation number of the element that undergoes oxidation increases .
The oxidation number of the element that undergoes reduction decreases.
Let us find out which of these reactions show an increase and decrease in oxidation numbers.
[tex] Fe_{2}O_{3}+3 CO\rightarrow 2Fe + 3CO2 [/tex]
Let us find out the oxidation numbers of the elements involved in this reaction.
The standard oxidation state of O is -2
The overall charge on the compound Fe₂O₃ is 0.
Let us set up an equation to find oxidation number of Fe in Fe₂O₃.
2 ( oxidation number of Fe) + 3 ( Oxidation number of O) = Overall charge
2 ( oxidation number of Fe) + 3 ( -2) = 0
2 (oxidation number of Fe) - 6 = 0
oxidation number of Fe = 6/2 = +3
Oxidation number of Fe on reactant side is +3.
On product side Fe is present in its standard state. Therefore its oxidation number is 0.
Oxidation number of Fe on product side is 0.
Oxidation number of Fe changes from +3 to 0 which shows a decrease.
That means Fe undergoes reduction.
Let is find oxidation number of C on both the sides.
Oxidation number of C in CO is
oxidation number of C + (-2) = 0
oxidation number of C = +2
Oxidation number of C on reactant side is +2
Oxidation number of C in CO₂ is
Oxidation number of C + 2 x (-2) = 0
Oxidation number of C = +4
Oxidation number of C on product side is +4
Oxidation number for C changes from +2 to +4, which shows an increase.
Therefore C undergoes oxidation.
We can say that in the above reaction, one element ( Fe) undergoes reduction and the other (C) undergoes oxidation. This is an example of oxidation-reduction reaction.
Hence the correct option is "Fe2O3 + 3CO yields 2Fe + 3CO2 "
