Answer:
Unbalanced= Fe + H2SO4 Fe2(SO4)3 + H2
Balanced with same coefficients in the same order= 2Fe + 3H2SO4 ---> Fe2(SO4)3 + 3H2
Explanation:
Balancing a chemical equation means having the same number of atoms of an element on the reactant side as on the product side in accordance to the law of conservation of mass. To do this, coefficients (number behind the element) are used.
In this question,the below balanced equation was given
2CO2 + 3H20 ---> C2H6O + 3O2
Four other unbalanced equations were also given to be balanced and see which will have the same coefficients in the same order as the template equation. Let's start balancing each equation.
1. FeCl3 + NH4OH ---> Fe(OH)3 + NH4Cl (unbalanced)
Atoms of nitrogen, hydrogen, oxygen and Chlorine are unequal in both sides. Hence, we have
FeCl3 + 3NH4OH ---> Fe(OH)3 + 3NH4Cl (balanced)
2. CH4 + O2 ---> CO2 + H2O (unbalanced)
Atoms of hydrogen and oxygen are unequal in both sides. We have;
CH4 + 2O2 ---> CO2 + 2H2O (balanced)
3. Fe + H2SO4 ---> Fe2(SO4)3 + H2 (unbalanced)
Atoms of iron, sulphur, and oxygen are unequal in both sides. Hence,
2Fe + 3H2SO4 ---> Fe2(SO4)3 + 3H2 (balanced)
4. PCl5 + H2O ---> HCl + H3PO4 (unbalanced)
Atoms of chlorine, hydrogen, and oxygen are unequal in both sides. Hence,
PCl5 + 4H2O ---> 5HCl + H3PO4 (balanced).
From the above balanced equations, it can be observed that; 2Fe + 3H2SO4 ---> Fe2(SO4)3 + 3H2 has the same coefficients in the same order as 2CO2 + 3H20 ---> C2H6O + 3O2
That is, coefficient 2---- 3 ---- 1 ----- 3.
