Question

Which of the following correctly represents a balanced chemical equation?
A. $\mathrm{Fe}(\mathrm{s})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(\mathrm{~s})+4 \mathrm{H}_{2}(\mathrm{~g})$
B. $3 \mathrm{Fe}(\mathrm{s})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(\mathrm{~s})+4 \mathrm{H}_{2}(\mathrm{~g})$
C. $3 \mathrm{Fe}(\mathrm{s})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(\mathrm{~s})+\mathrm{H}_{2}(\mathrm{~g})$
D. $3 \mathrm{Fe}(\mathrm{s})+4 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \rightarrow \mathrm{Fe}_{3} \mathrm{O}_{4}(\mathrm{~s})+\mathrm{H}_{2}(\mathrm{~g})$

Answer 1

B. 3Fe(s) + 4H2O(g) --> Fe3O4(s) + 4H2(g) is correctly balanced chemical equation.

• Iron and water react to form Iron (II,III) oxide and hydrogen gas. It is also known by the name ferrosoferric oxide.
• Ferrosoferric oxide is one of the iron oxide known by the name mineral magnetite.
• Iron (II,III) oxide has presence of iron in two oxidation states and thus is known as mixed oxide.