# The following chemical equation is not balanced: Fe_2O_3 + H_2SO_4 -> Fe_2(SO_4)_3 + H_2O. When this chemical equation is correctly balanced, what is the coefficient of the water molecule?

Aug 1, 2016

$F {e}_{2} {O}_{3} \left(s\right) + 3 {H}_{2} S {O}_{4} \left(a q\right) \rightarrow F {e}_{2} {\left(S {O}_{4}\right)}_{3} + 3 {H}_{2} O$

#### Explanation:

Water has a $3$ coeeficient. Is the equation stoichiometrically balanced? If not, then it should be.

The oxide ion is dibasic, and reacts with 2 equiv ${H}^{+}$ to give the water molecule:

${O}^{2 -} + 2 {H}^{+} \rightarrow {H}_{2} O$

How would write a balanced equation that represented the formation of nickel chloride from nickel oxide?

$\text{Nickel oxide + hydrochloric acid "rarr" Nickel chloride + water}$