To determine which option shows a correctly balanced chemical equation, we need to check each equation for balance. A balanced equation has the same number of each type of atom on both sides of the equation.
-
H₂O ⟶ H₂ + O₂
Left side: 2 H, 1 O
Right side: 2 H, 2 O
This equation is not balanced. -
2Fe₂O₃ + C ⟶ Fe + 3CO₂
Left side: 4 Fe, 6 O, 1 C
Right side: 1 Fe, 6 O, 3 C
This equation is not balanced. -
FeS + 2HCl ⟶ FeCl₂ + H₂S
Left side: 1 Fe, 1 S, 2 Cl, 2 H
Right side: 1 Fe, 2 Cl, 1 S, 2 H
This equation is balanced. -
2Na₃PO₄ + 3MgCl₂ ⟶ 6NaCl + Mg₃PO₄
Left side: 6 Na, 2 P, 8 O, 6 Cl, 3 Mg
Right side: 6 Na, 1 P, 4 O, 6 Cl, 3 Mg
This equation is not balanced.
The only correctly balanced equation from the options provided is:
FeS + 2HCl ⟶ FeCl₂ + H₂S.