Question

2 Ca(OH)2 + 2 Al2(SO4)3 + 2 CaSO4 + 2 Al(OH)3 → Balanced or Unbalanced

3 Mg + Fe2O3 → 2 Fe + 3 MgO → Balanced or Unbalanced
C2H4 + 3O2 → 2 CO2 + 2 H2O → Balanced or Unbalanced
2 PbSO4 → 2 PbSO3 + O2 → Balanced or Unbalanced
A) Balanced
B) Unbalanced

Answer 1

Among the provided equations, the reaction of Mg and Fe2O3 and the combustion of C2H4 are balanced, while the reaction involving Ca(OH)2, Al2(SO4)3, CaSO4, Al(OH)3, and the decomposition of PbSO4 are unbalanced.

Step-by-step explanation:

To determine if each chemical equation is balanced, we must check that the number of atoms for each element is equal on both sides of the reaction. Here is the evaluation of the provided chemical equations:

2 Ca(OH)2 + 2 Al2(SO4)3 + 2 CaSO4 + 2 Al(OH)3 is Unbalanced because it lacks product or reactant and incorrect stoichiometry.

3 Mg + Fe2O3 → 2 Fe + 3 MgO is Balanced as the number of atoms for each element is the same on each side of the equation.

C2H4 + 3O2 → 2 CO2 + 2 H2O is Balanced as it follows the conservation of mass with the correct stoichiometry.

2 PbSO4 → 2 PbSO3 + O2 is Unbalanced because disproportionation of PbSO4 does not typically yield PbSO3 and O2 as written.