Final answer:
To balance the equation 2 Fe + 3H₂SO₄ → 1Fe₂⁺(SO₄)3 + _ H₂, we need to add the coefficient 3 in front of H₂ on the right side.
Step-by-step explanation:
The balanced equation given is:
2 Fe + 3H₂SO₄ → 1Fe₂⁺(SO₄)3 + _ H₂
To balance this equation, we need to ensure that there are an equal number of each type of atom on both sides of the equation. In this case, we have 2 iron (Fe) atoms on the left side and only 1 iron (Fe) atom on the right side.
Therefore, we need to add a coefficient of 2 in front of Fe on the right side to balance the equation. The balanced equation is:
2 Fe + 3H₂SO₄ → 1Fe₂⁺(SO₄)3 + 3 H₂