what is the balanced chemical reaction occurring when aluminum is added to sulfuric acid? partial activity series k ca mg al zn fe ni pb h cu ag f₂ cl₂ br₂ i₂ 2al + 3h₂so₄ → al₂(so₄)₃ + 3h₂ 2al + 3h₂so₄ → 2alh₃ + 3so₂ + 3o₂ 2al + 3h₂so₄ → al₂(so₄)₃ + 6h no reaction occurs.

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# Brief Explanations:
1. First, check the activity series: Al is above H, so Al can displace H from sulfuric acid ($H_2SO_4$). The reaction is a single - displacement reaction (metal + acid → salt + hydrogen gas).
2. For the reaction $2Al + 3H_2SO_4
ightarrow Al_2(SO_4)_3+3H_2$:
   - Let's check the number of atoms on each side.
     - **Aluminum (Al):** On the left - hand side (LHS), we have 2 Al atoms. On the right - hand side (RHS), in $Al_2(SO_4)_3$, we have 2 Al atoms. So Al is balanced.
     - **Sulfur (S):** On LHS, in $3H_2SO_4$, we have $3\times1 = 3$ S atoms. On RHS, in $Al_2(SO_4)_3$, we have 3 S atoms. So S is balanced.
     - **Oxygen (O):** On LHS, in $3H_2SO_4$, we have $3\times4=12$ O atoms. On RHS, in $Al_2(SO_4)_3$, we have $3\times4 = 12$ O atoms. So O is balanced.
     - **Hydrogen (H):** On LHS, in $3H_2SO_4$, we have $3\times2 = 6$ H atoms. On RHS, in $3H_2$, we have $3\times2=6$ H atoms. So H is balanced.
3. For the reaction $2Al + 3H_2SO_4
ightarrow2AlH_3 + 3SO_2+3O_2$: This reaction is incorrect because the reaction of a metal with an acid (especially a strong acid like $H_2SO_4$) does not produce $AlH_3$, $SO_2$, and $O_2$ in this way. The expected products are a salt and hydrogen gas.
4. For the reaction $2Al + 3H_2SO_4
ightarrow Al_2(SO_4)_3+6H$: Atomic hydrogen (H) is not the product of the reaction between a metal and an acid. The product should be diatomic hydrogen gas ($H_2$).
5. Since Al is above H in the activity series, a reaction should occur, so the option "No reaction occurs" is incorrect.

# Answer:
A. $2Al + 3H_2SO_4
ightarrow Al_2(SO_4)_3+3H_2$

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