The reaction between sulfuric acid (H₂SO₄) and magnesium sulfide (MgS) is a double displacement reaction that produces hydrogen sulfide gas (H₂S) and magnesium sulfate (MgSO₄).

Here's the balanced chemical equation:

H₂SO₄ (aq) + MgS (s) → H₂S (g) + MgSO₄ (aq)

Here's a breakdown of the reaction:

* H₂SO₄ (aq): Sulfuric acid in aqueous solution (dissolved in water).

* MgS (s): Magnesium sulfide in solid form.

* H₂S (g): Hydrogen sulfide gas.

* MgSO₄ (aq): Magnesium sulfate in aqueous solution.

Important Note: This reaction produces hydrogen sulfide gas, which is highly toxic and flammable. Therefore, this reaction should only be conducted in a well-ventilated area and by experienced personnel.