Here's why:
* Hydrogen sulfate refers to the anion HSO₄⁻, which is the conjugate base of sulfuric acid (H₂SO₄).
* Aqueous indicates that the substance is dissolved in water.
When sulfuric acid dissolves in water, it ionizes to form hydrogen ions (H⁺) and hydrogen sulfate ions (HSO₄⁻):
H₂SO₄ (aq) + H₂O (l) ⇌ H₃O⁺ (aq) + HSO₄⁻ (aq)
Therefore, aqueous hydrogen sulfate and sulfuric acid are essentially the same thing in solution.
