Which statement correctly defines an Arrhenius acid?

Which statement correctly defines an Arrhenius acid?

• A. Donates hydroxide ions in aqueous solution.
• B. Produces hydrogen ions in aqueous solution.
• C. Accepts protons in solution.
• D. Decomposes to metal and nonmetal.

Answer: (B)

Arrhenius acids are substances that increase the concentration of hydrogen ions in aqueous solution. In water, those H+ ions are present as hydronium (H3O+), so acids release H+ when dissolved. That’s why the statement about producing hydrogen ions in aqueous solution is correct. Releasing hydroxide ions would define an Arrhenius base, accepting protons fits Bronsted-Lowry base behavior, and decomposing into metal and nonmetal isn’t related to acid–base definitions.

Arrhenius acids are substances that increase the concentration of hydrogen ions in aqueous solution. In water, those H+ ions are present as hydronium (H3O+), so acids release H+ when dissolved. That’s why the statement about producing hydrogen ions in aqueous solution is correct. Releasing hydroxide ions would define an Arrhenius base, accepting protons fits Bronsted-Lowry base behavior, and decomposing into metal and nonmetal isn’t related to acid–base definitions.