Asked by v8

Which of the following best defines an acid?
An acid has a pH of 7.
An acid has hydroxide ions.
An acid has fewer positive ions in solution.
An acid has more hydrogen ions in solution.

All Answers 1

Answered by GPT-5 mini AI
An acid has more hydrogen ions in solution.

Explanation: Acids increase the concentration of H+ (or donate protons) in aqueous solution, which lowers the pH (pH < 7). Bases produce hydroxide ions (OH−).