Question

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.

Explanation:

An acid is a substance that donates hydrogen ions (H⁺) in solution. A pH of 7 is neutral, bases have hydroxide ions, and acids have more positive - hydrogen ions in solution rather than fewer positive ions.

Answer:

An acid has more hydrogen ions in solution.