On which side of the pH scale does one find more OH- ions than H+ ions?

The pH scale measures the concentration of hydrogen ions (H+) in a solution, which allows us to categorize solutions as acidic, neutral, or basic (alkaline). A basic solution is characterized by the presence of more hydroxide ions (OH-) than hydrogen ions (H+).

In basic solutions, the pH value is greater than 7, indicating that the concentration of OH- ions exceeds that of H+ ions. This shift towards more OH- forms the defining nature of a basic solution, making it alkaline. Conversely, acidic solutions have a pH less than 7, which means they have a higher concentration of H+ ions compared to OH- ions. When the pH is 7, the solution is neutral, indicating equal concentrations of H+ and OH- ions.

The option referring to basic solutions correctly identifies the region of the pH scale where OH- ions predominate over H+ ions, establishing it as the correct answer.