TREEO Drinking Water Treatment C Practice Exam

A solution with more hydroxide ions than hydrogen ions is classified as a basic solution. In the context of pH levels, acidic solutions have a higher concentration of hydrogen ions (H+) compared to hydroxide ions (OH-), leading to a pH below 7. Conversely, a basic solution has a higher concentration of hydroxide ions, resulting in a pH above 7.

The presence of more hydroxide ions indicates that the solution can neutralize acids, which is characteristic of basic substances. This is fundamental in understanding the acid-base balance in chemistry and in water treatment processes, where controlling pH is essential for treating drinking water effectively.

Options such as neutral refer to a balanced state where hydroxide and hydrogen ions are equal in concentration, typically at a pH of 7, while concentrated merely describes the amount of solute in a solution and does not pertain to the acid-base characterization.