Final answer:
The ratio of OH^- and H^+ ions in a solution is important because it indicates the solution's pH level.
Step-by-step explanation:
The ratio of OH- and H+ ions in a solution is important because it indicates the solution's pH level. The pH scale is a measure of the acidity or bascicity of a solution, and it is determined by the concentration of hydrogen ions (H3O+) in the solution. High concentrations of H3O+ ions result in a low pH, indicating acidity, while low concentrations of H3O+ ions result in a high pH, indicating bascicity.