If a solution has a pH greater than 7, how is it classified?

A solution with a pH greater than 7 is classified as basic, also known as alkaline. The pH scale ranges from 0 to 14, where values below 7 indicate acidity, values at 7 indicate neutrality, and values above 7 indicate basicity. This classification is based on the concentration of hydrogen ions (H⁺) present in the solution. In basic solutions, the concentration of hydroxide ions (OH⁻) is higher than that of hydrogen ions, leading to a pH value greater than 7.

Understanding the pH scale is crucial in wastewater treatment, as it affects chemical reactions, microbial activity, and the solubility of various compounds. Basic solutions play an important role in neutralizing acids and can help in the adjustment of pH levels during treatment processes.