What does a pH higher than 7 indicate?

A pH higher than 7 indicates a base. The pH scale ranges from 0 to 14, with values below 7 representing acidic solutions, a value of 7 indicating a neutral solution, and values above 7 indicating increasing basicity. When the pH is greater than 7, the concentration of hydroxide ions (OH-) in the solution exceeds that of hydrogen ions (H+), which is characteristic of basic substances. Therefore, a solution with a pH higher than 7 is considered to be basic or alkaline, meaning it has properties that can neutralize acids. This is an essential concept in chemistry, particularly when discussing the behavior of acids and bases in various solutions.