What term describes a substance with a pH greater than 7?

A substance with a pH greater than 7 is classified as alkaline. This term refers to solutions that have a higher concentration of hydroxide ions (OH-) compared to hydrogen ions (H+), resulting in a pH level exceeding the neutral point of 7. The pH scale ranges from 0 to 14, where values below 7 indicate acidity, exactly 7 indicates neutrality, and values above 7 indicate alkalinity.

The term "basic" is also often used interchangeably with alkaline, as a basic solution is one that has a higher pH. However, in the context of the question, "alkaline" is the more specific term used to describe substances with a pH greater than 7. Understanding this distinction helps in accurately categorizing substances based on their pH levels in various scientific contexts.