What term is used to describe a solution with a pH greater than 7.0?

A solution with a pH greater than 7.0 is referred to as either alkaline or basic, both of which describe the same state. Solutions with a pH above 7.0 have a lower concentration of hydrogen ions compared to pure water, which has a pH of 7.0 and is considered neutral. In hair coloring and cosmetology, understanding pH is crucial because it affects the chemical behavior of the products used. Alkaline solutions are commonly used in hair color and chemical relaxers as they help to swell the hair cuticle, allowing for better penetration of color or relaxers into the hair shaft.

In a broader context, alkaline solutions can neutralize acids, which is important in various chemical processes in both hair care and general chemistry. This knowledge helps professionals formulate products effectively for various hair types and conditions.