Which value on the pH scale indicates a highly alkaline solution?

A value of 14 on the pH scale indicates a highly alkaline solution. The pH scale ranges from 0 to 14, where values below 7 are considered acidic, 7 is neutral, and values above 7 are alkaline or basic. A pH of 14 represents the maximum alkalinity, meaning that a solution with this pH is very effective at neutralizing acids.

The understanding of this scale is crucial in various fields, including skin science, as it affects how products interact with the skin. For example, many skin care products are formulated to fall within a specific pH range to ensure compatibility with the skin's natural barrier. Knowing that a pH of 14 is highly alkaline helps in identifying products that can potentially disrupt the skin’s natural acidity, possibly leading to imbalances.