What is a solution with a pH above 7 classified as?

A solution with a pH above 7 is classified as an alkaline solution. This classification is based on the pH scale, which ranges from 0 to 14. A pH of 7 is considered neutral, indicating that the solution is neither acidic nor alkaline. Values below 7 represent acidic solutions, which have a higher concentration of hydrogen ions (H+). Conversely, when the pH is above 7, the concentration of hydroxide ions (OH−) dominates, making the solution basic or alkaline. This is significant in various applications, including cosmetics, where the pH level of products can affect their performance and suitability for different skin types. Understanding the concept of pH is crucial for professionals in the cosmetology field, as it helps in selecting the right products for specific treatments.