On the pH scale, what value represents a neutral solution?

A neutral solution on the pH scale is represented by a value of 7. The pH scale ranges from 0 to 14, with values below 7 indicating acidity and values above 7 indicating alkalinity (or basicity). A pH of 7 means that the concentration of hydrogen ions (H+) is equal to the concentration of hydroxide ions (OH-), resulting in a neutral state.

This neutral point is particularly important in various chemical and biological processes, including those in hair coloring and treatments, as many formulations are designed to work optimally at or near this neutral point. Understanding the concept of pH and its implications helps haircolorists choose the right products and techniques for their clients’ hair types and desired results.