What does the pH of a solution measure?

The pH of a solution specifically measures the degree of acidity or alkalinity. A pH scale typically ranges from 0 to 14, with values less than 7 indicating acidity, 7 being neutral, and values greater than 7 indicating alkalinity. Understanding pH is crucial in many fields, including chemistry and cosmetology, as it affects how substances interact and behave. For instance, in barbering and hairstyling, knowing the pH of shampoos, conditioners, and chemical treatments can help professionals make informed choices based on the desired results for hair care and chemical processes.