Vermont Barbers and Cosmetologists Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

A pH of 7 is considered neutral, which is the midpoint on the pH scale ranging from 0 to 14. This scale measures how acidic or alkaline (basic) a solution is. A solution with a pH of 7 has equal concentrations of hydrogen ions (H+) and hydroxide ions (OH-), meaning it is neither acidic nor basic. This neutral point is important in many cosmetology and barbering applications since the pH of products can affect the hair and skin. For instance, using products that are too acidic or too alkaline can lead to adverse reactions or damage.

Other options refer to different pH categorizations; a pH range of 6 to 8 encompasses slight acidity and mild alkalinity, while a pH of 4 to 6 relates to mildly acidic solutions. A complete scale of 0 to 14 includes both acids and bases but does not pinpoint neutrality specifically. Thus, the clarity of pH neutrality at a level of 7 is critical for understanding various chemical interactions in beauty and personal care products.