Colorado Barbering and Cosmetology Practice Exam

The pH range of the acid mantle of the skin is 4.5-5.5. This is because skin pH is typically slightly acidic, ranging from 4.5-5.5 on the pH scale. Options A, C, and D are incorrect because they fall outside of this typical range and therefore do not accurately represent the pH of the acid mantle. Additionally, option A has a lower value, which is too acidic for the acid mantle, and options C and D have higher values, which are too alkaline. Overall, option B is the best answer as it falls within the expected pH range for the acid mantle of the skin.