OH Cosmetology Practice Questions - Ohio State Cosmetology Licensing Exam

On the pH scale used in cosmetology chemistry, which statement is correct?

A pH of 7 is acidic and will close the hair cuticle A pH below 7 is acidic; hair and skin are naturally slightly acidic (about 4.5–5.5) A pH of 14 is neutral Alkaline solutions always have a pH below 7

Correct Answer:

A pH below 7 is acidic; hair and skin are naturally slightly acidic (about 4.5–5.5)

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