Multiple Choice
On the pH scale, which pH range corresponds to acidic solutions?
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17. Acid and Base Equilibrium
The pH Scale
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Hair, skin, and nails are generally considered to be slightly acidic. Which pH range best describes their typical surface pH?
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Verified step by step guidance1
Understand that pH is a measure of the acidity or basicity of a solution, with values below 7 indicating acidity, 7 being neutral, and above 7 indicating basicity.
Recognize that the surface of hair, skin, and nails is known to be slightly acidic to help protect against harmful microbes and maintain healthy conditions.
Recall that a 'slightly acidic' environment typically corresponds to a pH range just below neutral, which is 7.
Compare the given pH ranges to identify which one falls just below 7, indicating slight acidity.
Conclude that the pH range best describing the typical surface pH of hair, skin, and nails is the one that lies between approximately 4.5 and 6.0.
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