Multiple Choice
On the pH scale, when acids are added to an aqueous solution, the pH should:
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17. Acid and Base Equilibrium
The pH Scale
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On the pH scale, what is the typical (normal) pH range of healthy human skin?
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Verified step by step guidance1
Understand that the pH scale measures how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.
Recognize that healthy human skin typically has a slightly acidic pH, which helps protect against harmful bacteria and maintain the skin's barrier function.
Recall that the normal pH range of healthy human skin is slightly acidic, generally falling between 4.5 and 5.5.
Compare the given options to this known range and identify that the range 4.5–5.5 matches the typical pH of healthy skin.
Conclude that the correct pH range for healthy human skin is 4.5 to 5.5, which is slightly acidic and important for skin health.
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