Multiple Choice
On the pH scale, what do we call a solution with a pH of at ?
7
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17. Acid and Base Equilibrium
The pH Scale
Multiple Choice
In healthy adults, what is the typical pH range of human skin (the “acid mantle”)?
A
Approximately
B
Approximately
C
Approximately
D
Approximately
Verified step by step guidance1
Understand that pH is a measure of the hydrogen ion concentration in a solution, with lower pH values indicating acidity and higher values indicating alkalinity.
Recognize that the skin's surface, known as the 'acid mantle,' has a slightly acidic pH to protect against harmful microbes and maintain skin health.
Recall that neutral pH is 7.0, and typical human skin pH is slightly acidic, meaning it is below 7 but not extremely low.
Identify that the typical pH range of healthy human skin is approximately between 4.5 and 5.5, which helps maintain the skin's barrier function.
Conclude that the correct pH range for the acid mantle is approximately \$4.5 - 5.5$, distinguishing it from neutral (7.0-7.4), highly acidic (1-2), or highly alkaline (11-12) values.
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