Multiple Choice
Distilled water at (at ) is considered which of the following?
25
views
17. Acid and Base Equilibrium
The pH Scale
Multiple Choice
On the pH scale, healthy human skin and hair are typically considered slightly acidic. Which pH range best matches this condition?
A
B
C
D
Verified step by step guidance1
Recall that the pH scale ranges from 0 to 14, where 7 is neutral, values less than 7 are acidic, and values greater than 7 are basic (alkaline).
Understand that 'slightly acidic' means the pH is just below 7, but not strongly acidic (which would be much lower).
Review the given pH ranges and identify which ranges fall below 7, indicating acidity: 1-3, 4-6, and 7-8 (though 7-8 includes neutral and slightly basic).
Recognize that healthy human skin and hair typically have a pH that is mildly acidic to protect against harmful microbes and maintain moisture, which corresponds to a pH range slightly below neutral.
Conclude that the pH range 4-6 best matches the condition of slightly acidic skin and hair, as it is mildly acidic but not strongly so.
Related Videos
Related Practice
