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On the pH scale, pH is a measure of which quantity in an aqueous solution?
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17. Acid and Base Equilibrium
The pH Scale
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Most living cells maintain an internal pH close to which value?
A
About (near neutral)
B
About (strongly acidic)
C
About (strongly basic)
D
About (extremely acidic)
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Understand that pH is a measure of the hydrogen ion concentration in a solution, defined as \(\mathrm{pH} = -\log[\mathrm{H}^+]\).
Recall that a pH of 7 is considered neutral, meaning the concentration of hydrogen ions equals that of hydroxide ions.
Recognize that most living cells maintain their internal environment close to neutral pH to ensure proper functioning of enzymes and biochemical processes.
Note that strongly acidic (pH 2 or 0) or strongly basic (pH 12) conditions can denature proteins and disrupt cellular activities.
Therefore, the internal pH of most living cells is maintained close to about 7 (near neutral) to support life processes.
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