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In general chemistry, what does the pH scale measure in an aqueous solution?
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17. Acid and Base Equilibrium
The pH Scale
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On the pH scale at , which pH value indicates an acidic solution?
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Understand that the pH scale ranges from 0 to 14 at 25\(\degree\) C, where pH is a measure of the hydrogen ion concentration in a solution.
Recall that a pH value of 7 is considered neutral, meaning the concentration of hydrogen ions (H\(\textsuperscript{+}\)) equals the concentration of hydroxide ions (OH\(\textsuperscript{-}\)).
Recognize that pH values less than 7 indicate an acidic solution, where the concentration of H\(\textsuperscript{+}\) ions is greater than OH\(\textsuperscript{-}\) ions.
Note that pH values greater than 7 indicate a basic (alkaline) solution, where OH\(\textsuperscript{-}\) ions are more concentrated than H\(\textsuperscript{+}\) ions.
Therefore, any pH value below 7, such as 3, indicates an acidic solution.
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