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Why is the pH scale numbered from 0-14 instead of some other number range?
Wiki User
∙ 8y ago
In simple terms, it is because the Kw or dissociation constant for water, is 1x10^-14, so the [H+] = [OH-] = 1x10^-7 and pH and pOH both = 7 or neutrality.
Wiki User
∙ 8y ago
The pH scale is numbered from 0-14 because it corresponds to the concentration of hydrogen ions (H+) in a solution. A pH value of 7 is considered neutral, while values below 7 are acidic and values above 7 are alkaline. The range of 0-14 allows for a comprehensive representation of acidity and alkalinity levels in a solution.
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