The pH scale is a range from which values?

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Multiple Choice

The pH scale is a range from which values?

The pH scale expresses how acidic or basic a solution is, defined as the negative logarithm of the hydrogen ion activity. In typical aqueous chemistry at room temperature, the scale is defined from 0 to 14, with 7 being neutral. Values below 7 indicate acidity, while values above 7 indicate basicity. This 0–14 range is the standard reference used in most textbooks and labs, which is why it’s the best answer. Note that in very extreme solutions or at temperatures far from 25°C, pH can go outside this range, but that’s outside the usual educational scope.

The pH scale expresses how acidic or basic a solution is, defined as the negative logarithm of the hydrogen ion activity. In typical aqueous chemistry at room temperature, the scale is defined from 0 to 14, with 7 being neutral. Values below 7 indicate acidity, while values above 7 indicate basicity. This 0–14 range is the standard reference used in most textbooks and labs, which is why it’s the best answer. Note that in very extreme solutions or at temperatures far from 25°C, pH can go outside this range, but that’s outside the usual educational scope.

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