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One of these "and-milliliters-are-not-really-cc's"-type technicalities... activity, not concentration. Dump it in a footnote where it won't bother anyone
pH equal to 7 is considered to be neutral. This is the pH of pure water at a temperature of 25 °C.
pH equal to 7 is considered to be neutral. This is the pH of pure water at a temperature of 25 °C.
pH is a logarithmic scale based on the concentration of protons(H+) in the solution. Thus, a change of pH by 1 corresponds to a change in concentration by a factor of 10. In general, the pH of most substances varies from 0 to 14 although for some extreme cases the pH can be greater than 14 or less than 0.
pH is a logarithmic scale. Roughly, it can be considered to be based on the concentration of protons(H+) in the solution.<ref>Actually, it is based on something called the hydrogen ion ''activity.'' Activity is approximately the same as concentration for dilute solutions in nearly pure water.</ref> Thus, a change of pH by 1 corresponds to a change in concentration by a factor of 10. In general, the pH of most substances varies from 0 to 14 although for some extreme cases the pH can be greater than 14 or less than 0.
==Notes and references==
<references/>