Concept explainers
Although we did not mention it in Sec. 8.2, Eq.
In other words, the positive charges must equal the negative charges. Thus, when you compute the pH of a natural water body such as a lake, you must also account for other ions that may be present. For the case where these ions originate from nonreactive salts, the net negative minus positive charges due to these ions are lumped together in a quantity called alkalinity, and the equation is reformulated as
where
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NUMERICAL METH. F/ENGR.(LL)--W/ACCESS
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