Figure 3.05. (Continued). Notice that the Weight Percent NaCl axis and the Weight Percent Halite axis give different values for the same mixture. The Weight Percent NaCl value was calculated earlier with the equation:
In contrast, values for the Weight Percent Halite are given by:
Because the brine saturated with halite has some NaCl in it, the Weight Percent Halite (relative to Brine) in a brine-halite mixture must be less than the Weight Percent NaCl (relative to H2O) for the same mixture. Always consider the ends of the axis when trying to understand proportions like "Weight Percent" of a phase or a chemical component.
