What does the line in a solubility chart mean?

1 Answer

The line in a solubility chart shows, for the substance it is referring to, the solubility of that substance at a specific temperature (or whatever the independent variable is on the chart).

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(image from www.sciencegeek.net)

For example, in the above graph, the purple ( #Ce_2 (SO_4)_3# ) line, when at #10^o C#, has a solubility of 10 grams of salt in 100 grams of #H_2O#.