Solubility Rules =================================================================================================== The solubility rules given below are for ionic compounds or salts . Therefore, these rules do not apply to molecular compounds such as acis, e.g. HCl, H 2 S, H 2 SO 4 , HC 2 H 3 O 2 , etc. or organic compounds, e.g. C 2 H 5 OH. A soluble ionic compound dissolves to a significant extent in water and is generally defined as having a solubility in water of > 0.1 M. An insoluble ionic compound does not dissolve to a significant extent in water and is generally defined as having a solubility in water of < 0.1 M. Please not that the 0.1 M dividing line, between soluble and insoluble, is a man-made rule, i.e., not a fundamental law of nature. Therefore ionic compounds with intermediate solubilities, i.e., near the 0.1 M limit, may be classified as soluble in one source but insoluble in another source. In other words this presentation, ionic compounds with intermediate solubilities will be specified as
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