We can see that points A, B, C and D are all still coplanar points. Point E is not coplanar with the original four points. But if I pick any group of three of the points, even a group containing point E, those three points will be coplanar. The reason is the statement given above - any three points in 3-dimensional space determine a plane.
Definition of solubility. 1  1 : the quality or state of being soluble. 2  2 : the amount of a substance that will dissolve in a given amount of another substance.
Solubility The solubility of a substance is the amount of that substance that will dissolve in a given amount of solvent. The default solvent is water, if not indicated. Insoluble in water; slightly soluble in acid and alkali solutions Haynes, W.M. (ed.).