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 Rules The solubility of ionic compounds in aqueous solutions is wide and varied. Some compounds are highly soluble (e.g. NaCl), some compounds are moderately soluble (e.g. SnI2) and some compounds are highly insoluble (e.g., AgCl).Determining which compounds are soluble and not soluble in a water medium is not a simple task.However, a set of rules that help in this regard can be stated.These rules are known as solubility rules. Below is a set of solubility rules.etermining which compounds are soluble and not soluble in a water medium is not a simple task. However, a set of rules that help in this regard can be stated. These rules are known as solubility rules. Below is a set of solubility rules.