87.5 Theories for strong electrolyte 4. Summary Empirical law Process for establishing a theory Problem-orientation (1)Propose a simplified model Method-principle (2)Theoretical treatment Study-data ( )Experimental verification Results-analysis (4) Modification Empirical law (5)TheoryProcess for establishing a theory Problem-orientation Method-principle Study-data Results-analysis Empirical law §7.5 Theories for strong electrolyte 4. Summary