The aim of the present work was to identify the argumentative and representative levels of students about chemical solutions. It was included in a descriptive study of the initial state for which a pencil and paper instrument was designed to collect the information, the study population, the life of the 10-2 degree of the Integral College Llano Grande of the municipality of Giron, Santander, constituted by 28 students, between 14 and 17 years old. The information once transcribed and systematized, was organized in matrices, in which the components of the arguments in each answer were recognized, to locate them in the argumentative levels. Subsequently, through the technique of content analysis, discourses were followed to identify the mental representations of the students. It was possible to identify as a result a greater tendency at argumentative level 2 (80%) for justifications made up of data and a single conclusion (Tamayo., 2011). Likewise, the total tendency to locate at representative level 1 (100%) was identified by the arguments in a macroscopic way as a sensory perception of the phenomena of dissolutions (Johnstone., 1982). It is concluded that the levels of argumentation of the students on the solutions were level 2 and that the arguments are justified. The levels of representation are identified at the representative level 1 or macroscopic and the arguments approach the phenomena of the macroscopic way as a sensory perception of the phenomena that occur in the dissolutions.