The learning of principles in the context of introductory chemistry laboratory experiments in the general chemistry laboratory course syllabus is expressed [1]. The variety of qualitative and quantitative audience (students in many science and engineering courses, most medical and paramedical courses, veterinary Medicine, etc.) and consequently the high workflow of this laboratory teaching, the environment infects by chemical waste dangerous [2, 3]. This research provides after a decade of teaching the lesson and recent paper [4] by the author, in order to be properly scientific-practical manage chemical wastes in general chemistry laboratories, also addition of this important issue to purposes of this lesson[5]. The practical results of this research, while reducing waste and recycling of valuable substances. Furthermore elementary students faced with this issue in an objective and context modeling to provide their work in the future. The rate of chemical reactions, electrolysis of sulfuric acid and thermo gravimetric analysis of copper (II) oxide experiments - the seventh, eighth and ninth practical experiences of chemistry students, respectively - for the final step was selected. Retrieval methods, safety considerations, properties and price of eight chemical residues that contains: H2, MgCl2.6H2O, S2, Na2SO4.10H2O, H2SO4, ZnSO4.7H2O, Cu and Zn were clearly expressed. References: [1] Kazemi Riabi, S.H. (2012). First Acquaintance with Practicable General Chemistry and Qualitative Analysis of Inorganic Cations & Anions. One chapter (pp.1-50). Tehran : Rahpouyan kherad Publications. Available from http://www.fanouse.net [2] Ghani, M., Golbabaie, F., Akbarzadeh Baghban, A.R., Aslani, H., & Moharamnejad, N. (2012). Evaluation of Solid Waste Management in the Chemistry Laboratories of Tehran Universities. Iranian Journal of Health and Environment, 4(3), 351-362. Retrieved from http://ijhe.tums.ac.ir/browse.php?mag_id=6&slc_lang=fa&sid=1 [3] Mosavi Eshkevari, M., Qaasedi, A., & Arvand, M. (2010). Waste Management in general Chemistry Laboratory. 13th National Congress on Environmental Health. Retrieved from http://www.civilica.com/Paper-NCEH13-NCEH13_164.html [4] Kazemi, S.H., & Asoodeh, A. (2012). Recycling waste chemicals in general chemistry laboratory of ferdowsi university of mashhad (Part 1: The Law of Conservation of Mass Experiment). 3th National Congress on Safety and Chemical Waste Management. Available from http://profdoc.um.ac.ir/paper-abstract-1030420.html [5] Waddell, D. (2012, April 10) Laboratory Waste Management Guide. Seattle, WA: Local Hazardous Waste Management Program in King County. Retrieved from http://www.lhwmp.org/home/publications/index.aspx

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