Argumentation Skill Profile of Students Using Android-Based E-Module on Chemical Equilibrium Topic Muhamad Al Rasyid 1 and Crys Fajar Partana 2 {muhamad0006pasca.2019@student.uny.ac.id 1 , fajar_partana@uny.ac.id 2 } Master of Chemistry Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia 1 Department of Chemistry Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia 2 Abstract. This study aimed to describe the argumentation skills profile of students at SMAN 1 Tanjungpinang. This research used a quantitative approach with descriptive statistical methods. The sample in this study consisted of 47 students as one group. The argumentation skill test had been carried out theoretical validation by two validators and empirical validation by thirty-six students. The questions consisted of 12 description questions that require students to make arguments by following the components of claims, evidence, and justifications. The results showed that students who were given treatment using an android-based e-module experienced an increase in the achievement of the argumentation components better than students who had not been given treatment Keywords: Argumentation skill; Android-based e-module; Chemical equilibrium 1 Introduction Education is a needed process to get balance and perfection in individual and community development. The emphasis of education compared to teaching lies in the formation of the consciousness and personality of the individual or society as well as the transfer of knowledge and expertise. Through this kind of process, a nation or state can pass on religious values, culture, thoughts, and expertise to the next generation so that they are truly ready to face a brighter future of the nation and state. Education is interrelated with the process of activities carried out by individuals to gain knowledge, instill attitudes, and develop skills to strengthen self-potential that must be possessed as an individual being or as a social being [1][2]. The proper education creates competent and quality human resources. Education serves to develop students' potential to be more confident, foster curiosity, be creative, innovative, and understand differences in the learning environment and community environment [3]. The quality of education in Indonesia is still low, this is due to low physical facilities [4]. Therefore, the media is needed as a means in the learning process to improve the quality of education. One of the media that can be used is technology based on the Android Operating System. The development of technology in the 21st century give an impact on all aspects of life, including in the field of education. Technological developments require innovation in the use of technology in learning [5]. The necessity for the use of technology in the learning process is also enshrined in the 2013 curriculum so that educators and students as educational actors must be able to use technology as a practical and easy-to-use learning tool. The use of virtual learning ICEHHA 2021, June 03-05, Flores, Indonesia Copyright © 2021 EAI DOI 10.4108/eai.3-6-2021.2310675