"sIAB" smart E-stoichiometry as a chemistry learning acid base on Android mobile

In this millennial era, technology is growing rapidly, it is hoped that everything can be digitized in order to facilitate the access process. Likewise in the education sector, digital media is expected to facilitate the work of teachers and students' understanding of material at school. Therefore we want to create an educational platform that contains a lesson in school, and we choose chemistry. After conducting the survey, the subject of chemistry lesson chosen by the respondents was stoichiometry. The name of this app is "SIAB". SIAB "Stoichiometry Acid Base"is a chemical calculator application that is useful for calculating the quantitatively between reagents (reactants) and products (reaction products) in acid base reaction. There are 3 steps methodology to implement it, first step is problem survey, to find out whether the chosen problem is related to the target. Second step is analysis, to make sure that the problem relates to the target, and the target is experiencing the chosen problem. Last step is application design to build and design SIAB apps, for the application design step there are 3 part of step. The first step, we search and gather sources that contain about acid and base chemical reaction theory, which will be used as a reference material to be displayed in the application. Then the second step is the fulfillment of the required application assets including image and audio which for help user to make more interesting and understanding easily. The third step is determining the core software used to make the application. The result of the implementation test of our application is 90% of students find this application helpful to determine the results of chemical reactions between several molecules and easier to study. This mobile application can be used to simplify the calculation of acid-base stoichiometry anytime and anywhere.