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This study aimed to understand level of feasibility of learning media mobile learning for special topic of chemical equilibrium; and to know the differences of the improvement learning outcomes of students is problem based learning in learning chemical equilibrium studied by using media of Mobile Learning developed with power -point. It used R & D method (Development Research) with model ADDIE. Sample selection using purposive sampling technique. The population in this study were college student S-1 of semester II of chemistry education study program taking elementary chemistry courses even semester 2018/2019 at State University of Medan. The sample in this research are two classes in the basic course chemistry of FMIPA UNIMED department semester 2 which have 25 students for each class. The research instruments are motivation questionnaire and objective test. Data were analyzed using descriptive method and statistical analysis with independent sample t-test. The result showed that: (1) the developed learning media of Mobile Learning was categorized with feasible to used but still needs to be revised and developed, (2) there was the difference improvement learning outcomes of students (N-gain of students) for special topic of chemical equilibrium that learned using media of Mobile Learning which had been developed in experimental class I was found higher than that in experimental class IIwith power-point media (74% > 63%). Keywords— Mobile Learning, Problem Based Learning (PBL), Chemical Equilibrium, Students Achievement) Introduction

Developing Mobile Learning Media Integrated of Problem Based Learning In Chemical Equilibrium Materials at Unimed Chemical Education Study Program