BINTARTI, NIM 1910247944. Development of Android-based Interactive Multimedia Integrated Problem Base Learning as an Effort to Increase Student Mastery of Concepts and Learning Independence in Class XII Science Redox and Electrochemistry Material guided by Mrs. Dr. Roza Linda, M. Si and Mrs. Dr. Rasmiwetti. M.S 21 st century learning in the 5.0 revolution era is closely related to the harmony …