This research aims to develop E-LKPD on scientific approach using adobe acrobat 11 pro extended on acids and bases for grade XI SMA/MA. E-LKPD on scientific approach to the stage of the scientific approach. The type of this research is research and development (R and D) with reference to the development process of Plomp, but only up to the limited trial stage. The object of this research is E-L…