The Development of Guided Inquiry Worksheet on Acid and Base Experiment for Grade XI

This research aims to generate the development of guided inquiry worksheet on acid and base experiment for grade XI valid and practical. This development research using stages of 4-D model i.e define, design, develop, and disseminate. Instruments of data collection used is validation sheet and practicality questionnaire. The developed experiment worksheets based on guided inquiry was validated by five expert and practicality test by 26 students eleven-grade. The data obtained were analyzed using Kappa Cohen Formula. The data obtained were analyzed by using Cohen Kappa Formula. The validity test of the developed experiment worksheets based on guided inquiry is in high validity categories. The practicality test of students about developed experiment worksheets based on guided inquiry indicated a very high category. While the teacher practicality about developed student worksheet obtain a very high practicality category.This finding also suggests that the developed experiment worksheets based on guided inquiry can help students to learn find the concepts of chemistry. In conclusion, the worksheet can be used in chemistry learning process in laboratory (acid and base experiment).