Development of Instructional Materials Hydrolysis of Salt Based Guided-Inquiry With Representation of Chemistry-Triangle For High School Students

This research aims to produce teaching materials based material salt hydrolysis GuidedInquiry with representation Chemistri Triangle in the form of student worksheet is valid and practical worksheets used in teaching chemistry at high school / MA. This type of research included in Research and Development (R & D). Development models used in this study were four-D (4-D). The research instrument is a validation sheet and questionnaire. Data from the study consists of three aspects: validity, practicalities and effectiveness of teaching materials. Data validity and practicalities processed using a formula Kappa, and the effectiveness of data using percentages In this study only looked at the validity and practicalities. Validation of teaching materials from the aspect of content, language and graph and construct validity has been done. Data from the validator obtained an average score kappa moment is; 0,795, and the results of practical analysis conducted with limited testing in SMAN 8 Padang obtained an average score of 0.95 practicality value of 0.88 of teacher and student. These results indicate that the teaching materials developed salt hydrolysis has validity and practicality are very high