Edukimia e-ISSN: 2502-6399 http://edukimia.ppj.unp.ac.id/ojs/index.php/edukimia/ RESEARCH ARTICLE 2023 • Vol. 5, No. 1 033 Yusmaita, and Desviani Analysis of Student’s Chemical Literacy on Buffer Solution Material using the Rasch Model at SMAN 1 Tilatang Kamang E Yusmaita 1* , and T Desviani 1 1 Pendidikan Kimia, Universitas Negeri Padang, Jl. Prof. Dr. Hamka, Air Tawar Barat, Padang Utara, Sumatera Barat, Indonesia. 25171. * ekayusmaita@fmipa.unp.ac.id ABSTRACT The purpose of this study was analyze the level of chemical literacy of students at SMAN 1 Tilatang Kamang on the buffer solution material using the Rasch model with the Winstep application. This research method is a descriptive study with a quantitative approach with a sample of 75 students of 3th grade students at SMAN Tilatang Kamang. The chemical literacy test was carried out using a chemical literacy-based question instrument amount 11 items. Data on chemical literacy test results were analyzed using the Rasch model. Scalogram analysis based on the ability of student who have high abilities is 35L and student who have lowest ability is subject 02L. Based on the level of diffculty of the items, the most diffcult item is number 8 (theme 4) and the easiest item is number 10 (theme 6). Most of the chemical literacy analysis description of students at SMAN 1 Tilatang Kamang are at the Scientifc Illiteracy level of 39%. KEYWORDS Buffer Solution, Chemical Literacy, Rasch Model, Winstep ARTICLE INFO Received on: 06 February 2023 Revised till: 28 February 2023 Accepted on: 28 February 2023 Publisher version published on: 25 May 2023 https://doi.org/10.24036/ekj.v5.i1.a456