Viodelf, Tiara and Ellizar, Ellizar and Andromeda, Andromeda and Nizar, Umar Kalmar and Zulnata, Charles (2019) Improving Students' Critical Thinking Skills Through Buffer Solutions Module Based on Scientific Approaches Assisted Probing Prompting Questions at SMAN 1 Payakumbuh. International Journal of Progressive Sciences and Technologies (IJPSAT), 15 (2). pp. 63-67. ISSN 2509-0119