STUDENTS’ CONCEPTIONS, TROUBLESOME KNOWLEDGE, AND THRESHOLD CONCEPT OF CATALYST EFFECT ON REACTION RATE: STUDENTS’ CONCEPTIONS, TROUBLESOME KNOWLEDGE, AND THRESHOLD CONCEPT OF CATALYST EFFECT ON REACTION RATE. JPMIPA [Internet]. 2022 Jun. 1 [cited 2026 Jul. 1];27(1):1-8. Available from: https://ejournal-science.upi.edu/jpmipa/article/view/811