Siregar T, Wulandary S, Samosir H, Kelmaskosu NDS. DEVELOPMENT OF CHEMISTRY MODULE OF ACID-BASE SOLUTION MATERIALS BASED ON PROBLEM-BASED LEARNING. J. IPI [Internet]. 2025 Jun. 19 [cited 2025 Aug. 23];13(2):88-94. Available from: https://mail.ejournal.uncen.ac.id/index.php/JIPI/article/view/4741