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Lubis, Alfi Rizkina, Ajat Sudrajat, and Asep Wahyu Nugraha. “Development of Higher Order Thinking Skill (HOTS) Assessment Instrument for Salt Hydrolysis”. Jurnal Pendidikan Kimia 14, no. 1 (April 18, 2022): 63–69. Accessed December 17, 2025. https://jurnal.unimed.ac.id/2012/index.php/jpk/article/view/31382.