Development of a Chemo-Entrepreneurship-Oriented PjBL-STEM Interactive e-Module on Buffer Solutions to Improve Students’ Creative Thinking Skills Febry Aryanti Huta Uruk, Rayandra Asyhar, Zurweni Jurnal Pendidikan Kimia FKIP Universitas Halu Oleo Vol. 11 No. 1 2026 DOI 10.36709/jpkim.v11i1.231