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KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia
Published by Universitas Samudra
ISSN : 2721902X     EISSN : 27219038     DOI : https://doi.org/10.33059/katalis.v4i1.3106
Core Subject : Science, Education,
Chemistry Education
Jurnal Katalis, merupakan jurnal ilmiah yang dalam bidang penelitian kimia dan pendidikan kimia yang dikelola oleh Program Studi Pendidikan Kimia, Fakultas Keguruan dan Ilmu Pendidikan Universitas Samudra. Jurnal Katalis terbit secara berkala dua kali setiap tahunnya yaitu edisi Januari-Juni dan Juli-Desember dengan isi sebanyak 6 artikel/volume atau 12 artikel/nomor terbit. Jurnal Katalis dirancang sebagai bentuk komitmen Program Studi Pendidikan Kimia dalam upaya memfasilitasi para peneliti, dosen, mahasiswa dan guru agar dapat mempublikasikan hasil penelitiannya secara daring dan cetak. Fokus kajian: 1. Pendidikan Kimia 2. Penelitian Kimia (kimia organik, biokimia, kimia anorganik, kimia fisik, kimia analitik, kimia lingkungan, dan kimia bahan alam) 3. Komputasi kimia
Arjuna Subject : Umum - Umum
Articles 108 Documents
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PENGEMBANGAN LKPD SIFAT KOLIGATIF LARUTAN BERBASIS PBL UNTUK MENGUKUR KETERAMPILAN BERPIKIR KRITIS PESERTA DIDIK Jaman Fahmi; Budiman Anwar; Wulan Dwi Safitri; Dwi Sapri Ramadhan; Dian Wardana; Dimas Ridho; Ekin Dwi Arif Kurniawan; Ahmad Fauzi Syahputra Yani
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 1 (2026): Jurnal Katalis Volume 9 Nomor 1 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i1.13597

Abstract

This study aims to develop a PBL (Problem-Based Learning) based Student Worksheet (LKPD) on the topic of colligative properties of solutions that are valid, reliable, and feasible to be used as an instrument for assessing students’ critical thinking skills. This research employed a Type 1 Design and Development Research (DDR) model consisting of the stages of Analysis, Design, Development, Try-out, and Evaluation, although its implementation was limited to the Try-out stage. The study involved validators comprising university lecturers and chemistry teachers, as well as 106 twelfth-grade science students from MAN 2 Model Medan selected through purposive sampling. Data were collected using semi-structured interview guidelines and assessment questionnaires and subsequently analyzed using the Content Validity Ratio (CVR), Content Validity Index (CVI), item validity tests, reliability analysis, item difficulty index, discrimination index, normality, and homogeneity tests. The findings indicate that out of 16 initial items, 11 essay items were found to be valid (Pearson Corelation > 0,3) and reliable with internal reliability coefficients categorized as good (Cronbach’s Alpha > 0.7). The difficulty indices of the items ranged from difficult to easy, with discrimination indices categorized as moderate to very good. Therefore, the developed PBL-based LKPD is deemed feasible for use in measuring students’ critical thinking skills in the context of colligative properties of solutions.
Survey on Common Spelling Errors in Chemistry Students’ English Reports salma malka; wahyu nengsih; tesya wijaya
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 1 (2026): Jurnal Katalis Volume 9 Nomor 1 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i1.13713

Abstract

The research examines widespread spelling mistakes in chemistry students' laboratory reports, the factors that influence them, and the degree of accuracy in scientific writing. The research design for this study was quantitative and descriptive narrative, and the study was conducted with 58 chemistry students from various universities in Indonesia. Using a 35-item Likert-scale questionnaire, data were collected and analyzed using descriptive statistics. The results show that spelling errors are still very common, especially in long, complex scientific words that are rarely used in everyday language. The foremost among these are first-language transfer, insufficient knowledge of scientific lexis, lack of exposure to English orthographic conventions, and limited access to scientific writing. The evidence demonstrates that students have a high level of awareness of spelling as a source of clarity and credibility in academic reports, yet at times this awareness is not reflected in their writing. They are also dependent on external services, for example, spell-checkers. Their strategies for improvement generally rely on external support rather than on their own resources to foster autonomous spelling development. These findings demonstrate that stronger instruction in English spelling and more intensive scientific writing practice are needed to improve chemistry students' spelling accuracy as EFL academic writers. Keywords: chemistry students; error analysis; scientific writing; spelling accuracy; spelling errors
IDENTIFIKASI KEMAMPUAN LITERASI DIGITAL MAHASISWA PENDIDIKAN KIMIA PADA PEMBELAJARAN DARING Fatimatuzzahro Nurazizah; Dedi Irwandi; Evi Sapinatul Bahriah
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 2 (2026): Jurnal Katalis Volume 9 Nomor 2 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i2.14134

Abstract

The implementation of online learning as a form of adaptation to the digital era requires students to have good digital literacy skills so that learning activities can run productively, effectively, and efficiently. This study aims to determine the level of digital literacy of Chemistry Education students in online learning using Microsoft Teams. The research method used is quantitative descriptive with instruments in the form of a digital literacy questionnaire and interviews. The research sample was determined using purposive sampling technique with a total of 181 students. Data analysis was carried out using descriptive statistics. The results showed that the digital literacy skills of Chemistry Education students were in the “good” category with an average score of 79.96%. The technical dimension scored 80.06%, the cognitive dimension 79.24%, and the socio-emotional dimension 79.63%. The highest indikators included operational skills in using technological devices and Microsoft Teams, understanding digital ethics and copyright, and applying netiquette and data security protection. However, continuous strengthening of digital literacy is still needed to achieve an overall excellent category. Thus, it can be concluded that the digital literacy skills of Chemistry Education students are in the “good” category.
PEMBUATAN KERTAS INDIKATOR ALAMI DARI BUNGA TELANG (CLITORIA TERNATEA), KUNYIT (CURCUMA LONGA), DAN JANTUNG PISANG (MUSA ACUMINATA) Sahiba Sahila; Khalda Khairunnisa Mulyana; Tsalis Muthia Kamila; Mitzy Balqist Dhabitah; Nahya Alya; Achmad Dzaki; Anisa Nuraini
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 2 (2026): Jurnal Katalis Volume 9 Nomor 2 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i2.14606

Abstract

The use of synthetic indicators, which may cause chemical pollution and are relatively expensive, has encouraged the development of natural indicators that are more environmentally friendly, economical, and easily accessible. This study aimed to investigate the potential of butterfly pea flower (Clitoria ternatea), turmeric (Curcuma longa), and banana bract (Musa acuminata) extracts as materials for natural indicator paper within a pH range of 1–14. The research was conducted by extracting each material using 96% ethanol with a ratio of 1:4 for 24 hours. The resulting filtrates were diluted with distilled water and used to soak filter paper for 30 minutes to produce natural indicator papers. The indicator papers were then tested in solutions with pH values ranging from 1 to 14 to evaluate their color changes, sensitivity, and working range. The results showed that butterfly pea flower exhibited the best performance with distinct color changes from red in acidic conditions, purple near neutral pH, to green and yellow in strongly alkaline conditions. Turmeric demonstrated significant color changes mainly in alkaline conditions, changing from yellow to orange and reddish-brown, making it more suitable as an indicator for alkaline solutions. Meanwhile, banana bract showed color changes with lower intensity and less contrast compared to butterfly pea flower and turmeric. Based on the findings, butterfly pea flower has strong potential as a versatile natural indicator with a wide pH range, while turmeric is more effective for detecting alkaline solutions.
PENGARUH VARIASI KONSENTRASI GUM ARABIC TERHADAP NILAI SOLID CONTENT PADA TINTA ORGANIK BERBASIS PIGMEN ARANG TEMPURUNG KELAPA Farhan Mulya; Heribertus Rudi Kusumantoro; Rachmah Nanda Kartika
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 1 (2026): Jurnal Katalis Volume 9 Nomor 1 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i1.14814

Abstract

The development of the printing industry has increased the demand for environmentally friendly inks as an alternative to petroleum-based inks. One potential approach is the utilization of coconut shell charcoal as a carbon pigment source and gum arabic as a natural binder in organic ink formulations. This study aimed to analyze the effect of varying gum arabic concentrations on the solid content of organic ink based on coconut shell charcoal pigment. A quantitative experimental method was employed in this research. Ink samples were formulated using two pigment bases, namely ethanol and distilled water, with gum arabic concentrations of 1%, 3%, 5%, 7%, and 9%. Solid content testing was conducted using the gravimetric method by drying the samples at 105°C until a constant weight was achieved. The results indicated that increasing the concentration of gum arabic led to higher solid content values in both pigment-base formulations. The ethanol-based samples exhibited an increase in solid content from 6.73% to 13.61%, while the distilled water-based samples increased from 6.06% to 14.86%. The highest solid content value was obtained in sample AT-5 containing 9% gum arabic. These findings demonstrate that gum arabic concentration has a positive effect on the solid content of organic ink, indicating its potential to improve ink quality in terms of solid composition and printing performance.
AI-Based Interactive Powerpoint on Photosynthesis and Chemical Reactions Saidatur Rahmi; Richa Purmaya Sari; Adi Hartono
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 1 (2026): Jurnal Katalis Volume 9 Nomor 1 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i1.14881

Abstract

Photosynthesis and chemical reactions are essential concepts in biology and chemistry learning; however, students often experience difficulties in understanding these topics due to their abstract characteristics and complex processes. The integration of artificial intelligence (AI) in interactive learning media is considered capable of improving students’ conceptual understanding and engagement in science learning. This study aimed to develop and evaluate an AI-Based Interactive PowerPoint on photosynthesis and chemical reactions for biology and chemistry education. This research employed a Research and Development (R&D) approach using the 4D model, consisting of Define, Design, Develop, and Disseminate stages. The developed media integrated AI-assisted explanations, animations, interactive quizzes, and visual simulations. The research participants were students from biology and chemistry education programs. Data were collected through expert validation sheets, practicality questionnaires, and pretest-posttest instruments. The obtained data were analyzed descriptively and quantitatively using percentage analysis and N-gain scores. The findings showed that the AI-Based Interactive PowerPoint achieved a very valid category based on expert assessment and was considered highly practical by students and lecturers. Furthermore, the media effectively improved students’ understanding of photosynthesis and chemical reaction concepts, as indicated by the increase in posttest scores and positive student responses toward the learning process. The integration of AI features also encouraged more interactive, visual, and student-centered learning experiences. In conclusion, the AI-Based Interactive PowerPoint is feasible and effective as an innovative learning medium for integrated biology and chemistry education. The developed media can support meaningful science learning and enhance students’ engagement and conceptual understanding in the digital learning era.
PENGARUH JENIS PELARUT TERHADAP RENDEMAN, KANDUNGAN FLAVONOID TOTAL, DAN SAPONIN EKSTRAK DAUN SIRIH HIJAU (Piper betle L.) MENGGUNAKAN METODE SOKLETASI lutfiyatul mukhlisah; Erina Endah Kusuma Wardani; Daning Kinanti Sutama; Maghfiroh Maghfiroh
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 2 (2026): Jurnal Katalis Volume 9 Nomor 2 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i2.14977

Abstract

Green betel leaves (Piper betle L.) contain secondary metabolite compounds such as flavonoids and saponins, which have potential as antioxidants and antimicrobials. The choice of solvent type affects the effectiveness of extracting these compounds. This study aimed to determine the effect of solvent type on the extraction results of flavonoids and saponins from green betel leaves using the soxhletation method. Extraction was carried out using 25 grams of sample at a temperature of 60–90°C for 4 hours with three types of solvents, namely 96% ethanol, ethyl acetate, and n-hexane. Each treatment was performed in triplicate. The obtained extracts were tested for flavonoid and saponin content qualitatively, and total flavonoid levels were determined using UV-Vis spectrophotometry. The results showed that ethanol gave the highest flavonoid intensity (++++), followed by ethyl acetate (+++) and n-hexane (+). The saponin test showed positive results for ethanol and n-hexane, while ethyl acetate yielded negative results. The highest total flavonoid content was obtained with ethyl acetate at 637.1 mg QE/g, followed by 96% ethanol at 631.7 mg QE/g, and n-hexane at 243.4 mg QE/g. Based on these results, ethyl acetate was the most effective solvent for extracting total flavonoids, while 96% ethanol was able to extract both flavonoids and saponins more broadly.
PENGARUH PENGENCERAN DAN JENIS SIRUP TERHADAP KEKENTALAN DENGAN METODE JATUH BENDA MENGGUNAKAN FALLING BALL MOTHOD Berlinda Via Diadara; Haryanto
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 9 No 2 (2026): Jurnal Katalis Volume 9 Nomor 2 Tahun 2026
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v9i2.15129

Abstract

The Falling Ball Method is a method of measuring the viscosity of a fluid by observing the speed at which a small ball falls through the fluid. This method is based on Stokes' Law, which states that the drag force on a spherical object moving in a fluid depends on the viscosity of the fluid, the size of the sphere, and its speed of motion. This study aims to determine the effect of dilution level and syrup type on viscosity using the Falling Ball Method. This method is based on Stokes' law, where viscosity is determined based on the speed of the falling ball in the solution. The syrup samples used consisted of several types with variations in concentration of certain dilutions. A metal ball was dropped into a tube containing syrup, and the time taken to reach a certain distance was measured using a stopwatch. The results showed that the higher the level of dilution, the lower the viscosity of the solution. In addition, the difference in syrup type also had a significant effect on the viscosity value, where syrups with higher sugar content tended to have greater viscosity. This study shows that the falling object method is effective for measuring viscosity and can be used in physicochemical analysis of various types of liquids.

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