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SPIN: Jurnal Kimia & Pendidikan Kimia
Published by Universitas Islam Negeri Mataram
ISSN : 25802623     EISSN : 27456854     DOI : https://doi.org/10.20414/spin
Core Subject : Science, Education,
Chemistry Education
SPIN adalah jurnal berkala yang diterbitkan dua kali setahun pada bulan Juni dan Desember oleh Program Studi Tadris Kimia FTK UIN Mataram. Jurnal ini berisi artikel yang diangkat dari hasil penelitian atau kajian analitis kritis kepustakaan khususnya di bidang kimia dan pendidikan kimia. SPIN: Jurnal Kimia & Pendidikan Kimia is a Chemistry and Chemistry education journal published by Program studi Tadris Kimia, Universitas Islam Negeri (UIN) Mataram. SPIN is published twice a year (June and Desember) as scientific communication means of academic people in the study of Chemistry and Chemistry education. Editorial board receives the articles from the educators, observers, researchers on chemistry and chemistry education to be published after having tight selection, peer review, and serious editing. p-ISSN: 2580-2623. e-ISSN: 2745-6854. This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 115 Documents
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DEVELOPMENT OF PROBLEM BASED LEARNING TEACHING MODULES ON GREEN CHEMISTRY MATERIALS Khoirunnisa, Rahmah; Wijayanti, Imas Eva; Assaat, Lusiani Dewi
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 6 No. 2 (2024): July - December 2024
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v6i2.10548

Abstract

The change from the 2013 curriculum to an Merdeka curriculum requires adjustments for teachers and students. The lack of availability of teaching tools that are in accordance with the Merdeka curriculum and a learning approach that is still teacher-centered makes students less motivated to participate in learning. The purpose of this study is to develop a PBL-based teaching module on green chemistry material by determining the validity, practicality, and effectiveness of student responses to the content measured in the teaching module. This research is R&D (Research and Development) research with the ADDIE (Analyze, Design, Develop, Implement, Evaluate) model. The data collection technique used a material and media validation questionnaire involving seven material and media expert validators and was analyzed using the Aiken's V test. Furthermore, the validated teaching module was tested limited to 26 class X phase E students. The development of this PBL-based teaching module obtained results in the validity of the material and media of 0.91 and 0.92 in the "Valid" category. Then it was implemented with students in class X-5 and received a response of 83.27% in the "Very Practical" category. Furthermore, the results of the LKPD assignment in the module obtained an average of 83.15% which indicates "Very Effective". Thus, this PBL-based teaching module is suitable for use as a learning tool.
SYNTHESIS AND CHARACTERIZATION OF SnO2/ZnO COMPOSITE USING JAPANESE PAPAYA LEAF EXTRACT (Cnidoscolus aconitifolius) WITH HYDROTHERMAL METHOD Puspita, Heni; Agustin, Rika; Asdim; Angasa, Eka; Maryanti, Evi; Martono Hadi Putranto, Agus
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 6 No. 2 (2024): July - December 2024
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v6i2.10997

Abstract

SnO2/ZnO composites were synthesized using the hydrothermal method using Japanese papaya (Cnidoscolus aconitifolius) leaf extract. This study aims to determine the effect of using Japanese papaya leaf extract (Cnidoscolus aconitifolius) on the formation of crystallinity and morphology in synthesizing SnO2/ZnO composites. Synthesis was carried out with variations in mass of 5, 10, and 15 grams using the hydrothermal method for 12 hours at 160°C. The results of X-Ray Diffraction (XRD) characterization show that wide diffractogram peaks are identified as the peaks of the SnO2 compound with a tetragonal structure and sharp peaks are identified as the peaks of the ZnO compound. The Fourier Transform Infrared (FTIR) characterization shows the peak wave number of 665 cm-1 which is the Sn-O-Sn strain and the peaks at wave numbers 598 cm-1 and 501 cm-1 which are the Zn-O strain. Characterization of Scanning Electron Microscopy (SEM) in the synthesis of SnO2/ZnO composites after adding Japanese papaya (Cnidoscolus aconitifolius) leaf extract had relatively reduced particle size and aggregate formation compared to no extract. The best effective mass of Japanese papaya leaf extract (Cnidoscolus aconitifolius) is the mass variation of 15 grams with 28.49 nm crystals.
DEVELOPMENT OF A SCIENCE (CHEMISTRY) PROJECT TEACHING MODULE IN THE MERDEKA CURRICULUM AS A TEACHER’S GUIDE FOR LEARNING IN CLASS X VOCATIONAL SCHOOLS Diva, Felia Aura; Muntari; Junaidi, Eka
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 6 No. 2 (2024): July - December 2024
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v6i2.11223

Abstract

This research is a development research that aims to produce an IPAS (Chemistry) Project teaching module as a teacher's guide in learning, which is feasible in terms of validity and practicality. This module development adapts the 4D model (Define, Design, Develop, Disseminate) because the stages are arranged in detail and systematically, involving revisions, trials, and validation by experts. The test subjects were class X students of SMKN 1 Narmada with the Agribusiness of Agricultural Product Processing (APHP) expertise program. The research instruments included validation sheets and student and teacher response questionnaires. Data analysis used descriptive statistics, with module validity calculated using Aiken's V formula, and module practicality analyzed using a Likert scale. The results showed the average validity of the four validators was 0.861, which was classified as very valid. The level of understanding between validators was tested using the Percentage of Agreement (R) method, resulting in an average of 0.90 with a reliable category. The practicality of the module based on teacher and learner response questionnaires showed an average percentage of 94% and 81%, respectively. Based on these results, it can be concluded that the IPAS (Chemistry) Project teaching module on substance material and its changes for class X SMK has a high level of validity and practicality, so it is suitable for use in the learning process.
DEVELOPMENT OF CHEMISTRY TEACHING MODULE BASED ON DIFFERENTIATION LEARNING TO IMPROVE STUDENT LEARNING OUTCOMES ON ATOMIC STRUCTURE MATERIAL Hartati, Ajeng; Wijayanti, Imas Eva; Solfarina
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 6 No. 2 (2024): July - December 2024
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v6i2.11280

Abstract

Atomic structure material is relatively complex and abstract material so it requires in-depth understanding and good visualization so that it is easy for students to understand. Differences in students' initial understanding and learning styles are the trigger for low student learning outcomes in atomic structure material. The solution is to apply differentiated learning. This research aims to develop a chemistry teaching module based on differentiated learning that can improve student learning outcomes in atomic structure material, especially in electron configuration material and the periodic system of elements. This development research uses the ADDIE model. The results of the research show that the chemistry teaching module based on differentiated learning in atomic structure material obtained a very feasible category in the material field with a percentage of 89.76% and obtained a very feasible category in the media field with a percentage of 88.59%. The chemistry teaching module based on differentiated learning is effective in improving student learning outcomes as shown by the acquisition of the Wilcoxon test, namely the Asymp.Sig value. (2-tailed) is 0.000. The results of students' responses to the chemistry teaching module based on differentiated learning on atomic structure material obtained an average percentage of 82.38% in the very good category, so that the chemistry teaching module based on differentiated learning on atomic structure material is suitable for use as a learning medium that can help participants. students to improve their learning outcomes.
THE THE EFFECT OF HCl ACTIVATOR CONCENTRATION ON THE EFFECTIVENESS OF ACTIVATED CARBON DERIVED FROM CORNCOBS FOR METHYLENE BLUE ADSORPTION Setyaningrum, Dyah; Fajarwati, Novia; Maghfiroh, Amalia
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 6 No. 2 (2024): July - December 2024
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v6i2.11516

Abstract

This study aimed to investigate how activator hydrochloric acid (HCl) concentration affects the adsorption capacity of corncob-activated carbon in Methylene Blue (MB) dye.  This was followed by immersion in HCl solutions with various concentrations (2.5 M; 3M; 3.5 M; and 4 M) as chemical activating agents. Next, FTIR and XRD were used to characterize the activated carbon that had been activated and unactivated. The study analyzed the reduction of methylene blue dye concentration in the air to evaluate the effectiveness of activated carbon as an adsorbent. It examined various factors influencing the adsorption process, including different initial concentrations of the azo dye (20 ppm, 30 ppm, 40 ppm, 50 ppm, and 60 ppm) and contact times (15, 30, 45, and 60 minutes). The experimental results indicated that a 3 M concentration of HCl was the most effective activator, leading to a maximum dye removal rate of 80.77%. For an initial concentration of 20 ppm of the azo dye, the highest adsorption results were achieved at 85.67%. Furthermore, the optimal contact time for maximum adsorption was found to be 30 minutes, with a peak adsorption rate of 70.08%. The Langmuir adsorption isotherm model demonstrated a better fit for the adsorption of methylene blue onto corncob-activated carbon. It can be concluded that activated carbon produced from corn cobs and treated with HCl is an effective adsorbent for reducing methylene blue levels in the solution.
SYNTHESIS OF ALPHA TERPINEOL FROM THE ESSENTIAL OIL OF SAPU-SAPU PLANT USING A COMBINATION OF NATURAL ACID CATALYST OF STARFRUIT AND SYNTHETIC ACID lestari, Dea; Occa Roanisca; Nurhadini
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.11485

Abstract

Belimbing wuluh (Averrhoa bilimbi L.) adalah tumbuhan yang tidak termasuk kedalam tumbuhan musiman yang banyak tumbuh di Bangka Belitung dan memiliki rasa yang asam. Buah belimbing wuluh memiliki kandungan AHA seperti asam malat, asam askorbat, dan asam sitrat. Potensi rasa asam buah belimbing wuluh dapat digunakan sebagai katalis pada sintesis alfa terpineol dari alfa pinene minyak atsiri tumbuhan sapu-sapu. Alfa terpineol dapat disintesis dengan tanpa kombinasi dan kombinasi katalis. Katalis yang digunakan seperti asam sulfat 15%, asam asetat 99,5%, dan asam buah belimbing wuluh. Tujuan dari penelitian ini adalah dapat mengetahui persen area alfa terpineol dengan variasi komposisi katalis, dan dapat menentukan kadar alfa terpineol dengan variasi komposisi katalis. Persen area alfa terpineol yang dihasilkan tertinggi pada katalis asam sulfat (15%) sebesar 16,76%, katalis kombinasi 1 sebesar 12,13%, katalis kombinasi 2 sebesar 8,38%, katalis asam asetat (99,5%) sebesar 3,22%, dan katalis asam buah belimbing wuluh sebesar 0,42%. Kadar alfa terpineol yang dihasilkan tertinggi pada katalis asam sulfat (15%) sebesar 33,14%, katalis kombinasi 1 sebesar 23,99%, katalis kombinasi 2 sebesar 16,57%, katalis asam asetat (99,5%) sebesar 6,36%, dan katalis asam buah belimbing wuluh sebesar 0,83%.   Belimbing wuluh (Averrhoa bilimbi L.) is a plant that is not included in seasonal plants that grow in Bangka Belitung and has a sour taste. Starfruit contains AHA compounds, including malic acid, ascorbic acid, and citric acid. The potential sour taste of starfruit can be used as a catalyst in the synthesis of alpha terpineol from alpha pinene of sapu-sapu essential oil. Alpha terpineol can be synthesized with no catalyst or a combination of catalysts. The catalysts used are sulfuric acid (15%), acetic acid (99.5%), and starfruit acid. The purpose of this study was to determine the percentage area of alpha terpineol with variations in catalyst composition, and to determine the levels of alpha terpineol with variations in catalyst composition. The percentage area of alpha terpineol produced was highest in sulfuric acid catalyst (15%), at 16.76%, combination catalyst one at 12.13%, combination catalyst two at 8.38%, acetic acid catalyst (99.5%) at 3.22%, and starfruit acid catalyst at 0.42%. The highest alpha terpineol content was produced in sulfuric acid catalyst (15%) at 33.14%, combination catalyst one at 23.99%, combination catalyst two at 16.57%, acetic acid catalyst (99.5%) at 6.36%, and starfruit acid catalyst at 0.83%.
CHARACTERISTICS OF CHITOSAN-ALGINATE BASED FILM AS ACTIVE PACKAGING WITH THE ADDITION OF MORINGA LEAF EXTRACT (Moringa oleifera L) Rezeki, Yupita Tri; Riyandari, Baiq Amelia; Yahdi
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.11800

Abstract

Tujuan utama dari penelitian ini adalah untuk mengetahui pengaruh penambahan ekstrak daun kelor terhadap sifat fisik, sifat mekanik dan aktivitas antioksidan film kitosan alginat. Jenis penelitian yang digunakan pada penelitian ini adalah penelitian ekperimen (true eksperimen). Sedangkan pendekatan yang digunakan pada penelitian adalah pendekatan kuantitatif. Desain penelitian yang digunakan pada penelitian ini adalah rancangan acak lengkap (RAL) non faktorial dengan tiga kali pengulangan. Faktor yang diteliti adalah konsentrasi dari ekstrak daun kelor, konsentrasi ekstrak daun kelor (E) yang digunakan meliputi: E1=0,5%, E2=0,75%, E3=1%.  nilai yang diperoleh kemudian dianalisis menggunakan one way anova dengan aplikasi SPSS versi 16. Hasil penelitian pada karakteristik film berbahan dasar kitosan-alginat dengan penambahan ekstrak daun kelor (Moringa oleifera L) dapat disimpulkan bahwa: Perlakuan Penambahan ekstrak pada konsentrasi 0%, 0,50%, 0,75, dan 1% berpengaruh secara signifikan terhadap nilai ketebalan film dan aktivitas antioksidan. Semakin tinggi konsentrasi ekstrak yang ditambahkan maka ketebalan dan peresentase aktivitas antioksidan mengalami peningkatan. Sedangkan penambahan ekstrak pada konsentrasi 0%, 0,50%, 0,75, dan 1% tidak berpengaruh terhadap nilai kuat tarik, elongasi serta kelarutan film kitosan alginat.   The primary objective of this study was to investigate the impact of adding moringa leaf extract on the physical, mechanical, and antioxidant properties of chitosan-alginate films. The type of research employed in this study is experimental research (true experiment), and the approach used is quantitative. The research design used in this study was a non-factorial completely randomized design (CRD) with three repetitions. The factors studied were the concentrations of Moringa leaf extract, the concentrations of Moringa leaf extract (E) used included: E1=0.5%, E2=0.75%, E3=1%. The values obtained were then analyzed using one-way ANOVA with the application of SPSS version 16. The results of research on the characteristics of films made from chitosan-alginate with the addition of Moringa oleifera L extract can be concluded that: Treatment Addition of the extract at a concentration of 0%, 0.50 %, 0.75%, and 1% had a significant effect on the value of film thickness and antioxidant activity. The higher the concentration of the extract added, the thickness and percentage of antioxidant activity increased. While the addition of the extract at concentrations of 0%, 0.50%, 0.75%, and 1% had no effect on the tensile strength, elongation, and solubility of the chitosan alginate film.
OPTIMIZATION OF LACCASE IMMOBILIZATION ON CHITOSAN BEADS USING THE CROSS-LINKING METHOD Kanto, Dhini Annisa Rahmasari; Ai Fifih Lutfiah; Sopia Nurjihan
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.11828

Abstract

Limbah industri tekstil merupakan salah satu masalah utama lingkungan saat ini. Limbah tersebut mengandung residu pewarna dan berbagai senyawa kompleks. Lakase menjadi salah satu pilihan untuk degradasi biokatalitik zat warna karena biodegradabilitas dan biokompatibilitasnya. Pemanfaatan lakase untuk detoksifikasi polutan secara luas menjadi terbatas karena kerentanannya terhadap perubahan kondisi operasional. Untuk mengatasi masalah tersebut, lakase diimobilisasi pada kitosan dengan glutaraldehida sebagai agen pengikat silang. Penelitian ini dilakukan untuk menentukan kondisi optimum metode ikat silang dan imobilisasi lakase pada manik-manik kitosan. Pada penelitian ini, lakase dari Aspergillus sp. diimobilisasi pada butiran kitosan yang berikatan silang dengan glutaraldehida. Butiran kitosan dibuat dengan menggunakan kitosan 2% (b/v) dan diikat silang dengan glutaraldehida. Selanjutnya, butiran yang sudah teraktivasi glutaraldehida diinkubasi dengan lakase. Lakase yang terimobilisasi pada butiran kitosan diuji kadar protein dan aktivitasnya untuk memperoleh nilai efisiensi imobilisasi. Hasil penelitian menunjukkan bahwa konsentrasi glutaraldehida optimum adalah 0,8% dengan waktu ikat silang selama 6 jam, dosis lakase 0,4 mg/mL dan waktu imobilisasi selama 4 jam. Dari kondisi ini, didapatkan efisiensi imobilisasi sebesar 16,51% dengan aktivitas lakase sebesar 24,58 U/g. Berdasarkan karakterisasi gugus fungsi manik-manik kitosan terimobilisasi lakase, adanya puncak untuk gugus fungsi C=N mengkonfirmasi bahwa lakase telah terimobilisasi pada kitosan secara kovalen.   The textile industry is one of the significant environmental problems. The waste contains dye residues and various complex compounds. Laccase is a viable option for biocatalytic degradation due to its biodegradability and biocompatibility. The widespread use of laccase for pollutant detoxification is limited due to its susceptibility to changes in operational conditions. To overcome this problem, laccase was immobilized on chitosan with glutaraldehyde as a cross-linking agent. This research was conducted to determine the optimum conditions for the cross-linking method and laccase immobilization on chitosan beads. In this study, chitosan beads were developed using 2% (w/v) chitosan and cross-linked with glutaraldehyde. The activated chitosan beads were then incubated with laccase. The immobilized laccase was tested for its protein content and activity to obtain an immobilization efficiency value. The results showed that the optimum glutaraldehyde concentration was 0.8% with a cross-linking time of 6 hours, a laccase dose of 0,4 mg/mL, and an immobilization time of 4 hours. From these conditions, an immobilization efficiency of 16.51% was obtained with an enzyme activity of 24.58 U/g. Based on the functional group characterization of laccase-immobilized chitosan beads, the presence of the C=N functional group peak confirmed that laccase had been covalently immobilized on chitosan.
EFFECT RATIO OF RAW MATERIALS AND SOLVENTS EXTRACTION OF AVOCADO SEED (PERSEA AMERICANA) FOR NATURAL PESTICIDES Amborowati, Cindi; Siti Syamsiyah; Wahyu Fahrul Rozy
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.12685

Abstract

Hingga saat ini serangga pengganggu tanaman masih menjadi tantangan dalam semua jenis pertanian. Pestisida alami adalah bahan alam yang dapat digunakan untuk mengendalikan hama tersebut. Salah satu bahan alam yang bisa dimanfaatkan adalah ekstrak biji alpukat. Biji alpukat mengandung senyawa metabolit sekunder seperti flavonoid, fenolik, tanin, dan saponin yang dapat berfungsi sebagai racun pada sistem pencernaan serangga. Penelitian ini bertujuan untuk mengetahui pengaruh rasio volume pelarut tehadap masa bahan baku yang digunakan dalam proses ekstraksi biji alpukat. Pada penelitian ini bahan baku yang digunakan adalah 30 gram dengan variasi rasio volume pelarut dan massa bahan baku sebesar (1:25), (1:30), (1:35), (1:40), dan (1:45). Pestisida nabati yang dihasilkan diuji efektivitasnya menggunakan LD50 terhadap kematian jangkrik. Pada penelitian ini diperoleh hasil uji skrining fitokimia yang dilakukan pada setiap variasi volume massa bahan baku mengidentifikasi adanya senyawa alkaloid, fenolik tanin, dan saponin. Hasil analisa toksisitas LD50 terendah pada rasio volume pelarut dan bahan baku (1:40) dan (1:45) yaitu 707,9 mg/kgBB dengan tingkat toksisitas kategori sedang.   Until now, plant pests have been a challenge in all types of agriculture. Natural pesticides are natural ingredients that can be used to control these pests. One natural ingredient that can be used is avocado seed extract. Avocado seeds contain secondary metabolite compounds such as flavonoids, phenolics, tannins, and saponins, which can function as toxins in the digestive system of insects. This research aims to determine the effect of the solvent volume ratio on the mass of the raw material used in the avocado seed extraction process. In this study, the raw material used was 30 grams with varying ratios of solvent volume and raw material mass, specifically (1:25), (1:30), (1:35), (1:40), and (1:45). The resulting botanical pesticide was tested for effectiveness using the LD50 against cricket mortality. In this study, the results of phytochemical screening tests carried out on each variation in mass volume of raw materials identified the presence of alkaloids, phenolic tannins, and saponins. The lowest LD50 toxicity analysis results were in the solvent and raw material volume ratio (1:40) and (1:45), namely 707.9 mg/kgBW with a medium category toxicity level.
THE RELATIONSHIP BETWEEN STUDENTS’ CONCEPTIONS OF CHEMISTRY AND LABORATORY PERFORMANCE: AN ANALYSIS OF SCIENCE PROCESS SKILLS Pamenang, Fransisca Ditawati Nur Pamenang; Ratri, Monica Cahyaning Ratri
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 7 No. 1 (2025): January - June 2025
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v7i1.12831

Abstract

Penelitian ini menyelidiki hubungan antara pemahaman konsep kimia mahasiswa dan kinerja mereka dalam eksperimen laboratorium, dengan fokus pada keterampilan berpikir tingkat tinggi (HOTS) seperti analisis, evaluasi, dan kreasi. Penguasaan konsep diukur melalui lima soal esai dengan skala rubrik, dan validitas butir tes diperiksa menggunakan Corrected Item-Total Correlation, di mana semua butir dinyatakan valid. Analisis data menggunakan korelasi Pearson menunjukkan korelasi positif yang cukup kuat (r = 0,612, p = 0,005) antara pemahaman konsep dan kinerja laboratorium. Penelitian ini juga mengungkap bahwa pemahaman konsep meningkatkan keterampilan proses sains seperti pengamatan, interpretasi data, klasifikasi, komunikasi, dan perumusan hipotesis. Temuan ini menyarankan bahwa pembelajaran berbasis konsep dan interaktif dapat meningkatkan kinerja laboratorium mahasiswa, dengan implikasi pedagogis bagi pendidik untuk memprioritaskan integrasi teori dan praktik dalam pengajaran kimia.   This study examines the relationship between students' understanding of chemical concepts and their performance in laboratory experiments, with a focus on higher-order thinking skills (HOTS), including analysis, evaluation, and creation. Concept mastery was assessed through five essay questions using a rubric scale, and the validity of the test items was examined using the Corrected Item-Total Correlation, with all items deemed valid. Data analysis using Pearson correlation revealed a moderately strong positive correlation (r = 0.612, p = 0.005) between concept understanding and laboratory performance. The study also found that concept mastery enhances students' integrated science process skills, such as observation, data interpretation, classification, communication, and hypothesis formulation. These findings suggest that concept-based and interactive learning can improve students' laboratory performance, with pedagogical implications for educators to prioritize the integration of theory and practice in chemistry instruction.

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