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Jurnal Akademika Kimia
Published by Universitas Tadulako
ISSN : 24775185     EISSN : 23026030     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Akademika Kimia is an electronic open-access journal that aims to publish the latest research results in the area of chemistry education and pure chemistry from academicians, professionals, and other practitioners at all levels of chemistry education. The journal coverage includes the following: current trends of professional chemistry education, educational technology, teacher education, educational science, learning assessment, learning models and development of learning materials, as well as pure chemistry including organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry and other chemistry fields such as environmental chemistry, that emphasis on a broad description of the general methods and processes for the synthesis, modification, and characterization of chemical materials.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 258 Documents
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Android Based E-Module Development Integrated Virtual Laboratory in Learning Chemistry of Electrochemical Cell Materials Ni Made Putri Savitri; Daud K. Walanda; Mery Napitupulu; Detris Poba
Jurnal Akademika Kimia Vol. 13 No. 2 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i2.pp40-50

Abstract

Chemistry education students experience misconceptions in studying electrochemical material, especially voltaic cells and electrolytic cells, because most of it is abstract. Most students understand electrochemical material only from the macroscopic aspect, so students' understanding of electrochemical cells is relatively low; therefore, it is necessary to use the right media to help overcome misconceptions when studying electrochemical material. This research aims to develop an Android-based e-module integrated with a virtual laboratory on electrochemical cell material produced as a chemistry learning medium. This research is research and development using the ADDIE model with stages, namely analysis, design, development, implementation, and evaluation. Validation of the Android-based e-module integrated with a virtual laboratory was carried out by two UNTAD chemistry education lecturers and implemented by trial on 20 chemistry education students in semesters 1 and 5. The conclusion of this research shows that the Android-based e-module integrated in the virtual laboratory is valid and feasible to use as a learning medium to overcome misconceptions experienced by chemistry education students when studying electrochemistry, as shown by the results of material validation and media validation, which were declared very valid with a value of 85.19% and 83.33%, and product trial results with a value of 81.86%, which is included in the very feasible category.
Determination of Fe(III) Concentration by UV-Vis Spectrophotometry Using Flamboyant Flower Extract as a Complexing Agent Fahril Fahril; Sitti Aminah; Tri Santoso; Purnama Ningsih; Nur Indah
Jurnal Akademika Kimia Vol. 15 No. 2 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i2.pp159-166

Abstract

Aquatic environments contaminated with iron can pose a threat to human health and other organisms, with a threshold concentration of 0.2 mg/L for hygiene and sanitation purposes. This study aims to analyze Fe(III) concentrations in water using UV-Vis spectrophotometry with a natural complexing agent from flamboyant flower extract as a more economical and environmentally friendly alternative to KSCN. Flamboyant flower extract contains anthocyanin compounds with a density of 1.02 g/cm³ that form a red-colored complex with Fe(III) and exhibit maximum absorption at a wavelength of 510 nm. Optimal complex formation conditions were achieved at pH 1 with an extract volume of 0.15 mL and a reaction time of at least 40 minutes. The complex was found to be stable for 2 days. Analysis results showed that the Fe(III) concentration in the tested water sample was 1.09 mg/L.
The Effect of the PBL Model on Science Process Skills and Science Learning Outcomes of Students Abdur Rahman; Tahril Tahril; Purnama Ningsih
Jurnal Akademika Kimia Vol. 13 No. 3 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i3.pp93-101

Abstract

This study aims to determine the effect of the project-based learning model application on science process skills and students' science learning outcomes. This type of research is a quasi-experimental using a counterbalanced design with a Post-test Only Control Design research, which was carried out in two research sessions. The study population was all students of SMP Negeri 21 Bulubonggu. The sampling technique was purposive. In the first session, the science process skills scores of the experimental class 1 students were 56.40, the experimental class 2 students were 37.95, while the experimental class 1 students' learning outcomes were 70.00, and the experimental class 2's average was 54.50. The results of the independent-sample parametric t-test of science process skills were obtained, p = 0.001, and the learning outcomes obtained were p = 0.000, so that H0 was rejected. The second session of the science process skills scores of the experimental class 1 students obtained an average of 60.60, the experimental class 2 was 72.80, and the learning outcomes of the experimental class 1 students were an average of 62.00, the experimental class 2 was 74, 00. The results of the independent-sample parametric t-test for science process skills were obtained, p = 0.043; the learning outcomes obtained were p = 0.042, so that Ho was rejected. It means that (1) there is an effect of the project-based learning model on students' science process skills, and (2) there is an effect of the project-based learning model on student learning outcomes.
The Basic Chemistry Knowledge Effect on Students’ Achievement Through the Pathways in Tadulako University Suheria Suheria; Sitti Nuryanti; Afadil Afadil
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp108-112

Abstract

This research aimed to analyse the influence of basic chemistry on the achievement (IP) of chemistry students (PSPK) at Tadulako University. The population of this research comprised all students of PSPK FKIP Tadulako University in the 2018/2019 academic year, totaling 464 students. The sampling technique used a stratified sample. The sample of this research was 115 students. The data for this research were obtained from the BAKP Tadulako University Archive, Tadulako University, and a questionnaire. The result of this research shows that basic chemistry has a positive influence on PSPK students’ IP through SNMPTN, with a coefficient of 0.032, a regression equation b = 3.281, t(23) = 0.067, and p < .692. through  SBMPTN by  0.877 with the equation regression b= 0.790, t(69) = 0.803, p > .000 and  SMMPTN by 0.843with the equation regression b=0.574, t(20) = 0.996, p > .000.
Nickel Extraction from Morowali Laterite Ore with Combination of Sulfuric Acid (H2SO4) and Nitric Acid (HNO3) Mujahida Mustari; Daud K. Walanda; Mery Napitupulu; Sri H. V. Pulukadang
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp113-117

Abstract

Nickel is a very important metal. The nickel reserves in Indonesia are very large, but there is no dedicated process that uses only nickel ore as a raw material. The process of separating nickel from impurities is carried out by leaching with a sulfuric acid-nitric acid solution. The research design was developed using the Taguchi Larger-the-Better method to optimize nickel extraction. In the leaching stage, nickel is extracted from the ore by dissolving it in an acid medium. The variables examined in this study were the mixture ratio, temperature, and leaching time. The extracted filtrate was analyzed using Atomic Absorption Spectrophotometry (AAS). The results of the Taguchi analysis showed that the optimal conditions for the leaching process were obtained with a mixture ratio of 2:1, a temperature of 60 °C, and a leaching time of 12 hours, yielding a concentration of 10.559 ppm and a recovery of 2.49%.
Implementation of Locally Oriented PBL Devices on The Other Reaction to the Students' Critical Thinking Ability Jenny I. Laroni; Afadil Afadil; Paulus H. Abram
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp125-132

Abstract

This study aims to determine the validity, practicality, and effectiveness of the application of problem-based learning tools with local wisdom-oriented material on the rate of reaction to the critical thinking skills of students of SMAN 1 Pamona Utara. The research design used a one-group pretest-posttest design. The population of all class XI MIPA students at SMAN 1 Pamona Utara. The research sample consisted of 54 people, comprising 27 class XI MIPA 1 students and 27 class XI MIPA 2 students, with the two classes serving as the experimental classes. Experts carried out the validation of learning tools, and the score of each validity item of the research instrument in the form of lesson plans and worksheets, calculated according to a Likert scale, was 74.10%, indicating that the lesson plans and worksheets were declared valid and fit for use based on validity by the validator. For the practicality assessment instrument, the implementation of the RPP Problem-Based Learning has been carried out well, resulting in a score of 91.3%, which falls in the very high category. In contrast, the assessment instrument for the effectiveness of critical thinking skills is very high, which is divided into Interpretation, Evaluation, and Analysis, namely, class XI MIPA 1 scored 93%, 96.25%, and 96.5%, and class XI MIPA 2 had scores of 95%, 95.50%, and 96.5%. The value of student learning outcomes is evident in the N-gain values for both classes XI MIPA 1 and 2, which are 0.76 and 0.74, respectively, placing them in the high category. In LKPD based on local cultural wisdom, students are expected to improve their conceptual understanding of the subject matter.  
Correlation of Students' Questioning Skills Profile and Critical Thinking Ability on Science Subject Using Inquiry Model Suriyani Suriyani; Tri Santoso; Sitti Rahmawati
Jurnal Akademika Kimia Vol. 13 No. 4 (2024)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2024.v13.i4.pp118-124

Abstract

This study aims to describe the profile of the questioning skills of grade 5 students of SDN Inpres I Lasoani in science subjects after the inquiry learning model was applied. Moreover, to describe the correlation between students' questioning skill profiles and critical thinking ability at the application and analysis levels. This research is a mixed method (Mixed Methods), which is a research approach that combines quantitative and qualitative forms. The population in this study was the 5th-grade students of SD Inpres I Lasoani, Mantikulure District, East Palu, totaling  41 students. The researcher used the purposive sampling technique to select the subjects; they are 12 students selected as a sample, with the level of science learning ability categorized into 3 groups: high, medium, and low. Data collection techniques are observation, posttest, and documentation. The data in this study are qualitative, consisting of percentages derived from observations. The students' questioning skills get a score of 43.33 and are included in the medium category. In contrast, critical thinking skills with inquiry learning were 62.71% at the medium N-gain level in the high cognitive group, and 50.11% at the medium N-gain level in the moderate cognitive group. The low cognitive group obtained 46.22% at the N level. -medium gain. Thus, the improvement in the critical thinking skills of SD 5 Lasoani students after participating in inquiry learning was in the medium category. There is a positive correlation between the ability to ask questions and critical thinking.
Evaluation of Students’ Collaboration Skills Through Practicum-Based Learning Heri Setiawan; Mizwar Mizwar; Mellyatul Aini; Wilce A. C. Kuendo; Ester C. Wowor
Jurnal Akademika Kimia Vol. 15 No. 3 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i3.pp167-174

Abstract

These skills are very important for science education students, especially in carrying out practicum activities. The sample used in this study consisted of 12 science education students in their early semester. The method used in this study is quantitative descriptive. Data in the study were obtained directly from the research subjects. This study used a rubric to assess collaboration skills, with scores ranging from 1 to 4. The research instruments have been validated by five Science Education lecturers and are deemed feasible for measuring students' collaboration skills. The research results, based on the indicators of Contribution, Problem Solving, Working with Others, Time Management, and Investigation Techniques, showed average scores of 3.75, 3.33, 4.00, and 3.50, with all indicators falling into the very good category, while the overall average score was 3.67. The data show that the collaboration skills of science education students during laboratory sessions are very good. The results of this study indicate that collaboration skills play an important role in supporting the success of the learning process. Based on these findings, it can be concluded that early-semester science education students already have very good collaboration skills during practicum activities, as reflected in high achievement across all measured indicators. Therefore, these findings have significant implications both theoretically and practically in the field of education.

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