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All Journal Jurnal Matematika & Sains Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) Journal of Mathematical and Fundamental Sciences Jurnal Pendidikan Kimia Universitas Riau Jurnal Tadris Kimiya JOURNAL OF SCIENCE AND SOCIAL RESEARCH Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran Ensiklopedia: Jurnal Pendidikan dan Inovasi Pembelajaran Saburai Educenter: Jurnal Ilmiah Pendidikan Jurnal Sains dan Teknologi Makara Journal of Science EDUCENTER JURNAL PENDIDIKAN Journal of Humanities Education Management Accounting and Transportation
Iis Siti Jahro
Universitas Negeri Medan
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Veterinary Other

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Improving Students’ HOTs-Literacy Abilities Through Making Summaries at The End of Learning Iis Siti Jahro; Ani Sutiani; Suryani Suryani; Asep Wahyu Nugraha
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 6, No 1 (2024): APRIL 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i1.57484

Abstract

The reading and writing habits of SMAN 2 Percut Sei Tuan students are relatively low. Therefore, students' literacy and high order thinking abilities are also relatively low. The implementation of scientific literacy-based learning strategies in the form of making summaries at the end of the learning process is expected to improve students' literacy and high order thinking skills. The instruments used are tests in the form of varied multiple choices and essays totaling 8 and 2 questions. The results of data analysis show that students' initial abilities on the 9 of HOTs-Literacy indicators are very low with an average value of 28.49. The summarizing treatment at the end of the learning process succeeded in improving the ability of HOTs-Literacy students in indicators (1) identifying information and data, (2) using information and data, (3) producing explanatory models, (4) distinguishing questions that can be researched scientifically, (5) formulating hypotheses, (6) making predictions, (7) analyzing data, (8) interpreting data, (9) drawing or presenting conclusions, respectively 63.7 ; 66.7; 68.4 ; 64.0 ; 70.9 ; 70.8; 79.2 ; 81.4 and 86.3 %.
CRYSTAL STRUCTURE OF [Bis(DIMETHYLFORMAMIDE) Bis(2,2’-PYRIDYL)QUINOLINE)IRON(II)]Bis-(TETRAPHENYLBORATE) Jahro, Iis Siti; Onggo, Djulia; Ismunandar, Ismunandar; Rahayu, Susanto Imam; Yamin, Bohari M.
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The goal of this research is to obtain single crystal and structural information of iron(II) complex with 2,(2’- pyridyl)quinoline(pq) ligands. The reaction of iron(II) salt with 2,(2’-pyridyl)quinoline ligand and sodium tetraphenylborate in the molar ratio of 1:3:2 in methanol-N,N-dimethylformamide(dmf) solution results in an iron(II) complex. The formula of the [Fe(pq)2(dmf)2](BPh4)2 complex has been obtained from the iron(II) and C, H, N contents. Single crystal of [Fe(pq)2(dmf)2](BPh4)2 suitable for X-ray investigation was obtained by evaporation of the complex solution in N,N-dimethylformamide at room temperature after 24 hours. This compound crystallizes in monoclinic system with C2/c space group, a = 27.950(4), b = 14.169(7), c = 17.717(9) Å and β = 105.669(11)°. The structure consist of iron(II) is chelated by two pq ligands through the N atoms and two dmf molecules in a six-coordination environment. The charge of the [Fe(pq)2(dmf)2] 2+ cation is balanced by two tetraphenylborate (BPh4) - anions.
The development of interactive multimedia based lectora inspire on chemical bonding material for grade X senior high school Putri Yustika Sary; Iis Siti Jahro
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 9 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i9.109

Abstract

This research aims to determine to develop interactive multimedia based on the Lectora Inspire on chemical bonding for grade X Senior High School an, knowing the feasibility of developing interactive multimedia based on the Lectora Inspire on chemical bonding materials in accordance with the BSNP form assessment criteria. The type of research is (R&D) by implementing 4-D development model by Thiagarajan. The stages are define, design, develop, and disseminate. The results of media validation of the 3 validators showed that the product was included in the "Very Feasible" category because the average percentage of validation results from 3 validators was above 90%, namely 95.33%; 91.7% and 100%. The results of material validation of the 3 validators showed that the material was included in the "Very Feasible" category because the average percentage of validation results from 3 validators was above 95%, namely 97%; 97% and 95.7%. From the result, it can be conclude that the Interactive Multimedia Based Lectora Inspire on Chemical Bonding Material for Grade X Senior High School is appropriate to implement for teaching and learning process.
The development of interactive multimedia based lectora inspire on chemical bonding material for grade X senior high school Sary, Putri Yustika; Iis Siti Jahro
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 9 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i9.109

Abstract

This research aims to determine to develop interactive multimedia based on the Lectora Inspire on chemical bonding for grade X Senior High School an, knowing the feasibility of developing interactive multimedia based on the Lectora Inspire on chemical bonding materials in accordance with the BSNP form assessment criteria. The type of research is (R&D) by implementing 4-D development model by Thiagarajan. The stages are define, design, develop, and disseminate. The results of media validation of the 3 validators showed that the product was included in the "Very Feasible" category because the average percentage of validation results from 3 validators was above 90%, namely 95.33%; 91.7% and 100%. The results of material validation of the 3 validators showed that the material was included in the "Very Feasible" category because the average percentage of validation results from 3 validators was above 95%, namely 97%; 97% and 95.7%. From the result, it can be conclude that the Interactive Multimedia Based Lectora Inspire on Chemical Bonding Material for Grade X Senior High School is appropriate to implement for teaching and learning process.
Differences in Learning Outcomes and Science Process Skills of Students Learned with the Model Project Based Learning and Discovery Learning on Acid-Base Material Sembiring, Niki Arih Ersada Br; Jahro, Iis Siti
Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran Vol 9, No 2 (2024): April
Publisher : UNDIKMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jtp.v9i2.11245

Abstract

The purpose of this study is to determine the differences in learning outcomes and science process skills of students learned with Project Based Learning and Discovery Learning models on acid-base material, as well as the correlation between students' science process skills and student learning outcomes. This research is a quantitative research. The samples in this study were taken by random sampling of 2 classes, namely XI MIPA 1 as experimental class I and XI MIPA 3 as experimental class II, where each class was taken by 29 students based on the similarity of pretest results. The instruments used are test instruments in the form of multiple-choice questions and essays and non-test instruments in the form of observation sheets. Hypothesis testing was carried out using the SPSS Statistic version 24 for Windows computer program using the Independent Sample T-Test and Bivariate Pearson Correlation. For hypothesis I obtained the value of sig. (2-tailed) 0.008   (0.05) so that Ha is accepted, which means that there are differences in student learning outcomes learned with Project Based Learning and Discovery Learning models on acid-base material. For hypothesis II obtained sig value. (2-tailed) 0.010   (0.05) so that Ha is accepted, which means that there are differences in students' science process skills learned with the Project Based Learning and Discovery Learning models on acid-base material. For hypotheses III and IV obtained sig values. (2-tailed) of 0.002 and 0.001  (0.05) so that Ha is accepted, which means that there is a correlation between students' science process skills and student learning outcomes learned with Project Based Learning and Discovery Learning models on acid-base material.
Synthesis and Characterization of Hexathiosianatoiron(II) [Fe(NCS)6] 4- Complex Compound and Tetrapyridindithiosianatoiron(II) [Fe(NCS)2(Py)4] Complex Compound Febrianti, Fitria; Sutiani, Ani; Jahro, Iis Siti; Nugraha, Asep Wahyu; Fadhila, Nabila Nur
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.56440

Abstract

This research aims to synthesize and characterize the complex compounds Hexathiocyanatoiron(II) [Fe(NCS)6] 4- and Tetrapyridinedithiocyanatoiron(II) [Fe(NCS)2(Py)4]. The synthesis of these complex compounds was conducted in the Chemistry Laboratory, Faculty of Mathematics and Natural Sciences, Medan State University, while magnetic susceptibility measurements were carried out using the Magnetic Susceptibility Balance (MSB) instrument in the Inorganic Chemistry Laboratory, Bandung Institute of Technology. The complex compound synthesis involved the reaction of Iron(II) sulfate heptahydrate with Potassium thiocyanate and Pyridine compound in a 1:2 and 1:2:4 molar ratio. The synthesis process was conducted through a direct reaction method in a polar solvent. The obtained results include Hexathiocyanatoiron(II) complex compound, [Fe(NCS)6] 4-, which is pale yellow crystalline with a yield of 32.76%, and Tetrapyridinedithiocyanatoiron(II) complex compound, [Fe(NCS)2(Py)4] which is dark purple crystalline with a yield of 52.62%. These compounds exhibit a melting point of 219℃. Magnetic susceptibility measurements using the MSB instrument revealed a magnetic susceptibility of 6.69 BM (paramagnetic) for the Hexathiocyanatoiron(II) complex[Fe(NCS)6] 4-, and a magnetic moment of 5.61 BM (diamagnetic) for the Tetrapyridinedithiocyanatoiron(II ) complex [Fe(NCS)2(Py)4].
Synthesis of Zeolite from Rice Husk Ash Through Hydrothermal Process in Alkaline Condition Jahro, Iis Siti; Nursanni, Banu; Nugraha, Asep Wahyu; Juwitaningsih, Tita; Cindy, Cindy; Amalia, Meisya
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 2 (2024): JULY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i2.62257

Abstract

People consider rice husks as agricultural waste. In Deliserdang Regency, in one year's period, 12,600 tons of ash are collected from the burning of around 70,000 tons of rice husk. The synthesis of zeolite from ash of rice husks was carried out by starting process of forming sodium silicate and aluminate compounds through the reaction with Al2O3 and NaOH in water on the room temperature for 10 hours. The results of reaction is refluxed at 70 C for 3 hours. After being stored for around 12 hours at room temperature, the reflux process was continued at 120 C for 8 hours. Infrared spectra of zeolite show an infrared absorption band in the area of around 440; 606; 745; and 1007 cm-1 which is the typical infrared absorption of zeolite X. This is supported by the XRD diffractogram with the diffraction peaks at 2 degree of 12.34; 17.51; 21.53; 27.90; 28.50 and 33.22 degrees.
Analysis of Students' Scientific Literacy Ability in Solving HOTS-Based Chemistry Questions Debora Putri Sitorus; Iis Siti Jahro
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 6, No 2 (2024): OCTOBER 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i2.60730

Abstract

Students' scientific literacy abilities are relatively low; apart from that, students are not yet accustomed to solving HOTS-based chemistry science literacy questions, especially in content, context, and science competency. This research aims to analyze the distribution of students' scientific literacy abilities in content, context, and competency. The instruments used are reasoned multiple-choice tests and essays. This research used quantitative descriptive research with a sample of all class XI Science students at SMA Negeri 2 Percut Sei Tuan for the 2023/2024 academic year. The results of data analysis show that the distribution of students' scientific literacy abilities in the content aspect is 71.33% in the content domain in the medium category, the procedural domain 57.11%, and the epistemic domain 56.99% in the low category. The distribution in the context aspect of the health domain was 66.08% in the medium category; the natural resources domain is 48.25%, and the environmental domain is 42.66%, which is in the deficient category. Moreover, the distribution in the domain competency aspect of explaining scientific phenomena is 55.13% in the low category; the domain of evaluating and designing investigations is 44.64%, and the domain of interpreting data and evidence scientifically is 46.68% in the deficient category.
Analysis of Students Problem Solving Abilities Using Contextual Learning on Colloid Material at SMAS Pertiwi Annisa Rahayu; Iis Siti Jahro
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 6, No 2 (2024): OCTOBER 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i2.60891

Abstract

Many students do not have good problem solving skills in solving problems in everyday life, especially in chemistry learning.  Therefore, analysis of students' problem solving abilities is needed to determine the level of problem solving abilities in chemistry learning, especially in colloidal systems material in everyday life. The purpose of this study is to describe how students use cooperative learning, specifically contextual learning, to solve problems. The goals of this study will be accomplished since the data collected will take the shape of words or utterances derived from the outcomes of interviews and Polya's problem-solving abilities. The use of this innovative learning media is supported by a contextual learning model. The type of research used in this study is qualitative research with a descriptive approach. This research procedure includes: (1) preparation stage; (2) implementation stage and (3) Final Stage. The problem solving ability of class XI students of SMAS Pertiwi Medan is at the "very good" level with a total of 24 students and a percentage of 39% of the total 62 students. The difficulty in answering problem solving ability test questions that students often experience is not understanding the story content of the test questions given.
Analisis Kelarutan Senyawa Kovalen Polar dan Non Polar Menggunakan Air Beras, Minyak dan Kertas Litmus Sebagai Indikator Veronika, Christy Chirona; Siregar, Eka Guspi Anti; Tama, Gita Citra; Manik, Inda Wati; Izwani, Putri Khairi; Jahro, Iis Siti
Journal of Humanities Education Management Accounting and Transportation Vol 2, No 1 (2025): Februari 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/hemat.v2i1.4499

Abstract

Percobaan ini bertujuan untuk menguji sifat  senyawa kovalen polar dan non polar dalam larutan yang berasal dari sumber daya alam, dengan menggunakan air beras, minyak, dan kertas litmus sebagai bahan uji. Masalah utama yang ditemukan adalah bagaimana sifat kelarutan dan senyawa polar dan non polar dapat terjadi ketika dalam pengujian. Metode yang digunakan meliputi uji kelarutan senyawa polar pada air beras, uji senyawa non polar minyak, serta pengujian menggunakan kertas litmus. Hasil penelitian menunjukkan bahwa senyawa kovalen polar lebih mudah larut dalam air beras dan sedikit mempengaruhi warna kertas litmus, sedangkan senyawa non polar lebih larut dalam minyak dan tidak menunjukkan perubahan pada kertas litmus. Kesimpulan dari percobaan ini adalah bahwa senyawa kovalen polar dan non polar memiliki sifat kelarutan yang berbeda tergantung pada jenis pelarut yang digunakan.
Co-Authors Adelia Yesya Putri Hasibuan Amalia, Meisya Ani Sutiani Anisa Nursalsabillah Nasution Annisa Rahayu Annisa Rahayu Ardiansyah Ardiansyah Asep Wahyu Nugraha Asep Wahyu Nugraha Ayi Darmana Ayi Darmana Ayi Darmana, Ayi Bohari M. Yamin Bohari M. Yamin Br Bangun, Kurnia Wati Catur Kurniawan CINDY CINDY Debora Putri Sitorus Debora Putri Sitorus Djulia Onggo Djulia Onggo Djulia Onggo Esther Jacoba Martha Vertelman Fadhila, Nabila Nur Fahimah Martak Fitria Febrianti, Fitria Hutagaol, Rahul Intan Ayu Safitri Intan Fahira Yuzan Ismunandar Ismunandar . Ismunandar Ismu Izwani, Putri Khairi Jasmidi Jasmidi Juwitaningsih, Tita Khuzaimah Dasopang MANIK, INDA WATI Meli Sartika Silaban Nursanni, Banu Petra van Koningsbruggen Putri Yustika Sary Ratu Evina Dibyantini Sary, Putri Yustika Sembiring, Niki Arih Ersada Br Sembiring, Silvia Gressiela Br Siregar, Eka Guspi Anti Suryani Suryani Suryani Suryani Susanto Imam Rahayu Susanto Imam Rahayu Sutiani, Ani Tama, Gita Citra Veronika, Christy Chirona