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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 Jurnal Pendidikan Kimia (JPKim) JOURNAL OF SCIENCE AND SOCIAL RESEARCH Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Hydrogen: Jurnal Kependidikan Kimia Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Ensiklopedia: Jurnal Pendidikan dan Inovasi Pembelajaran Saburai Educenter: Jurnal Ilmiah Pendidikan Jurnal Sains dan Teknologi Makara Journal of Science Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA) Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Jurnal Sains dan Ilmu Terapan EDUCENTER JURNAL PENDIDIKAN Journal of Humanities Education Management Accounting and Transportation Indonesian Journal of Jamu
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 Environmental Science Health Professions Immunology & microbiology 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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Synthesis and Magnetic Properties of a Fe-Mn-Cr Multinuclear Complex with 4-Amino-1,2,4-triazole and Oxalate Ligands Iis Siti Jahro; Djulia Onggo; Ismunandar Ismunandar; Susanto Imam Rahayu; Esther Jacoba Martha Vertelman; Petra van Koningsbruggen
Jurnal Matematika & Sains Vol 11, No 3 (2006)
Publisher : Institut Teknologi Bandung

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

Abstract

A multinuclear Fe-Mn-Cr complex with 4-amino-1,2,4-triazole (NH2trz) and oxalate (ox) ligands has been synthesized successfully. The formula of the [Fe(NH2trz)3][ClO4][MnCr(ox)3].4H2O complex has been obtained based on the metal and C, H, N contents. The presence of water molecules, metal-ligand bonding and bridge ligand in the multinuclear complex has been confirmed by its infrared spectrum. The compound crystallizes in the hexagonal system with cell parameters of a = b = 18.695 Å and c = 57.351 Å. The compound shows a gradual spin crossover for iron(II) in the [Fe(NH2trz)3]2+ with transition temperature (T1/2) of 205 K. The antiferromagnetic interaction between Cr(III) and Mn(II) ions in the [MnCr(ox)3]n n- network is observed from the Weiss constant (θ) of -2.3 K.
Identification of High School Students' Misconceptions on Chemical Bonding With Three Tier Test Ardiansyah Ardiansyah; Iis Siti Jahro; Ayi Darmana
Jurnal Pendidikan dan Pembelajaran Kimia Vol 10, No 3 (2021): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

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Abstract

Abstract: Identification of High School Students’ Misconceptions on Chemical Bonding With Three Tier Test. This study aims to determine misconceptions among high school students in Medan city on chemical bonding concepts. The research population was 10th grade senior high school students in Medan City, while the samples were taken from 3 schools (school A, B, and C) in Medan City with cluster random sampling technique, a total of 109 students. Three-Tier Test (TTT) were developed based on indicators that students must master in chemical bonding material. The questions are validated by expert validators so that valid questions are generated. A valid TTT is then given to a sample of students. Furthermore, interviews were conducted with students who experienced misconceptions. All data obtained through the test were processed and analyzed. Results showed students who have misconceptions in high school A, B, and C is 53,33, 41,74, and 54,58 respectively with an average of 48,98%. The misconception occurs largely in ionic bonding(56,58%). In addition, the misconception is also found in the stability elements (51,84%), Lewis symbol and structures (46,18%), and covalent bonding (47,48%)concept. The cause of misconceptions is largely due to the wrong students constructing concepts.Keywords: Misconception, Three-Tier Test, chemical bonding.  Abstrak: Identifikasi Miskonsepsi Siswa SMA pada Ikatan Kimia dengan Test Tiga Tingkat. Penelitian ini bertujuan untuk mengetahui miskonsepsi siswa SMA di Kota Medan pada materi ikatan kimia. Populasi penelitian adalah siswa SMA kelas X di kota Medan, sedangkan sampel diambil dari 3 SMA (SMA A, B, dan C) di kota Medan dengan teknik cluster random sampling, sebanyak 109 siswa. Tes Tiga Tingkat (TTT) dikembangkan berdasarkan indikator yang harus dikuasai oleh siswa pada materi ikatan kimia. Soal-soal divalidasi oleh validator ahli sehingga didapatkan soal yang valid. TTT diberikan kepada sampel siswa penelitian. Wawancara dilakukan kepada siswa yang mengalami miskonsepsi.  Semua data yang didapatkan, selanjutnya diproses dan dianalisis. Hasil penelitian menunjukkan siswa yang mengalami miskonsepsi di SMA A, B, dan C berturut-turut sebesar 53,33, 41,74, dan 54,58 dengan rerata 48,98%. Miskonsepsi sebagian besar terjadi pada konsep ikatan ion (56,58%). Selain itu, miskonsepsi juga ditemukan pada konsep kestabilan unsur (51,84%), lambang dan struktur lewis (46,18%), dan ikatan kovalen (47,48%). Sebagian besar miskonsepsi disebabkan oleh kesalahan siswa merekonstruksi konsep.  Kata kunci: Miskonsepsi, tes tiga tingkat, ikatan kimiaDOI: 10.23960/jppk. v10.i3.2021.17
Improving Students Science Process and Critical Thinking Skills Using Semi-Research Patterns Practicum Iis Siti Jahro; Ayi Darmana; Ani Sutiani
Jurnal Tadris Kimiya Vol 6, No 1 (2021)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v6i1.12495

Abstract

The old pattern of practicum implementation has less impact on increasing students’ science process skills and critical thinking. Therefore, implementing practicum with a semi-research pattern has been carried out by involving the lecturer and laboratory assistant. The subjects of this research were 40 students in Universitas Negeri Medan. The method is classroom action research consisting of two cycles. Each cycle includes planning, action, reflection, and evaluation. Instrument’s research is the observation sheet and essay test. The results of descriptive data analysis show that implementing practicum with a semi-research pattern can improve students’ science process critical thinking skills, especially in planning experiments by 88.3% and critical thinking skills in evaluating by 82.3%.  
Synthesis of Fe–Li–Cr Multinuclear Complexes as Molecular Magnet Materials Djulia Onggo; Iis Siti Jahro; Fahimah Martak; Ismunandar Ismu
Journal of Mathematical and Fundamental Sciences Vol. 40 No. 1 (2008)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2008.40.1.6

Abstract

Multinuclear complexes have received considerable interest as molecular magnet materials. Up to now, several complex compounds based on bidentate ligand 2,2' bipyridine have been synthesized. In this research, the Fe-Li-Cr multinuclear complexes with derivative 2'2- bipyridine ligands: 2-(2'-pyridyl)quinoline(pq), 2,2'-Pyridil(pdl) have been synthesized. The oxalate (ox) ligand has also been used as a bridging ligand in these multinuclear complexes. The chemical formula of Li[FeCr(ox)2(pq)(BF4)2(H2O)2] and [Fe(pdl)n][LiCr(ox)3] complexes have been verified using metal and C, H, N elemental analysis data. The IR spectra in 350 "“ 4000 cm-1 range exhibit characteristic absorptions, which support the proposed structure of complex. The plausible structure of the compounds has been drawn based on complex formation mechanism. The magnetic susceptibility at room temperature of the pq-complex is about 5.7 BM and of the pdl- complexes are 4.8 and 5.5 BM. These indicated that both spin states of iron(II) exist in the multinuclear complexes.
Synthesis and Characterization of Zeolite X from Boiler Ash and Aluminum Foil Waste Intan Ayu Safitri; Iis Siti Jahro
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 4, No 1 (2021): JANUARY 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v4i1.23090

Abstract

This study aims to determine the effect of the Si/Al molar ratio and the number of Na2EDTA additions on the purity and crystallinity levels of the synthesized zeolite X. zeolite X was synthesized by hydrothermal method at 70°C and 120°C for 3 and 6 hours, respectively. In the synthesis of zeolite X used boiler ash and aluminum foil waste. The results of characterization using Fourier Transform Infra Red (FT-IR) and X-Ray Diffraction (XRD) showed that the level of purity and crystallinity of the synthesized zeolite X was influenced by the variation of Si/Al molar rasio and amount of Na2EDTA addition. The zeolite with the best quality was obtained from the synthesis with a Si/Al molar ratio of 1.6 and the amount of Na2EDTA added as much as 3.0 g. The synthesized zeolite X has a purity level of 75% and a degree of crystallinity with a total intensity of 845.
Pengembangan e-LKPD Berbasis Inkuiri Terbimbing pada Pokok Bahasan Ikatan Kimia untuk Mengukur Kemampuan Berpikir Kritis Siswa Intan Fahira Yuzan; Iis Siti Jahro
Ensiklopedia: Jurnal Pendidikan dan Inovasi Pembelajaran Saburai Vol 2, No 01 (2022): ENSIKLOPEDIA: Jurnal Pendidikan dan Inovasi Pembelajaran
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/esp.v2i01.1598

Abstract

Penelitian ini bertujuan untuk 1) mengetahui hasil analisis kebutuhan e-LKPD yang digunakan di SMA Negeri 1 Deli Tua; 2) mengetahui tingkat kelayakan e-LKPD berbasis inkuiri terbimbing berdasarkan kriteria penilaian BSNP; 3) mengetahui respon guru kimia dan siswa terhadap e-LKPD berbasis inkuiri terbimbing pada pokok bahasan Iktan Kimia, dan; 4) mengetahui kemampuan berpikir siswa setelah menggunakan e-LKPD berbasis inkuiri terbimbing. Adapun objek dalam penelitian ini adalah e-LKPD berbasis inkuiri terbimbing. Subjek dalam penelitian ini adalah 2 validator ahli materi, 2 validator ahli media, 2 guru kimia, dan 33 siswa kelas X MIA. Instrumen yang digunakan adalah pedoman wawancara guru kimia, angket analisis kebutuhan, angket respon guru dan siswa serta angket kelayakan e-LKPD sesuai dengan standar BSNP. Penelitian ini menggunakan metode dan pengembangan media dengan model 4D. Model 4D terdiri dari beberapa tahapan, yaitu Define, Design, Develop, dan Disseminate. Hasilnya adalah 1) Hasil analisis kebutuhan menyatakan bahwa siswa membutuhkan bahan ajar berupa LKPD dengan berbasis model pembelajaran inkuiri terbimbing pada pokok bahasan ikatan kimia dan seluruh siswa menyatakan setuju apabila dikembangkan bahan ajar berupa LKPD dalam bentuk elektronik berbasis inkuiri terbimbing sebagai penunjang kegiatan pembelajaran; 2) Tingkat kelayakan e-LKPD berbasis inkuiri terbimbing pada pokok bahasan ikatan kimia berdasarkan penilaian BSNP dihasilkan persentase rata-rata sebesar 85,14 persen dengan diperoleh hasil kriteria sangat tinggi dan valid/layak; 3) Respon guru terhadap e-LKPD berbasis inkuiri terbimbing pada pokok bahasan ikatan kimia adalah sebesar 87,49 persen dengan kriteria sangat menarik, sedangkan berdasarkan respon siswa kriteria sangat menarik dengan persentase 83,08 persen, dan yang terakhir 4) hasil kemampuan berpikir kritis siswa setelah menggunakan e-LKPD berbasis inkuiri terbimbing memperoleh nilai rata-rata di atas 75 yang menandakan bahwa penerapan media ini sudah sangat baik.
PENGEMBANGAN KIT PEMBELAJARAN DARI LIMBAH SEKAM PADI PADA MATERI BENTUK MOLEKUL KELAS X SMA Adelia Yesya Putri Hasibuan; Iis Siti Jahro
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 2, No 1 (2020): APRIL 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.731 KB) | DOI: 10.24114/jipk.v2i1.16633

Abstract

Learning media has a very important role because it can increase motivation, improve understanding and retention of learning. But the reality in school learning media is often overlooked for reasons of diffuclty finding the right media and limited time to make it yourself. To overcome the nothingness of learning media on molecular shape material, learning media from rice husk waste are developed. This study aims: (1)To know the feasibility of KIT learning media which used in learning activities. (2)To know student learning outcomes by using KIT learning media is higher than KKM. (3)To know student learning activities by using KIT learning media. This type of research is development of ADDIE research model carried out in class XI MIA 2 SMA Swasta Budisatrya Medan. The results of the research are: (1)KIT Learning on molecular shape material has been developed is feasible for use and is in accordance with Ministry of Education and Culture standards with a percentage of 96.87%. (2)Student learning outcomes that use KIT learning media on molecular shape material are higher than KKM. (3) Student learning activities using KIT learning media on molecular shape materials reach the criteria of Good with an average value of 90.
Pengembangan KIT Pembelajaran Dari Limbah Pada Materi Ikatan Kimia Untuk Meningkatkan Hasil Belajar Siswa Khuzaimah Dasopang; Iis Siti Jahro
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 2, No 2 (2020): OKTOBER 2020
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (578.932 KB) | DOI: 10.24114/jipk.v2i2.19816

Abstract

The research with the title Development of Chemical Learning KIT from Waste on Chemical Bonding Materials to Improve Student Learning Outcomes in Class X high school aims to find out whether the KIT created can meet the eligibility standards of a KIT and can improve student learning outcomes. The population in this study were all students of class X SMA Budisatrya Medan. The sample used in this study was taken by purposive sampling of one class, namely class X MIA 1 as an experimental class that was taught using KIT learning media. The test instruments used in this study were 20 questions that have been tested valid. Based on the results of data analysis, the KIT Learning media made have met the eligibility standard and in the hypothesis test the data obtained from the calculation table obtained tcount= 13.90 while at 1.696 ttable, so the tcount is higher than the ttable value (tcount>ttable) then Ho rejected and Ha accepted so it can be concluded that the average chemistry learning outcomes of students taught using the Chemical Bond KIT learning media are made higher than the KKM value (by 70) ie the average posttest score of students is 84.29.
Pengembangan Handout Titrasi Asam-Basa Berbasis Android Terintegrasi Model Discovery Learning dan Soal-soal HOTS Catur Kurniawan; Iis Siti Jahro
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 3, No 2 (2021): OKTOBER 2021
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (751.81 KB) | DOI: 10.24114/jipk.v3i2.28207

Abstract

Penelitian ini bertujuan untuk mengetahui: (1) Hasil analisis mengenai kelebihan dan kekurangan Handout titrasi asam-basa di internet, (2) Tingkat kelayakan Handout Titrasi Asam-Basa Berbasis Android Terintegrasi Model Discovery Learning dan Soal-soal HOTS, (3) Respon Siswa dan respon guru terhadap Handout Titrasi Asam-Basa Berbasis Android Terintegrasi Model Discovery Learning dan Soal-soal HOTS yang dikembangkan. Jenis penelitiannya adalah (R&D) dengan menerapkan model pengembangan 4-D oleh Thiagarajan. Tahapan tersebut adalah define, design, develop, dan disseminate. Handout Titrasi Asam-Basa Berbasis Android Terintegrasi Model Discovery Learning dan Soal-soal HOTS yang telah dikembangkan divalidasi oleh 5 orang ahli dan diperoleh skor 94,72; 96.14; 99.10; 95,00 dan 98,11% masing-masing dikategorikan sangat layak. Respon siswa dan guru terhadap Handout Titrasi Asam-Basa Berbasis Android Terintegrasi Model Discovery Learning dan Soal-soal HOTS dikategorikan sangat baik dengan persentase 91,27 dan 100%. Itu menunjukkan bahwa Handout Titrasi Asam-Basa Berbasis Android Terintegrasi Model Discovery Learning dan Soal-soal HOTS layak diterapkan untuk proses belajar mengajar.
Development of Learning Media using iSpring Presenter Based HOTS-Literacy on Acid-Based Materials Anisa Nursalsabillah Nasution; Iis Siti Jahro
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 5, No 1 (2023): APRIL 2023 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v5i1.45010

Abstract

In the 21st century, education is becoming increasingly important to ensure students have learning and innovation skills, skills in using information technology and media, and can work and survive using life skills. One of the life skills that students must have now is HOTs-literacy. This research aims to (1) to find out learning media used in learning process; (2) to design a prototype that will be developed to produce a learning media based on HOTs-literacy; (3) to find out whether the learning media that has been developed meets the criteria; (4) to find out student responses to the media. The method used in this research is 4D model. The result: Based 5 validators it was found 86.6% with a very high Percent Interpretation and a “Eligible” level of eligibility of the media and for the student responses get 95.71% with “very interesting” level. This shows that the HOTS-Literacy-based learning media using iSpring on acid-base material that has been developed is very attractive to students, so it can be used as a supporting medium in learning chemistry.
Co-Authors Adelia Yesya Putri Hasibuan Agnes Yuniarty Simbolon Aldo Geo Frengky Saragih Amalia, Meisya Anggun Maharani Angin, Jansen Riko Perangin Ani Sutiani Ani Sutiani Anisa Nursalsabillah Nasution Annisa Rahayu Annisa Rahayu Ardiansyah Ardiansyah Asep Wahyu Nugraha Asep Wahyu Nugraha Aulianti, Dita Ayi Darmana Ayi Darmana Ayi Darmana, Ayi Az Zahra, Salwa Banu Nursanni Bohari M. Yamin Bohari M. Yamin Br Bangun, Kurnia Wati Catur Kurniawan CINDY CINDY Daeli, Dinastini Damanik, Haryana Damanik, Syifa Namira Debora Putri Sitorus Debora Putri Sitorus Desri Berliana Daeli Djulia Onggo Djulia Onggo Djulia Onggo Dwi Rahmanisa Dwiyanda, Fadhilla Efrio Angelina Sitio Elit Manaman Gulo Esther Jacoba Martha Vertelman Fadhila, Nabila Nur Fahimah Martak Fitria Febrianti, Fitria Gavril Orlando Tumio Manalu Gurning, Mita Agresia Harahap, Dhini Haryati Hotma Br Butar Butar Hutagalung, Tien Parsaulian Hutagaol, Rahul Hutauruk, Rafli Intan Ayu Safitri Intan Fahira Yuzan Ismunandar Ismunandar . Ismunandar Ismu Izwani, Putri Khairi Jasmidi Jasmidi Jasmidi Juwitaningsih, Tita Khaira, Mutiah Khuzaimah Dasopang Maibang, Siti Rahmah MANIK, INDA WATI Manullang, Marisa Marham Sitorus Marpaung, Mutiara Evelin Yoseva Meli Sartika Silaban Moondra Zubir Mutia Patmasari Batubara Nasution, Anisa Nursalsabillah Nasution, Fadiya Malona Nasution, Rida Anastasia Nikita, Ade Rani Nurfajriani Nursanni, Banu Panjaitan, Nola Sari Petra van Koningsbruggen Pratama, Muhammad Rizky Putri Faradilla Putri Rizkia, Putri Putri Yustika Sary Rafida Khairani Ratu Evina Dibyantini Ratu Evina Dibyantini Regina Gresella Br Panjaitan Retno Dwi Suyanti Rode Juwita Sinaga Said, Fahrezi Hasyim Sakinah, Sheila Saragih, Innovayani Sarah, Arina Sami Sarnika Simbolon Sary, Putri Yustika SATI, NAFFA Sembiring, Niki Arih Ersada Br Sembiring, Silvia Gressiela Br Siahaan, Suria Bersinar Sihombing, Cindy Monalisa Sijabat, Hotman Priwaldi SIMANJUNTAK, PUTRINA Simanullang, Selafionita Simaremare, Happy G. Maritoma Simatupang, Septania Oniza Sinaga, Steven Siregar, Anggita Rahma Siregar, Eka Guspi Anti Sitorus, Francisca T. A Situmorang, Elsa Hasri Novensa Sri Adelia Sari Suryani Suryani Suryani Suryani Susanto Imam Rahayu Susanto Imam Rahayu Sutiani, Ani Syafira, Eka Ananda Syafitri, Amelia Syafriani Syafriani, Syafriani Syahputra, Ricky Andi Tama, Gita Citra Tania Evelin Turnip, Yulika Hotrina Vebilla May Ningsih Veronika, Christy Chirona Windayani, Neneng