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All Journal Jurnal Periodic Jurusan Kimia UNP Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Walisongo Journal of Chemistry Eksakta : Berkala Ilmiah Bidang MIPA Pelita Eksakta G-Tech : Jurnal Teknologi Terapan Journal of Educational Chemistry (JEC) Edukimia Entalpi Pendidikan Kimia Ekasakti Jurnal Penelitian dan Pengabdian (EJPP) SCIENCE : Jurnal Inovasi Pendidikan Matematika dan IPA Jurnal Pijar MIPA Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) Entalpi Pendidikan Kimia Jurnal Pengabdian Pada Masyarakat Chimica Didactica Acta : Journal of Chemistry and Chemistry Education Indonesian Journal of Chemical Science
Fajriah Azra
Universitas Negeri Padang
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Description of student learning difficulties in the acid-base material Annisa Annisa; Fajriah Azra
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i5.5583

Abstract

Acid-base material is material that class XI IPA students study in the even semester. In this material, 81.38% of class XI IPA students at SMAN 16 Padang have yet to achieve the minimum criteria set. It indicates that students have learning difficulties. Learning difficulties are failures to attain learning goals characterized by low learning outcomes. This study aims to determine the percentage of students who experience learning difficulties for each indicator on acid-base material and determine the factors that cause learning difficulties experienced by students in terms of learning methods. Its research is a type of descriptive research. The sample for this research was students in class XI IPA 2 at SMAN 16 Padang in the 2022/2023 academic year, which consisted of 34 people. The research instrument was a diagnostic test with two-tier multiple-choice questionnaires and interviews. The data analysis used is descriptive, namely analyzing and then providing an understanding of the data in the form of numbers so that an overview can be given in an orderly, concise, and clear manner. The results of this study stated that students of SMAN 16 Padang had learning difficulties in acid-base material, with a percentage of 66.65% in the high category. The highest difficulty level is found in the first indicator (Analyzing the properties of the solution based on the acid-base theory according to Arrhenius, Bronsted-Lowry, and Lewis) of 72.88%. Ineffective learning methods cause learning difficulties experienced by students. Effective ways of learning are making study schedules and carrying them out, reading and taking notes, repeating subject matter, concentrating, and doing assignments.
Description of students learning difficulties in the atomic structure Nesha Putri Adi; Fajriah Azra
Jurnal Pijar Mipa Vol. 18 No. 5 (2023): September 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i5.5584

Abstract

Atomic structure material is studied by high school students in class X in odd semesters. In this material, as much as 66.81% of class X students of SMAN 13 Padang have yet to achieve the minimum criteria set. It indicates that students have learning difficulties. Learning difficulties are failures in achieving learning goals characterized by low learning outcomes. This study aims to determine the percentage of learning difficulties experienced by students in atomic structure material and determine the factors that cause students' learning difficulties in terms of learning methods. This research is a type of descriptive research. The sample for this research was 36 students in class X E3 of SMAN 13 Padang in the 2022/2023 academic year. The research instrument was a diagnostic test with two-tier multiple-choice questionnaires and interviews. The data analysis used is descriptive, namely analyzing and providing an understanding of the data in the form of numbers so that an overview can be given in an orderly, concise, and clear manner. The results of this study stated that students of SMAN 13 Padang experienced learning difficulties in atomic structure material with a high category. The highest difficulty level is found in the fourth indicator (Determining electron configurations and quantum numbers), which is 81.25%. Learning difficulties experienced by students are caused by ineffective learning methods, such as not making a study schedule and not carrying it out, not reading and not taking notes, not repeating material, not concentrating on learning, and not doing assignments.
Desorpsi Anion Kromat (CrO42-) dari Adsorben Silika Mesopori Termodifikasi DMA (Dimethylamine) Septya Anggraini; Budhi Oktavia; Indang Dewata; Fajriah Azra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118120

Abstract

Mesopore silica modified with dimethylamine is one of the adsorbents used as a functional group for anion exchange and anion separation. Mesopore silica with the addition of amine compounds can be used to see the absorption capacity of silica against chromate anions using the column method. The absorption capacity of the chromate anion is 0.8609 mg/g with an absorption percentage of 99.3%. If the adsorption process has been maximized, the surface of the adsorbent is saturated or no longer able to absorb the adsorbate and equilibrium occurs, it can be continued with the desorption process. The factor used to see this desorption ability is the type of desorption, namely hydrochloric acid (HCl) with a release of 0.4061 mg of chromate anion with a desorption percentage of 95.3% and an optimum concentration of 0.1 M HCl with a release of 0.4287 mg chromate anion with a desorption percentage of 100%.
Pemodelan Hubungan Muatan Atom Bersih dengan Aktivitas Senyawa Turunan Metronidazol Ariloksi sebagai Antikanker Payudara dengan Metode AM1 Qory Sidwa Jufri; Fajriah Azra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.117621

Abstract

An analysis study of the relationship between the net atomic charge modeling of 13 aryloxy metronidazole derivative compounds as anti-breast cancer has been carried out, which aims to obtain the net atomic charge value and the HKSA equation. The method used is the semi-empirical method of Austin Model 1 by performing geometry optimization. The best equation model selection is done by means of statistical correlation analysis and multilinear regression with the Backward. From the research results, model 1 is the best model with the equation LogIC50=-777.834+(146.644*qC2)+(434.317*qC5)+(1299.237*qN7)-(243.853*qO8)-(65.686*qC10)-(137.823 *qC11)+(66.348*qO12) Dengan n=7; R= 0.943; R2= 0.89; SE= 0.14774; Sig= 0.036; PRESS= 0.10914.
Pengembangan Aplikasi Android Sebagai Media Pembelajaran pada Materi Bentuk Molekul untuk Kelas XI SMA/MA Cici Nur Awida; Fajriah Azra
G-Tech: Jurnal Teknologi Terapan Vol 8 No 1 (2024): G-Tech, Vol. 8 No. 1 Januari 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i1.3969

Abstract

The purpose of this research is to develop a product in the form of an android application on molecular shape material for class XI SMA / MA which is valid and practical. This type of research is research the Plomp development model which consists of three stages of research, namely preliminary research, prototyping and assessment phase. This research is limited to the small group practicality stage. The validity test was conducted by four chemistry lecturers from FMIPA, UNP as material and media experts, two lecturers from FT, UNP as media experts and two teachers from SMAN 9 Padang as material experts. Practicality was conducted on two teachers and twelve students. The validity analysis technique uses Aiken's V index and the practicality technique uses the percentage formula. The findings demonstrated that while the small group practicality prAoduced very practical results (the percentage value of practicality was 90,36% for teachers and 87,02% for students), the android application as a learning medium developed was classified as valid (obtained an average value of 0.90 for material experts and 0.92 for media experts).
Pencil Lead Electrode Modifikasi Lapisan Tipis Emas Untuk Deteksi Formaldehida Secara Voltametri Siklik Malinda, Tasya; Sari, Trisna Kumala; Nasra, Edi; Azra, Fajriah
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124470

Abstract

Formaldehyde is a toxic, carcinogenic, mutagenic and genotoxic compound that can harm the human body. Formaldehyde can threaten human health such as, can cause eye, nose and throat irritation and contact dermatitis on the skin. This research aims to study the response of pencil lead electrode (PLE) and pencil lead electrode (PLE) modification with gold thin layer in the development of formaldehyde sensor by using cyclic voltammetry. The electrode modification was done by potential-sweeping electrodeposition of Au on electrode and known as Au/PLE electrode. The resulting electrode has high conductivity and excellent catalytic activity because it is able to provide a large current response. In this study, the optimum conditions will be determined based on variations supporting electrolyte and cycle gold thin layer electrodeposition. Variations in supporting electrolyte and cycle for gold thin layer electrodeposition on the formaldehyde sensor give different peak current and potential results. KOH 0,1 M  is supporting electrolyte optimum and cycle for gold thin layer electrodeposition optimum is one cycle.
Development of Four-tier Diagnostic Test Instrument to Identify Students' Mental Models on Salt Hydrolysis Materials Maulidiana, Cindy Vikem; Azra, Fajriah
Jurnal Pendidikan dan Pembelajaran Kimia Vol 12, No 3 (2023): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

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

Abstract

Pengembangan Instrumen Tes Diagnostik Four-Tier Untuk Mengidentifikasi Model Mental Peserta Didik pada Materi Hidrolisis Garam. Model mental merupakan konsep pemikiran yang mewakili ide-ide digunakan untuk menggambarkan dan menjelaskan suatu fenomena. Model mental penting untuk diketahui agar guru dapat mengetahui tingkat pemahaman, kesulitan dan miskonsepsi yang dialami oleh peserta didik. Instrumen tes diagnostik merupakan salah satu instrumen yang dapat digunakan untuk mengetahui model mental peserta didik. Oleh sebab itu, penelitian ini bertujuan untuk mengembangkan instrumen tes diagnostik four-tier untuk mengetahui model mental peserta didik pada materi hidrolisis garam. Jenis penelitian ini adalah penelitian Research and Development (R&D) dengan menggunakan model pengembangan Treagust. Berdasarkan hasil analisis validitas logis diperoleh bahwa nilai rata-rata Aiken’s V sebesar 0.87 kategori valid. Berdasarkan hasil uji coba soal diperoleh bahwa hasil analisis validitas empiris pada first-tier dan third-tier terdapat beberapa soal tergolong valid dengan jumlah 18 soal dan 16 soal berturut-turut.  Nilai reliabilitas pada first-tier dan third-tier sebesar 0,78 dan 0,75 berturut-turut dengan kategori tinggi DOI: 10.23960/jppk.v12.i3.2023.10
Deskripsi Model Mental Peserta Didik Menggunakan Tes Diagnostik Four-Tier pada Materi Hidrolisis Garam di SMAN 1 Lengayang Jelita, Nabilah Putri; Azra, Fajriah
Edukimia Vol 6, No 3 (2024): Edukimia - Vol. 06, Issue 03
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ekj.v6.i3.a566

Abstract

Model mental peserta didik sangat penting untuk diidentifikasi, karena dapat mempengaruhi cara berpikir dan bertindak peserta didik dalam menyelesaikan permasalahan terhadap konsep yang diberikan. Model mental juga erat kaitannya dengan pemahaman dalam menghubungkan tiga level representasi kimia. Penelitian ini bertujuan untuk mendeskripsikan model mental peserta didik pada materi hidrolisis garam di SMAN 1 Lengayang. Jenis penelitian ini merupakan penelitian deskriptif dengan pendekatan kualitatif. Sampel yang diambil menggunakan teknik purposive sampling. Instrumen yang digunakan  yaitu tes diagnostik four-tier yang berbasis multirepresentasi kimia. Data yang diperoleh berupa deskripsi model mental peserta didik. Hasil analisis diperoleh bahwa model mental peserta didik sangat beragam, secara keseluruhan untuk tujuan pembelajaran persentase rata-rata model mental peserta didik yaitu Scientific Model, sebanyak 9,72%, Synthesis-Partial Understanding A sebanyak 9,15%, Synthesis-Partial Understanding B sebanyak 31,48%, Synthesis Misconception sebanyak 25,23%,, dan Initial Model sebanyak 24,42%. Persentase rata-rata secara keseluruhan kesesuaian hasil tes diagnostik dengan wawancara peserta didik adalah 89,58%.
Pengembangan Instrumen Tes Diagnostik Four-Tier Hukum Dasar Kimia untuk Mengidentifikasi Model Mental Peserta Didik Fadhillah, Trisa; Azra, Fajriah
Edukimia Vol 6, No 3 (2024): Edukimia - Vol. 06, Issue 03
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ekj.v6.i3.a568

Abstract

Pemahaman Memahami konsep kimia, terutama hukum dasar kimia, sangat penting untuk keberhasilan siswa. Model mental dapat digunakan untuk menggambarkan pemahaman tersebut. Tujuan penelitian ini adalah untuk membuat alat tes diagnostik empat tingkat untuk mengidentifikasi model mental siswa pada materi hukum dasar kimia. Selain itu, mereka juga ingin menguji instrumen tersebut apakah valid atau tidak. Untuk penelitian ini, metode Research and Development (RD) digunakan bersama dengan model pengembangan Treagust. Penelitian ini melibatkan tiga dosen kimia FMIPA UNP, dua guru, dan tiga puluh siswa kelas X Fase E di MAN 2 Kota Padang. Hasil penelitian menunjukkan bahwa instrumen tes diagnostik telah valid dan memenuhi kriteria instrumen, dengan nilai validitas logis rata-rata 0,96, dan reliabilitas pada tingkat pertama dan ketiga masing-masing 0,89 dan 0,86 masing-masing, yang dianggap sangat tinggi.
DESCRIPTION OF STUDENTS' MENTAL MODELS ON BUFFER SOLUTION MATERIALS USING FOUR-TIER DIAGNOSTIC TESTS Ramadhani, Fajri; Azra, Fajriah
Chimica Didactica Acta Vol 12, No 2: December 2024
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jcd.v12i2.42101

Abstract

Mental models are very important to know because they can describe the level of students' understanding of chemical phenomena related to certain materials, one of which is a buffer solution that emphasizes the interconnection understanding of the three levels of chemical representation. This study aims to describe the mental model of students in buffer solution materials. The research method used is quantitative descriptive. The sampling technique was purposive sampling, with a sample of 35 students. The research instruments used were a four-tier multiple choice diagnostic test based on mulltire, chemical presentations, and interviews.The results showed that the mental models of students on the buffer solution material were diverse, namely: Scientific Model with a percentage of 18.05%, Synthesis-Partial Understanding A of 5.35%, Synthesis-Partial Understanding B of 32.34%, Synthesis-Misconception of 26.27%, and Initial Model of 21.54%. The percentage of agreement between the test answers and the interview answers was 75% which showed that the answers given in the test and the interview were correct from the students' own understanding.
Co-Authors Achie Keylla Ahmad Raisan R.P Ananda Putra Andromeda Andromeda Andromeda Anisa Pradila Annisa Ade Putri Annisa Annisa Annisa Khairani Putri Asmiyunda Asmiyunda Aulia, Diva Aura, Selfi Monica AYU WULANDARI Azzahra, Siti Baehaqi Batri, Vani Mayfi Bayharti . Bayharti Bayharti Budhi Oktavia Cici Nur Awida Della Rezkyta Amanda Devi, Novi Arnita Dinda Purnama Kristy Dwi Finna Syolendra Edi Nasra Elfa Hayati Fadhillah, Trisa Faizah Qurrata Aini Fauzana Gazali Fitri Amelia Guspatni Guspatni Halizah, Wardah Hardeli - Hardeli Hardeli Indang Dewata Intan Nadya Istiva Depiyahani Jelita, Nabilah Putri Kristy, Dinda Purnama M. Iqbal S.G Ma'ruf, Hanif Sabawi Malinda, Tasya Mardani, Meri Aulia Maulidiana, Cindy Vikem Melati Wahyuni Meri Aulia Mardani Miftahul Khair Minda Azhar Minda Azhar Mirella Fonda Maahury Munifa Mahdiah Nadya UP Nagmah Putri Dinda Toni Nesha Putri Adi Nofri Yuhelman Norma Wahyunita Pera Meilita Pidiana, Dhea Putri Jelita, Nabilah Putri, Fitria Eka Qory Sidwa Jufri Rahadian Zainul ramadhan, muhammad_arvito Ramadhani, Fajri Randa Sagita Rifka Andani Riga Riga Riri Wahyuni Robiatul Adawiyah Sagita, Randa Sari, Trisna Kumala Selfi Monica Aura Septya Anggraini Shelvy WA Silvinia Humaira Silvira Rahmi Suryelita Suryelita . Syafriadi, Riko Syamsi Aini Tessa Faradilla Ulfa Autafia Umar Kalmar Nizar Vani Mayfi Batri Viona Maharani Yeri Mardesi Yerimadesi Yerimadesi . Zonalia Fitriza