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Hydrogen: Jurnal Kependidikan Kimia

hydrogen
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Published by Universitas Pendidikan Mandalika

ISSN : 23386487 EISSN : 26563061 DOI : Prefix 10.33394

Core Subject : Science, Education,

Chemistry Education

Hydrogen: The Chemistry Education Journal published by the Chemistry Education Study Program which contains articles raised from the results of conceptual research and studies in chemistry and chemistry education including education and learning, device development, media and learning models.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 664 Documents

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Identifikasi Senyawa Penyusun Produk Cair Hasil Pirolisis Aspal Alam dari Lawele Kabupaten Buton Rustam Musta; Muh. Siddik Ibrahim; Laily Nurliana
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Identification of Liquid Product Compounds from Natural Asphalt Pyrolysis from Lawele, Buton Regency has been carried out. This research is intended toidentify the content of the compounds contained in the liquid fraction from the pyrolysis of Lawele's natural asphalt. This is a research experimentwith natural asphalt material was simply pyrolyzed at a temperature of 350oC with a little vacuum. The resulting liquid products were analyzed using the GC-MS instrument and analysis showed that there were 24 compounds contained in the liquid fraction resulting from the pyrolysis of Lawele asphalt with 2 main components, namely Phenol (C6H6O) of 16.45% and acetic acid (C2H4O2) of 12.47%. Another important product is alkane derivatives, namely Undekane (C11H24) and cyclo-octene (C8H14) which can be used as fuel.

Analisis Kualitas Butir Soal Buatan Guru Kimia Pada Tes Ujian Tengah Semester Ganjil Kelas XII MIPA Hendrik Simamora; Hartono Hartono; Effendi Effendi
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

This researchi is want to knowithe test quality of items in the mid semester for XII Grade of SMA Negeri 1 PematangsiantarIin academic yearI 2020/2021 basic on terms of reliability test, validity, difficulty index, descriminationi index and disctractor. The research have used thecollecting data’s method was documentation and to collect some of test item, student answer sheet, answer key and so do interview to chemistry teachers in this school. Research used subject in this school were grade XII Science 1,2,and 3 of the science students of SMA Negeri 1 Pematangsiantar with total of subject 108 students based on purposive sanpling that researcher which has been used. The research have used method ofIanalyzed was quantitative descriptiveIconducted and it has used softwere program based of SPSSIversion 25 and Anates version 4.0.9. The result of the research concluded that the quality of the test item has some of category such as showed 2 items (10%) had very good quality and 2 items (10%)too had poorIquality of test and extremely poor quality in same test and should be suggest to thrown awayand 8 items (40%) known that has good quality, 4 (20%) has moderately quality, 3 (15%) has poor quality of item test and conclude that the quality of item test had moderately good quality based on this research.

Pengembangan E-Modul Berbasis Pemecahan Masalah Pada Materi Larutan Elektrolit dan Non-Elektrolit (ELNOEL) Ratna Sari Siti Aisyah; Solfarina Solfarina; Unita Yuliantika
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

High school students have difficulty in understanding “electrolyte and non-electrolyte” solution materials because they are mostly abstract. Students should study three aspects in electrolyte and non-electrolyte solutions including macroscopic, symbolic and submicroscopic. However, the fact that in school only accentuates macroscopic and symbolic levels. Then the learning resources cannot provide an explanation of the submicroscopic level and the learning model used does not make students active in accordance with the 2013 curriculum. This study aims to produce products in the form of problem solving-based Elnoel E-modules on electrolyte and non-electrolyte solution materials, as well as explaining the feasibility of E-elnoel module and student response to Elnoel E-module. This research is designed with ADDIE model with analyze, design, development, implementation and evaluation stages. This Elnoel e-module is validated by 7 experts (judment) that the results of material validation and media validation are declared valid with a value of 0.85 and 0.81. Then the Elnoel E-module was implemented to 9 students of grade XI science at Al-Qudwah Integrated High School to find out the student's response to the media developed by obtaining a percentage of 89% that belongs to the category very good.It can be seen that the development of media arranged based on problem solving can stimulate students’ thinking skills and get a positive response from students.

Kapasitas Total Antioksidan Ekstrak Metanol Biji Kakao (Theobroma cacao. L) Dengan Metode Spektrofotometri Uv-Vis Agung Ari Chandra Wibawa
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Antioxidant compounds is one of compounds are needed by the body to reduce free radicals. The ability of antioxidants to reduce free radicals is called antioxidant capacity. The purpose of this study was to provide information on the total antioxidant capacity of the methanol extract of cocoa beans with the DPPH (2,2-Diphenyl-1-Picrylhydrazyl) method using spectrophotometer uv-vis. The crude extract obtained was extracted using methanol solvent by maceration method. The results of the phytochemical screening test on the methanol extract of cocoa beans showed the presence of flavonoids and tannins. The total antioxidant capacity test of cocoa bean extract used the standard equivalent value of gallic acid which has been shown to have a strong antioxidant ability to reduce DPPH free radicals at a wavelength of 517 nm. The results of the measurement of total antioxidant capacity in the variation of treatment, namely sun-dried cocoa beans and oven cocoa beans were 27.730 and 42.454 mg/mL GAEAC. Based on the results of this study, it was found that the ethanol extract of oven cocoa beans had the greatest total antioxidant capacity, namely 42.454 mg/mL GAEAC.

Pengembangan Media Pembelajaran Berbasis Android Untuk Memfasilitasi Kebutuhan Pembelajaran Multiple Representation Nur Candra Eka Setiawan; Oktavia Sulistina; Habiddin Habiddin; Rucira Pavita
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 1 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

During the Covid-19 pandemic, learning is done online. Many students experience difficulties and decreased learning achievement while carrying out online learning. The reaction rate practicum learning media used at the high school level does not yet represent macroscopic, submicroscopic, and symbolic chemical concepts and has not been adapted to online learning. Multiple chemical representations can be applied using android-based learning media so that students are expected to understand the concepts in the reaction rate practicum. Android-based learning media is used to support the learning process. The purpose of developing android-based learning media on the reaction rate practicum concept is to produce android-based learning media and determine its feasibility. The development model used is the 4-D model by Thiagarajan, et al. The product developed in the form of an android-based reaction rate practicum learning media for students at senior high school. Based on the validation results indicate that the module is very feasible to use by meeting the percentage of 88.8%. The results of the readability test on the module obtained a percentage of 84.5%, so based on this assessment the module is very suitable for students to use as a learning resource and learning process in the classroom.

Potensi Eksudat Daun Sirih Merah (Piper ornatum L.) sebagai Insektisida Herbal terhadap Mortalitas Semut Hitam Erni Wahyuni; rizki nugrahani
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Chemical insecticide products had a negative impact on environment and health. One of the plants that can be used as an herbal insecticide is the betel plant. the red betel plant leaves are contain chemical compounds that potentialy toxic to insects, including essential oils, saponins, tannins, alkaloids and flavonoids. Black ants (Lasius fuliginosus L.) are insects that can have serious consequences if not treated, contaminate food and can transmit disease between humans and animals. The purpose of this research is to knowwing concentration is effective for black ant mortality. This research was connducted at Biology Pharmacy Laboratory of Nahdlatul Wathan University Mataram. This study consisted of 3 treatments and 2 controls (triplo for each treatment). Each repetition uses five black ants. The parameter of this study is the number of deaths per hour within three hours of the experiment. Observational data showed red betel leaf extract (Piper ornatum L) at concentrations of 25%, 50% and 75% had a significant effect on the mortality of black ants (Lasius fuliginosus L.). The higher the concentration, the more effective it is against black ant mortality. Concentration of 75% (treatment P3) has the highest effectiveness, which is 93.33%. The conclusion obtained from this study is that red betel leaf has the potential as an herbal insecticide on mortality of black ants, because red betel leaf has an effect on mortality of black ants at each concentration.

Efektivitas Ampas Tahu Sebagai Adsorben Logam Tembaga Pada Air Limbah Industri Dahlia Rosma Indah; Husnul Hatimah; Hulyadi Hulyadi
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Copper is one of the toxic metals for health and the environment. In humans, high doses of copper metal can cause vomiting, dizziness, weakness, kidney and liver symptoms, anemia, to coma, and in severe cases, the patient can die. Judging from the dangers, proper waste management is needed to reduce the side effects of these pollutants. A practical and inexpensive technology is an adsorption adsorption technique using an efficient and easily available natural adsorbent, namely tofu dregs. The protein contained in tofu is one of the reasons for using tofu waste as an adsorbent. The absorption of amino acids that form two-charged ions (zwitter ions) is owned by proteins. Toxic metal can be bound to protein as metallotionein. The study consisted of four stages, namely (1) Analysis of initial copper content in silver craft waste; (2) Preparation of tofu waste adsorbent; (3) Characterization of tofu dregs adsorbent; and (4) variation of adsorption contact time. The study used a laboratory-scale experimental method. The adsorbent was contacted with the sample using a magnetic stirrer at various times. Instrument Atomic Absorption Spectrometer was used for the analysis of copper metal content and identification of its functional groups using an infrared spectrometer with the result that tofu waste has functional groups -OH, NH (stretching), CH (aliphatic), C=O, -OH (bending vibrations). , and CO. Copper metal content obtained is 19.5979 ppm. The optimum adsorption time was reached at 120 minutes with an optimum adsorption efficiency of 54.88%.

Identifikasi Miskonsepsi Mahasiswa Pada Pembelajaran Daring Matematika Kimia Melalui Tes Diagnostik Three Tier Multiple Choice Rina Elvia; Salastri Rohiat; Sura Menda Ginting
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

The aim of this study is to determine the misconceptions of Chemistry Mathematics course participants during online learning in Chemistry Education Study Program, University of Bengkulu in the 2020/2021 academic year. This research starts with an online learning process for 4 meeting using Zoom meeting application and Google Classroom using synchronous and asynchronous methods. The method used to detect misconceptions is to provide a Three tier multiple choice diagnostic test consisting of multiple choice question, clear reasons in the form of an essay, and the level of confidence in answering and giving reasons. The tool used in this research is attest tool in the form of a diagnostic test and non-test tool in the form of an interview. Data collection techniques were conducted through test sheets in the form of a Google Forms application and short interviews about diagnostic tests in the form of videos. Data analysis was conducted on response options, reasons, and confidence in responding. The results showed that online learning had an impact on the misconceptions about Chemistry Mathematics course participants with a range of 0-50% where the highest misconception identification results were found in the application of inverse trigonometric functions by 50%,while 0% misconceptions were obtained in the basic concepts of algebraic functions and conversion of rational equations into a partial fractions.

Pengembangan Modul Pembelajaran Kontekstual Terintegrasi Augmented Reality untuk Meningkatkan Keterampilan Berpikir Kritis Siswa Ratna Azizah Mashami; Khaeruman Khaeruman; Ahmadi Ahmadi
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Pandemi Covid-19 membuat sistem pembelajaran di kelas menjadi terbatas sehingga siswa dituntut untuk belajar lebih mandiri. Akan tetapi, sumber belajar memadai yang mendukung kemandirian belajar kimia di SMAN 1 Batulayar masih sangat kurang. Penelitian ini bertujuan untuk mengembangkan modul pembelajaran kontekstual terintegrasi Augmented Reality untuk meningkatkan keterampilan berpikir kritis siswa pada materi ikatan kimia. Penelitian ini termasuk metode Penelitian dan Pengembangan. Tahapan penelitian mengikuti desain pengembangan model ADDIE yang terdiri dari lima tahap, yaitu analisis (Analysis), desain (Design), pengembangan (Development), penerapan (Implementation), dan evaluasi (Evaluation). Subyek penelitian adalah siswa SMAN 1 Batulayar yang berjumlah 40 orang. Instrumen dalam penelitian ini adalah angket dan tes uraian. Data kelayakan modul dan tanggapan siswa diperoleh dari angket lalu dianalisis berdasarkan persentase, sedangkan data keterampilan berpikir kritis didapatkan dari tes uraian lalu dianalisis menggunakan paired sample t-test dan skor gain ternormalisasi (N-gain). Adapun hasil penelitian ini antara lain: 1) modul dinyatakan sangat layak dengan rerata skor 90%, 2) modul dapat meningkatkatkan keterampilan berpikir kritis siswa yang ditunjukkan oleh nilai signifikan 0,00 pada taraf kepercayaan 95% dan skor N-gain 58% dengan kategori sedang, dan 3) siswa memberikan tanggapan sangat baik terhadap proses pembelajaran menggunakan modul. Dengan demikian, modul pembelajaran kontekstual terintegrasi augmented reality telah berhasil dikembangkan.

Pengaruh Kemampuan Berpikir Ilmiah dalam Pembelajaran Inkuiri Terbimbing terhadap Hasil Belajar Siswa Trining Puji Astutik
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

To understand microscopic representation, scientific reasoning skill (SRS) is required. Unfortunately, some research has reported that many senior high school students have not developed formal thinking ability which is necessary to support the development of SRS. Research results reported that guided inquiry is a mode of learning effective in developing students’ formal thinking ability. Therefore, guided inquiry is also expected effective in developing SRS.This study, thus, aimed to identifythe effect of students’ scientific reasoning skill on their achievement. Participants were selected from two classes of grade X Science and Math students at SMA Laboratorium UM. They were matched based on their scientific reasoning skill test score. Two similar groups were obtained where each group consisted of 6 students with concrete level, 6 students with low formal level, and 4 students with upper formal level. A group of students were taught using guided inquiry learning. Data collected was the students’ score on scientific reasoning skill (SRS). The reliability of Bahasa Indonesia version test measured was 0,74. The data was analyzed using ANOVA. The results of this study showed that the students who were at the upper formal level of SRS had better achievement than those who were at the low formal and concrete level of SRS.

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