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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 618 Documents

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PENGEMBANGAN MODUL KIMIA MATERI SISTEM KOLOID BERBASIS PROBLEM BASED LEARNING (PBL) DI KELAS XI MIPA 4 SMA ulfa zuaimah baroro
Hydrogen: Jurnal Kependidikan Kimia Vol 7, No 1 (2019): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Penelitian ini merupakan penelitian pengembangan. Tujuan penelitian ini untuk menghasilkan modul kimia materi sistem koloid berbasis Problem Based Learning yang valid dan praktis. Model pengembangan yang digunakan adalah model ADDIE (Analysis, Design, Development, Implementation, Evaluation) dan dievaluasi dengan metode evaluasi formatif Tessmer. Tahapan evaluasi formatif Tessmer dalam penelitian ini meliputi self evaluation, expert review, one- to-one dan small group. Analisis data uji kevalidan dan praktisan menggunakan uji validitas aiken. Uji validasi pada tahap expert review menghasilkan rata-rata nilai koefisien Aiken sebesar 0,86 dengan katagori tinggi (sangat valid). Rata-rata nilai koefisien Aiken uji praktisan pada tahap one-to-one sebesar 0,89 dengan kategori tinggi (sangat praktis) dan small group memperoleh nilai 0,77 dengan kategori tinggi (sangat praktis). Hasil penelitian menunjukkan bahwa modul kimia materi sistem koloid berbasis problem based learning tergolong valid, praktis.

Pengaruh Model Pembelajaran LC Dipadu Diagram Alir terhadap Kualitas Proses dan Hasil Belajar Kimia Siswa Suryati Suryati
Hydrogen: Jurnal Kependidikan Kimia Vol 1, No 1 (2013): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Lajureaksi merupakan salah satu pokok bahasan yang dianggap sulit oleh siswa, karena karakteristik konsep-konsep dalam materi laju reaksi yang pada umumnya merupakan konsep-konsep yang abstrak dan melibatkan perhitungan-perhitungan kimia yang cukup sulit serta siswa harus memahami konsep lain yang mendasarinya seperti stoikiometri dan konsentrasi. Model pembelajaran Learning Cycle (LC) dipadu dengan diagram alir dipandang potensial efektif untuk meningkatkan kualitas proses pembelajaran. Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Learning Cycle dipadu dengan diagram alir terhadap kualitas proses dan hasil belajar kimia siswa kelas XI SMAN2Malang.Penelitian ini menggunakan rancangan deskriptif dan rancangan eksperimen semu. Penelitian dilaksanakan di SMAN 2 Malang, pengambilan sampel ditentukan dengan teknik purposive random sampling, memilih 2 kelas yaitu kelas XI-A1 sebagai kelas eksperimen dibelajarkan dengan model pembelajaran Learning Cycle dipadu dengan diagram alir sedangkan kelas XI-A2 sebagai kelas kontrol dibelajarkan dengan model pembelajaran Learning Cycle saja pada materi laju reaksi. Hasil penelitian menunjukkan bahwa: 1) Pada materi laju reaksi hasil belajar siswa yang dibelajarkan dengan model pembelajaran LC dipadudiagram alir lebih tinggi dibandingkan dengan hasil belajar siswa yang dibelajarkan dengan model pembelajaran LC saja, dan 2) Pada materi laju reaksi kualitas proses pembelajaran siswa yang dibelajarkan dengan model pembelajaran LC dipadu dengan diagram alir dan pembelajaran model LC saja sama-sama berlangsung dengan baik.

Gagasan Model Pembelajaran Mobile–NOS Untuk Peningkatan Literasi Sains Siswa Yusran Khery; Baiq Asma Nufida; Suryati Suryati; Sri Rahayu; Endang Budiasih
Hydrogen: Jurnal Kependidikan Kimia Vol 6, No 1 (2018): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

This article describes the idea of a mobile learning model - NOS for enhancingstudents' scientific literacy and student responses to these ideas. This article iscompiled based on literature studies, simple observations on several variablessupporting mobile learning at IKIP Mataram, and evaluating prospective userresponses to the development idea using a questionnaire. Respondents were 54students of IKIP Mataram Chemistry education. The response data is processedby percentage formula based on category criteria. Mobile-NOS learning islearning that applies the Nature of Science (NOS) learning steps with the supportof learning media in the form of mobile applications that can be applied in smartmobilephone. The six main steps in implementing learning are oriented to Natureof Science (NOS), namely: (1) Reading the context on electronic articles; (2) Indepthquestioning; (3) Observation of cases and targets; (4) DemonstrationProcedure; (5) Library Search; (6) Implementing Procedures; (7)Communicating Science Knowledge; and (8) Authentic Assessment.The results ofthis study showed an average response to the idea of developing NOS-orientedmobile learning at 85.23% with a very good category.

Pengembangan Buku Ajar Dengan Model Inkuiri Berbasis Strategi Konflik Kognitif Untuk Meningkatkan Keterampilan Berpikir Kritis Siswa Dahlia Rosma Indah; Husnul Hatimah
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 2 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Chemical bonding contains basic concepts that are used to understand almost any topic in chemistry. Several research results show that there are still many misconceptions. Therefore, teaching materials are needed that can provide a correct understanding of the basic concepts in chemical bonding materials. This study aims to produce inquiry model chemistry teaching materials with cognitive conflict strategies for Muallimat NW Pancor high school. The development method used definne, design, development and dissemination. Data analysis was conducted in the form of product validity tests and students' critical thinking skills tests. However, in this development research, it only stopped at the third stage. The data obtained were quantitative and qualitative. The results is (1) the feasibility of the material was 84% (very feasible); (2) the systematic feasibility of the presentation is 85% (very feasible); (3) language feasibility is 85.33% (very feasible). So that overall the teaching materials produced are categorized as very feasible and can be used in chemistry learning.

EFISIENSI ISOLASI MINYAK ATSIRI DARI KULIT JERUK DENGAN METODE DESTILASI AIR-UAP DITINJAU DARI PERBANDINGAN BAHAN BAKU DAN PELARUT YANG DIGUNAKAN Suci Cahyati; Yeti Kurniasih; Yusran Khery
Hydrogen: Jurnal Kependidikan Kimia Vol 4, No 2 (2016): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Citrus nobilis L. peel was used as a source of essential oil production through water-stem distillation method. The aim of this research was to compare yield and quality of essential oil from Citrus nobilis L. peel obtained from ratio of 0,2; 0,4 and 0,6 of raw material mass and solvent volume during water-stem distillation. In each run, 1000 mL of water was applied as solvent, and the distillation was performed for 6 hours.. Results show that the best yield and quality of the produced essential oil was obtained on 400 gram/1000 mL ratio. This ratio produced essential oil in a yield of 2.18 %, 0.8484 gram/ mL density, yellowish oil with orange typical aroma, and viscous. GC-MS analysis results of the oil show the composition of Limonene 56,96%, α-Pinene 3,86%, β-Phellandrene 1,02%, β-Pinene 2,40%, β-Myrcene 2,76%, Linalool 7,69%, 3-Cyclohexene-1-methanol 2,04%, Nerol 1,44% and Benzenedicarboxylic acid 14,50%.

Pengembangan Karakter Siswa Dan Kemampuan Berpikir Kreatif Melalui Pembelajaran Cooperative Integrated Reading And Composition (CIRC) Yang Terintegrasi Dalam Pembelajaran Kimia Rizka Anggraeni; Khaeruman Khaeruman; Raehanah Raehanah
Hydrogen: Jurnal Kependidikan Kimia Vol 2, No 2 (2014): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

This study aims to determine character of student after learning CIRC and effect of CIRC learning to creative thinking skills on atomic structure and the periodic system of unsure matter. This research used an experimental method, the type of quasi experiment with Pretest-posttest control group design. Sample consists of 2 class of experiment class (CIRC learning) and control class (a lecture and question and answer) were selected by Cluster Sampling. Data retrieval research using observation sheet for character development and for creative thinking skills using the form of description test. Data on the observation of student character shows the character of students do not get better after learning CIRC compared with a lecture and question and answer on atomic structure of matter and the periodic system of unsure, as looking the average value of the experiment class is 76,97 lower than the control class is 79,12. Data analysis for hypothesis using u-test with SPSS 15.0 for Windows. Based on data analysis get significant value (0,166) > significant a (0,05). It can be concluded that there is no effect CIRC learning to creative thinking skills on atomic structure of matter and the periodic system of unsure.

Upaya Menurunkan Kadar Ion Logam Besi Pada Air Sumur Dengan Memanfaatkan Arang Ampas Tebu Dahlia Rosma Indah; Hendrawani Hendrawani
Hydrogen: Jurnal Kependidikan Kimia Vol 5, No 2 (2017): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

The levels of iron metal ions in the well water can cause health problems,causing the yellow color on the walls of the bathroom tub and the yellowspots on the clothes. One way of water treatment is by adsorption techniqueusing charcoal from bagasse. The first step is to first determine the level ofiron metal ions in the well water in the village of Palempat, BatulayarDistrict, West Lombok. Furthermore, the well water is contacted with sugarcane bagasse. The manufacture of amphibians includes the samplepreparation process, wash with water, drying in the sun, and the refining at250ºC for 2.5 hours then sieved. The sugarcane bagasse that has been putinto 100mLsampelair well with a mass of 2 grams of adsorbent. Samples werethen stirred at contact time variations of 30, 60, 90, 120 and 150 minutes at180 rpm using a batch system. The best contact time used to calculate theefficiency of decreasing iron metal ion content is by calculating the differenceof iron metal ions before adsorption and after adsorption using charcoal ofbagasse. From the research, it was found that iron metal ion content in thesample was 0.1683 ppm. The optimum contact time on iron metal ionadsorption is at 120 minutes contact resulting in optimum adsorptionefficiency in iron metal that is 65.83%.

Pemisahan Perak dari Limbah Fotorontgen dengan Teknik Membran Cair Berpendukung Menggunakan Pengemban Gabungan TBP dan D2EHPA Yeti Kurniasih; Ahmadi Ahmadi; Baiq Asma Nufida
Hydrogen: Jurnal Kependidikan Kimia Vol 8, No 1 (2020): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

The photorontgen process produces waste that is harmful to the environment because it contains silver ions that are toxic to living organisms. The silver content in photorontgent waste is 2000 mg / L, while the permissible threshold value for silver in aquatic is 0.1 - 1.0 mg / L, so the disposal of photorontgent waste into the waters will be dangerous. However, silver metal has high economic value so that silver metal separation from x-ray waste is required, in addition to reducing the environmental burden due to silver metal pollution, it is also expected to reuse the silver metal economically. The technique of separation that can be used is a supported liquid membrane (Supported Liquid Membrane, SLM). This technique has the advantage that its separation process is relatively easy because the extraction and stripping process takes place in one stage, the carrying solution as extractant is more stable in the supporting membrane and the amount of extractant required is small. This research studies the effect of waste dilution factors on the effieciency separation of silver from photorontgen waste. Separation was carried out at the optimum SLM condition by using combined carrier compound TBP and D2EHPA with a ratio of 0.25: 0.75, total concentration of 1 M in kerosene and 0.1 M HNO3 as stripping phase. Sample waste was diluted by a factor dilution 25, 50, 75 and 100 times. Measurement of metal content before and after separation is done with AAS. The results showed that the waste dilution factor influenced the efficiency of silver trasnpor through SLM. Percent of silver separation was obtained 21.33% in waste with 100 times dilution.

PERBANDINGAN VOLUME DAN MASSA NUTRIEN OPTIMUM PADA KARAKTERISTIK KIMIA NATA DE LERI DARI LIMBAH AIR CUCIAN BERAS Hasmawati Wahab; Ahmadi Ahmadi; Hulyadi Hulyadi
Hydrogen: Jurnal Kependidikan Kimia Vol 4, No 1 (2016): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

In the processing of rice into the rice used is rice that has been whased away, while the rice water thrown away because it was considered important that the rice water that is not used will be waste, it is necessary alternative in their utilization. The alternative is to make a food product by a fermentation process using bacteria Acetobacterxylinum called nata de leri. It is caused rice water contain nutrients such as carbohydrates, protein, and vitamin B1 or thiamine. This study aimed to compare the volume and optimum mass of nutrients at chemical characteristicts of nata de leri generated. This type of research was Pre-Experimental by varying nutrient source used was suger as a carbon source and tofu waste water as a source of nitrogen. In this research, was adding four variations of nutrient source that has been 100:25 (g/mL), 125:50 (g/mL), 150:75 (g/mL), 175:100 (g/mL). Furthermore, the analisisproksimat include moisture content, ash content, fat content, protein content, and carbohydrate content. Best treatment combination was obtained on the addition of nutrient source 125:50 (g/mL) which generate 78,7217% moisture content, ash content of 1,0707%, fat content of 0,5636%, protein content of 0,4776% and the carbohydrate content 19,1893%.

Penentuan Kadar Sianida Daun Singkong Dengan Variasi Umur Daun Dan Waktu Pemetikan Nova Kurnia; Fatmi Marwatoen
Hydrogen: Jurnal Kependidikan Kimia Vol 1, No 2 (2013): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Telah dilakukan penelitian untuk mengetahui kadar sianida yang terkandung dalam daun singkong. Daun singkong yang dijadikan sampel yaitu daun muda dan daun tua yang masing-masing dipetik pada pagi hari maupun sore hari. Penentuan kadar sianida dilakukan dengan metode titrasi pembentukan kompleks sianida. Hasil penelitian menunjukkan kadar sianida pada daun singkong muda dan tua yang dipetik pada pagi hari yaitu 3,46% dan 3,67%. Sementara kadar sianida pada daun singkong tua yang dipetik sore hari yaitu 2,81% dan 2,91%.

Page 9 of 62 | Total Record : 618

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