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Hydrogen: Jurnal Kependidikan Kimia
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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Kinetics of Tofu Pulp as Copper Metal Adsorbent on the Waste of the Silver Craft Industry Indah, Dahlia Rosma; Hatimah, Husnul
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.12462

Abstract

Liquid waste originating from the silver crafts industry is heavy metal waste that is dangerous for the surrounding environment, one of which is copper (Cu). Copper is a heavy metal that can have toxic effects on human health. Based on these problems, processing is needed to reduce the pollutants produced. One of the technologies used is adsorption using a natural adsorbent that is efficient and easy to obtain, namely tofu dregs. Adsorption using tofu dregs is because tofu contains protein. This protein has the ability to absorb amino acids which form two charged ions (zwitter ions). Toxic metals can be bound to proteins as metallothionein. This research aims to determine the efficiency of using tofu dregs as an absorbent for copper metal (Cu) and to determine the effect of contact time and adsorption isotherms on copper metal adsorption. 1 gram of tofu dregs was used with 25 ml of waste and then contacted with a magnetic plate stirrer at varying times of 30, 60, 90, 120 and 150 minutes. The concentrations of all copper metals were analyzed using an Atomic Absorption Spectrophotometer. Next, each copper metal content was calculated using a copper metal standard calibration curve. Identification using an Infrared Spectrophotometer showed that the tofu dregs waste in this study contained the functional groups -OH, N-H (stretching), C-H (aliphatic), C=O, -OH (bending vibration), and C-O. From the research it was found that the copper metal content in the sample was 19.5979 ppm. The optimum contact time for copper metal adsorption is 120 minutes, which results in an optimum adsorption efficiency for copper metal, namely 54.88%. The isotherm equation that corresponds to the adsorption of copper metal using tofu dregs waste is the Freundlich isotherm with a Kf value of 0.072 L/g and a 1/n value of 2.366. This shows that the adsorption of copper metal occurs in a multilayer layer on the surface of the tofu dregs adsorbent, which illustrates the occurrence of physical adsorption. Tofu dregs waste is an effective adsorbent for reducing copper metal levels in silver craft waste.
Biosynthesis of Gold Nanoparticles Using Wuluh Star Fruit (Averrhoa bilimbi) for Chromium Analysis Dewi, Ria Kemala; Firdaus, M. Lutfi; Nursa'adah, Euis
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10188

Abstract

One of the heavy metals that can pollute waters is the heavy metal chromium (Cr). Chromium has many important roles in life. Chromium material is widely used by humans for various purposes, especially in the industrial world. However, the large number of uses of chromium in the industrial world and the waste it generates can have a negative impact on the environment and human health. One way to deal with chromium pollution is by analyzing the presence of chromium in waters. The aim of this research is to analyze the presence of chromium using a simple, effective, economical and accurate method, namely the biosynthesis of gold nanoparticles using samples of starfruit (Averrhoa bilimbi) as a bioreductor rich in ascorbic acid, with a colorimetric method, namely a method based on the aggregation of gold nanoparticles with ascorbic acid from starfruit, which causes a shift in plasmons and causes color changes that can be seen by the eye. Based on the analysis results, data was obtained that gold nanoparticles synthesized from the starfruit bioreductor can detect chromium with a concentration of 10 ppm with optimum conditions at pH 5, temperature 75oC, optimum incubation time of 5 minutes and gold nanoparticles are selective and sensitive for detecting chromium.
Validity of Electronic Worksheet (E-LKPD) Based on PBL Model to Train Creative Thinking Skills on Acid-Base Material Ainiah, Errisya Nur; Yonata, Bertha
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.11587

Abstract

Creative thinking skills are important to train students to face the challenges of the 21st century and include higher order thinking skills. In addition, the independent curriculum provides freedom to think and innovate in learning. Therefore, one of the efforts to train creative thinking skills is to use relevant learning media, namely E-LKPD based on the Problem Based Learning (PBL) model. The purpose of this research is to produce PBL-based E-LKPD to train the creative thinking skills of grade XI students on acid-base material that is feasible to use, in terms of validity.  This research model is guided by Thiagarajan's 4D model (Define, Design, Develop, and Disseminate). However, the research only reached the development stage (Develop) to determine the validity of the product because there were limitations in time, funds, and energy. Validation was conducted by 3 validators to measure the content and construct validity of the developed E-LKPD. The results showed that the validity of the E-LKPD was considered valid based on the median score of content validity of 4 with a valid category and construct validity of 5 with a very valid category.
Feasibility of Natural Indicators Worksheets for 11th grade Student Muhammad Ridhwan Al Mu’min; Hairida Hairida; Masriani Masriani
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.10308

Abstract

This study aims to determine the level of eligibility of worksheets for natural indicators of acid-base 11th grade Senior High School (SMA/MA) students in even semester. The population used in this study is a population sample consisting of six validators consisting of two content validator validators, two linguistic validator validators, and two graphic feasibility validators. Data collection instruments used were content eligibility questionnaire, linguistic feasibility questionnaire, and graphic eligibility questionnaire. The data analysis technique used is Gregory. Results Processing data in terms of content eligibility has a validity of 1 so that it has a very high level of content eligibility. For language eligibility, continued validity is obtained at 1 so that the level of language eligibility is also very high. However, the validity of the worthiness of the graphic is only 0.5 so that the level of feasibility of the graphic is still categorized as moderate. Thus, it can be concluded that LKPD of the natural indicators of acid-base for 11th grade students in even semester is feasible to be used in the learning process with very high criteria for content and linguistic aspects and moderate categories for graphic aspects.
Documentary Video Media Development on Food Additives Sabdaningtyas, Katherina; Hairida, Hairida; Rasmawan, Rahmat; Masriani, Masriani; Hadi, Lukman
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.10846

Abstract

In this era, technology is advancing and developing rapidly. Almost every minute or even second we are in direct contact with technology. In today's world of education, it is also inseparable from the role of technology. Students who on average have good technological literacy tend to get bored more quickly when learning runs conventionally. Regarding the function of learning media, it can be emphasized as follows: as a tool to streamline learning, accelerate the teaching and learning process, and improve the quality of the teaching and learning process. The purpose of this research is to produce a documentary video about food additives that is expected to be utilized for ease of learning. The method used in this research is research and development developed by Borg and Gall. This documentary video media development procedure goes through stages, namely: (1) Research and information gathering, (2) Product development planning, and (3) Initial Product Development. Data or information collection techniques using literature studies and field studies. Stages of video development by creating a storyboard using a video editor application. The next stage of learning videos is validated or evaluated by experts.  This Documentary Video validation analysis uses descriptive methods through questionnaires. The results of the validation of this Documentary Video obtained an average score of 3.5 by entering the valid category. It can be concluded that this Video Documentary is suitable for use and can be followed up by looking at student responses.
Design of Augmented Reality Integrated Learning Applications on Acid and Base Subject Material for F Phase Students Sri Rahmadani; Guspatni Guspatni
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.9551

Abstract

The aim of this research is to create integrated augmented reality learning media in the form of an application that focuses on the acid base material in the F phase or senior high school phase. Along with the development of the world of education, various kinds of new learning media have emerged. One of the interesting technologies that can currently be developed on Android is Augmented Reality (AR). Augmented Reality is considered one of the most advanced technologies in virtual reality research and is effective as a learning medium, especially chemistry. Augemented Reality is a technology that combines the real world with a computer-generated virtual world so that the boundaries between the two worlds are very minimal. Because of its advantages, AR can be used to create learning applications that can support the teaching and learning process. One lesson that can utilize this technology is chemistry learning about acids and bases. This application was created with Blender 3D software to create 3D acid base objects, Easy AR and Unity 3D to build applications. This media design was adopted by the Plomp development media. Where the design of this media is in accordance with the needs of schools which expect learning media to contain animation and be guided by questions that can guide students in discovering concepts. It is hoped that this learning application can be used at school and outside school as a support in learning chemistry, especially acids and bases.
Development of Student Worksheet Based on Project Based Learning on Mixed Separation Material at SMKN 7 Pontianak Purba, Nasriani; Harun, Andi Ifriany; Ulfah, Maria; Enawaty, Eny; Rasmawan, Rahmat
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.10861

Abstract

Chemistry learning in schools still tends to be teacher-centered, so students have limitations in connecting subjects to real life. The material on the mixed separation related to basic competence skills will be achieved through chemical experiments, but there is no chemical laboratory in schools. The learning activities only use textbooks borrowed from the library, so there is a need for other teaching materials that can help students to carry out chemistry experiments in the form of PjBL based Student Worksheet (LKPD) on separating mixed. The aim of this research is to asses the feasibility of PjBL based LKPD in mixed separation and determine the responses of students and teachers. Research and development (R&D) uses the ADDIE model, but this research only reaches the development stage. The subjects in this study were PjBL-based worksheets on mixed separation materials which were tested on a limited basis (15 students) and a large scale (35 students) at State Vocational High School (SMKN) 7 Pontianak. Data collection techniques used are direct communication techniques and indirect communication. Data collection tools are interview guides, feasibility assessment sheets, student and teacher response questionnaires. The expert assessment using the Gregory test showed that the criteria were very feasible,  with a very high validity value of 1.00 for content, presentation, graphics and language aspects. The response test results with limited and extended trials obtained an average percentage of 85% and 86% respectively, and the response test results for 3 teachers obtained an average percentage of 88%. The results of the assessment indicate that the PjBL-Based Student Worksheet (LKPD) is very suitable for use in supporting chemistry experiments on mixed separation material in learning activities.
The Effectiveness of Interactive E-Modules as Learning Media to Train Visual Spatial Intelligence in Chemical Bond Material Fatmawati, Ria; Sukarmin, Sukarmin
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.8940

Abstract

This study aims to determine the effectiveness of interactive e-module that train students' visual intelligence on chemical bond material. Chemical bond is one of the high school chemistry materials that has basic concepts that must be mastered in order to understand other chemistry topics and abstracts require the ability to understand what must be stimulated. This study was compiled based on the 4D research and development (R&D) model. The subjects and population of this study were students of class XI IPA at SMAN 12 Surabaya. The effectiveness of the review of cognitive domain tests and spatial visual intelligence tests before and after the use of a 3D visualialization base interactive e-module. The analysis of this study used N-gain and normality statistical tests until the data were normally distributed. The effectiveness of the media was stated to be very effective with an N-Gain score on the cognitive test of 0.8 in the high category and the spatial visual intelligence test of 0.8 in the high category which shows the relationship between cognitive domain tests and visual spatial tests can improve understanding of chemical bond material. The results of the research show that it is feasible to implement
Mercury Metal Absorption using Ethylene Diamine Tetraacetic Acid Intercalated Carbon Dahlia Rosma Indah; Husnul Hatimah
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 5 (2023): October 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i5.10097

Abstract

Silver craft waste contains hazardous metals, one of which is mercury metal. If high concentrations of mercury waste are disposed of without treatment, this waste seeps into the soil and pollutes residential water sources because mercury metal is difficult to decompose. Mercury poisoning can cause nerve reactions such as difficulty speaking, blurred vision, muscle weakness, paralysis, impaired sense of taste, and shortness of breath. This research was conducted as an effort to reduce mercury metal levels in silver craft waste in Central Lombok Regency. The method of waste treatment is by adsorption method utilizing carbon bagasse modified with EDTA. The first step is to first determine the level of mercury metal in silver craft wastewater in Central Lombok. Furthermore, wastewater is contacted with EDTA-intercalated bagasse carbon. Making intercalated carbon bagasse consists of 3 stages, namely first dehydration by burning bagasse until it turns into carbon, second carbonation is heating temperature 500ºC, carbon results are sifted 100-200 mesh and third, intercalation is by soaking 100 grams of carbon in 250 mL EDTA solution 10% stirred for 6 hours. After that the carbon is dried at a temperature of 50ºC. A total of 2 grams of intercalated bagasse carbon that has been made is put into 25 mL of wastewater samples. The sample was stirred at contact time variations of 30, 60, 90, 120 and 150 minutes using a stirer. The optimum time obtained is used to calculate the efficiency of reducing mercury metal levels, namely calculating the difference in mercury metal levels before adsorption and after adsorption using EDTA intercalated carbon baggase. Mercury metal levels were analyzed using an Atomic Absorption Spectrophotometer (SSA). From the study, it was found that the mercury metal content in the sample was 50.6398 ppb. The optimum contact time in mercury metal adsorption is at a contact time of 120 minutes which results in an optimum adsorption efficiency in mercury metal of 70.55%.
Development of Science Process Skills Assessment Instruments in Environment Based Practicum on Reaction Rate Material Nurmala, Nurmala; Sahputra, Rachmad; Rasmawan, Rahmat; Masriani, Masriani; Melati, Husna Amalya
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10441

Abstract

This study aims to produce an Environmental-Based Chemistry Practicum Assessment Instrument for Reaction Rate Material for 11th Grade of MA/ SMA. The development model used in this research is the development model according to Borg and Gall which consists of 4 stages: Potential and Problems, Gathering Information, Product Design, and Design Validation. The development in this study refers to the product produced in the form of an assessment instrument. which is measured until the validity of the expert where the validity aspects are based on the results of the experts' assessment validation questionnaire. The aspects assessed in the product of the environmental-based practicum performance instrument assessment instrument are the feasibility of instructions, content feasibility and language feasibility. The assessment instrument in this content aspect is arranged sequentially according to the practicum procedure. Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 93%, then the linguistic aspect is divided into several assessment criteria, including the use of language in accordance with EYD, clarity of instructions and directions and the language used is straightforward and easy to understand Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 91%. The validity level of the chemistry practicum performance assessment instrument measured practicum performance in the form of scores 1-4. Determination of the validity of the practicum performance assessment instrument is done by calculating the score given by the validator and analyzing the validator's suggestions and input on the instrument product assessment questionnaire sheet in the form of a check list. The results concluded that the student practicum performance assessment instrument was feasible to use.

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