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JKPK (Jurnal Kimia dan Pendidikan Kimia)

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Published by Universitas Sebelas Maret

ISSN : 25034146 EISSN : 25034154 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

The JKPK (Jurnal Kimia dan Pendidikan Kimia) is a national journal, published three times a year in April, August, and December, containing research articles on Chemistry and Chemistry education.

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Articles 218 Documents

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Concentration Conditions of Carbon Dioxide in Bukittinggi During the Event of El Niño 2015 Martono Martono; Ninong Komala
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 3 (2018): JKPK( Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

In 2015, about 2.61 million ha of land and forests in Indonesia were on fire and indicated will increase the amount of CO2 emitted into the atmosphere. The purpose of this study was to understand the condition of CO2 concentration at Bukittinggi during El Niño 2015. The data used was the data of Kototabang CO2 concentration, NINO3.4 index and chlorophyll-a concentration from 2004-2016. The results showed that CO2 concentration at Bukittinggi from 2004-2016 was increased of about 2.4 ppm/year. CO2 concentration in the first transition season (March-May) and the east season (June-August) 2015 were approximately 397 and 395 ppm, respectively, lower than that in 2016 on the same months which was about 401 and 397 ppm, respectively. In the second transition season (September-November) in 2015, CO2 concentration reached 401 ppm which was higher than that in 2016 which was only 397 ppm. In 2015, chlorophyll-a concentration in the southern waters of Java increased about 14% in the east season and reached 50% during the second transition season. Therefore, small increase of CO2 concentration during El Niño 2015 was indicated as a result of high uptake of CO2 by the sea for photosynthesis needs.

Implementation of Item Response Theory for Analysis of Test Items Quality and Students’ Ability in Chemistry Rizki Nor Amelia; Kriswantoro Kriswantoro
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 2, No 1 (2017): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This first aim of this study is to describe the quality of chemistry test item made by teacher. The test was developed for 11th grade students’ science class in the first semester on academic year 2015/2016. The second aim of this study is to describe the characteristic of measurement’s result for students’ ability in chemistry. This is descriptive research design with the 101 student’s responses patterns from multiple choice test device with 5 answer alternatives. The responses patterns were collected by documentation technique and analyzed quantitatively using Item Response Theory software such as BILOG MG V3.0 with 1-PL, 2-PL, and 3-PL models. The differences of students’ ability in chemistry in model 1-PL, 2-PL, dan 3-PL were analyzed using One-Way Anova Repeated Measure. The result showed that the mean of item difficulties level (b), item differentiate (a), and pseudo-guessing (c) are good. The measurement tools arranged by teacher were suitable for students who have the ability from -1.0 to +1.7. The maximum score of item information function is 68.83 (SEM =0.121) with ability in 0.2 logit. The highest ability’s estimation score was showed by Model 2-PL. The mean of students’ ability for 11th grade students is -0.0185 logit and consider as moderate category.

Characterization and Antibacterial Activity Test of Hydroxyapatite (HAp) from Chicken Eggshell against Lactobacillus acidophilus Bacteria Imelda Wadu; Hartati Soetjipto; Margareta Novian Cahyanti
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 2, No 3 (2017): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

The purposes of this study were to characterize Hydroxyapatite (HAp) bioceramics which synthesized from local chicken and broiler eggshell using FTIR, and to determine HAp antibacterial activity with the highest content of calcium-phosphate (HAp from broiler chicken eggshell) using paper disc method. Characterization of HAp from local chicken eggshell using FTIR showed peaks for PO43- functional group on the wavelength 1040.08, 608.46 and 568.67 cm-1; OH- functional group on the wavelength 3426.39 and 2880.46 cm-1; CO2 functional group on the wavelength 2142.91 cm-1; and CO32- functional group on the wavelength 1653.64 cm-1. Whereas broiler chicken eggshell HAp showed peaks for PO43- functional group on the wavelength 1044.40, 604.13 and 568.66 cm-1; OH- functional group on the wavelength 3419.61 and 2838.35 cm-1; CO2 functional group on the wavelength 2086.69 cm-1; and CO32- functional group on the wavelength 1653.64 cm-1. HAp antibacterial activity test against caries bacteria L. acidophilus gives the positive results either for the lowest test dose (5μg/μL) or the highest test dose (75μg/μL), which was characterized by the formation of diameter inhibitory area 22.93±0,066 and 33.08±0,031 mm (strong category of >20 mm), respectively. The characterization of HAp from local chicken and broiler chicken eggshell using FTIR confirmed the presence of HAp compounds, and the antibacterial activity test result of HAp synthesized from broiler chicken eggshell indicates a positive and strong antibacterial power.

Study of Humic Acid Adsorption Equilibrium on Dual Nanofiber PMMA/PVDF Muhammad Ali Zulfikar; Afdal Bahri; Muhamad Nasir
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 1 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

The main objective of this study is to investigate the isotherm sorption of humic acid (HA) from aqueous solution onto dual nanofiber PMMA/PVDF. Batch adsorption experiments were carried out using HA solution as an adsorbate under variety of concentration in the range of 50-200 mg/L. The experimental data were analyzed by the Langmuir, Freundlich and Sips models of adsorption. The experimental results indicate that, the adsorption capacity of HA adsorption increases with an increase in the HA concentrations. The adsorption of HA onto dual nanofiber PMMA/PVDF agrees well with the Langmuir isotherm models with the maximum adsorption capacity was found to be 137.40 mg g-1 at concentration of 100 mg L-1.

Conceptual Understanding Analysis Through Two-Tier Model Diagnostic Tests on Acid-Base Materials Sintia Ayu Dewi; Endang Susilaningsih; Triastuti Sulistyaningsih
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 3 (2018): JKPK( Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This research aims to organize instrument of computer-based two-tier multiple choices diagnostic test. The research method used was quantitative and qualitative method. This research was conducted in class XI MIPA 3 and XI MIPA 4, Senior High School 1 Ungaran. The research procedure was designed starting from selecting the difficult subjects, arranging test plan, designing two-tier model of diagnostic test, designing web, tryout, analysis of tryout data, diagnostic test, interview, and analysis of concept understanding. The finding of the research that the instrument was valid and reliable. The result of students’ concept understanding of acid-base on implementation class showed that 9 of 35 students (26.86%) understood the concept thoroughly, 4 of 35 students (8.43%) got misconception, 1 of 35 students (3.71%) kept guessing, 12 of 35 students (34.86%) grasped less understanding while 9 of 35 students (26.14%) did not understand the concept of Acid-Base. The inference drawn of this recent study is that computer-based two-tier diagnostic test instrument can be used to analyze students’ concept understanding about acid-base by combined interpretation of students’ answers with several categories of concept understanding, misconception, guessing, less understanding of the concept, and failure to understand the concept.

The Effect of Rainwater Quality on The Methane Concentration Lilik S. Supriatin; Waluyo E. Cahyono; Syafrizon Syafrizon
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 2, No 2 (2017): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Research on the effect of pH of rainfall on the emission of methane (CH4) has been made. And what about the influence of the pH of rainfall at a concentration of CH4? That question will be answered through this research. The problem in this research is not yet known and the effect of the interaction of water quality in these clouds pH (degree of acidity) of rain on the concentration of CH4. The purpose of the study was the first object to determine acid rain in research location and to determine and analyze the influence of the pH of rainfall on the CH4 concentration. The research location is at Balai Pengamat Atmosfer dan Antariksa LAPAN in Kototabang hills, West Sumatra. The data used in this study is the pH of rainfall and CH4 concentrations. The analytical method used is the analysis of statistical and descriptive analysis. The results showed a correlation coefficient between the pH of rainfall with CH4 concentration of 0,87. The correlation coefficient indicates that the effect of the pH of rainfall is linearly proportional to the concentration of CH4. This means that the pH of rainfall is higher, then the CH4 concentration will increase.

The Implementation of Problem-Solving Model Using Concept Mapping Strategy to Increase Students’ Interest and Learning Achievement at the Lintas-Minat Chemistry Class Heri Setyoko; Sri Mulyani; Sri Yamtinah
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 2, No 3 (2017): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This Classroom Action Research (CAR) aims to improve students’ interest and achievement in learning in the eleventh grade students of lintas-minat Chemistry 1 of SMA Negeri 2 Surakarta in academic year 2015/2016 by implementing the learning model of problem-solving using mapping concept strategy in buffer solution subject matter. This CAR was carried out in two cycles and in each cycle there was four stages consisting of action planning, action implementation, observation, and reflection. Data of interest aspect and attitude aspect of learning achievement were collected through observations, questionnaires, and interviews techniques. Data of knowledge aspect and skill aspect of learning achievement were collected using test and observation techniques, respectively. The research data were analyzed using qualitative descriptive technique. The results of this research can be concluded that the implementation of problem-solving learning model using concept mapping strategy can increase the eleventh grade students’ interest and achievement in the learning subject matter of buffer-solution at the Lintas-Minat Chemistry 1 class of SMA Negeri 2 Surakarta. The achievement percentage of students’ interest aspect in the first cycle is 55% and the second cycle increases to 80%. The learning achievement of knowledge aspects increases from 60% in cycle I to 80% in the second cycle. The learning achievement of attitude aspect (spirituality, honesty, responsibility, and cooperation) reached 100% in cycle I with unfinished cooperation indicator and 100% in cycle II with completed of cooperation attitude indicator. For learning achievement in skill aspect in cycle I has reached 100%.

Study of Solvent Mixture of Aqua destillata–Acetone in the Making of Cellulose Propionate Membrane Budi Kamulyan; Uswatun Hasanah; Febrian Matulesi
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 2 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

In this article we will discuss the solubility test of cellulose propionate on various ratio variations of aqua destillata–acetone. Previously cellulose propionate was dispersed into a solvent mixture of aqua destillata-acetone. Variation in volume ratio of aqua destillata–acetone was 4: 1; 3: 1; 2: 1; 1: 2; 1: 3, and 1: 4. The mixture is stirred for 48 h and filtered. The solid was then put into a mold with a sintering technique at a temperature of 100oC for 5-10 minutes. Membrane characterization includes solubility parameters (δmix), density using picno meter and calculation of sample dimensions, and swelling index. The results of the calculation of solubility parameters (δmix) solvent mixture of aqua destillata–acetone (1: 4) close to δ cellulose acetate (12.47). Differences in membrane density using picno meter and calculations in dimensions indicate the presence of cavities or pores in the membrane. Difference in density value of both calculations occurs in the membrane with a mixture of aqua destillata–acetone (1: 3). The highest hydrophobicity properties were obtained in the ratio of solvents of destillata–acetone (1: 4) with the smallest swelling index (48.14%).

Mesoporous Carbon in the Global World Maria Ulfa
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 2, No 1 (2017): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This review provided information about the development of the synthesis aspect, preparation and application of mesoporous carbon in the global world based on research phenomenon on 100 mesoporous carbon papers published by Elsevier, ACS dan Springer during 25 year. Review results showed that researchers began to leave sucrose and switch to non-sucrose as carbon precursor. Researchers used sucrose about 90% in 1995-2000 and in 2010-2015 decrease to become 40%. Otherwise those using non-sucrose in 1995-2000 only 10%, recently increase to 60%. For the method used to synthesis the mesoporous carbon researchers prefer used soft template (about 75 %) before year 2000 and hard template (about 60%) in 2000-2010, but now the method used with soft templates, hard templates and combinations of both are balanced. From year 1995 until 2015 total researchers used sucrose as carbon precursor about 50% and researchers about 40% using hard template method, 35% using soft template method and the others using combination both of them. Structure form of the amorphous carbons are grown, from wormholes, cubic, until hexagonal, and modification to these fours forms. Physical properties such as pore size, surface area, and structural order were developed for better performance year to year. Mesoporous carbon application up to 60% were used in the fuel production and refineries, but the other using on the communication tenhnologies and medical areas. All of the mesoporous carbon in the global world shows that mesoporous carbon is a future material which has a great opportunity to develop especially in Indonesia and other developing countries. Indonesia have various natural resources as a carbon source, so in the future Indonesia are expected as one of the countries of mesoporous carbon supplier

Development of Interactive Chemistry Learning Devices using Domino Chemical Media in terms of Student Activity and Learning Outcomes of Class X High School in Samarinda Medita Hermawanti; Mukhamad Nurhadi; Abdul Majid
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 2 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

This research focuses on research and development of learning devices using Chemical Domino media. The product of this research is Interactive Chemical Domino learning media, which focused on compound nomenclature material for class X which is expected feasible to be used as learning media. The subjects in this study are divided into 2 stages, the first is the small group test in which only 12 students from SMA Negeri 1 Samarinda participate. The second is field test (large group) which 96 students from 3 high schools participate, namely SMA Negeri 1 Samarinda, 36 students from Madrasah Aliyah Negeri 2 Samarinda, and 36 students from SMA Negeri 5 Samarinda. The results showed that the validation of media experts scored 85.77%, material expert validation scored 88.63%. In learning media validation, it showed that validation of RPP scored 92.08%, LKS validation scored 92.67%. For student response results scored 81.25%. From those scores it can be concluded that development of learning device using Media Chemical Domino is "very good”. Meanwhile for the observation results of student activity increased up to 33.71% and for student learning results from posttest and daily test reach KKM with percentage of student learning result 77,34%.

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