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All Journal JURNAL TEKNOLOGI LINGKUNGAN Green Earth EDUKASI SAINTIFIK@ : Jurnal Pendidikan MIPA JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Pengabdian UNDIKMA CLAPEYRON: Jurnal Ilmiah Teknik Sipil Jurnal Pendidikan Kimia Unkhair (JPKU)
Zulkifli Zam Zam
Pendidikan Kimia, FKIP, Universitas Khairun Ternate
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Nursing Public Health Social Sciences Transportation Other

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MODELING DYNAMIC SYSTEM FOR MANAGEMENT OF COASTAL AREA ECOSYSTEM OF KENJERAN TO HEAVY METAL CADMIUM (Cd) CONTAMINATION Hasan, Imron; Zam Zam, Zulkifli
Green Earth Vol 1, No 2 (2012)
Publisher : Green Earth

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (67.631 KB)

Abstract

The coastal area represents to a dynamic ecosystem, devided to the coastal land and coastal waters subsystem which each other interconnected. The ecosystem interconnected in environmental represents to a dynamic environmental systems process, where change that happened at one ecosystem will be influence and/or influenced by other ecosystem. The coastal area ecosystem of Kenjeran contaminated by heavy metal cadmium (Cd), its caused by development activity to both subsystem. To dissolve this problem, needed integrated and sustainable management of coastal area ecosystem with the system dynamic approach. This research aim are; (1) analysing amount heavy metals Cd from development activity (insudtrial) at Kenjeran channel, (2) analysing water, sediment quality at Kenjeran channel and water, sediment, bivalvia quality at Kenjeran estuary, and (3) modeling the management of coastal area ecosystem of Kenjeran with Vensim 5.0 software from High Performance System.Method of intake sample waters and sediment conducted to the integrated sampling system, while intake of sample bivalvia in Kenjeran estuary conducted to random. Hereinafter from concentration Cd data obtained, analysed by 2 way of, that is; (1) the statistically use ANOVA, and (2) comparing concentration Cd with water quality and industrial waste standard. Management of coastal area ecosystem of Kenjeran conducted to the system approach, modeling dynamic system to environmental, economic, and population aspect. From result obtained, that industrial waste of electroplating have the cadmium content of mean equaled to 0,0830 mg/ liter, waste of printing office industrial 0,0731 mg/liter, waste of plastic industrial 0,0060 mg/liter and waste of food indutrial 0,0066 mg/liter. The content of cadmium at stream water and sediment in channel of Kenjeran  are 0,0295 mg/liter and 3,8056 mg/liter. While, cadmium content in Kenjeran estuary to each component are 0,0327 mg/liter at sea water, 0,4816 mg/liter at sediment and 0,2081 mg/liter at bivalvia. Scenario simulation of Early Model (without environmental expense) economical profit equaled to Rp. 294.525.000, however, environmental aspect there is tendency to the environmental degradation of coastal area of Kenjeran equaled to Rp. 21.870.000 at the last simulation (20 year) and is not self-financing. So that local government will be non-stoped ladened with the environmental management costs equaled to Rp. 179.633.000. Population increased every year progressively which at the last simulation equaled to 286537 people. It also had contribution to degradation area equaled to Rp.3.581.710. While, result of scenario  simulation 1 (with the environmental expense) equaled to 20 %, yield the clean benefit value of economics activity equaled to Rp. 208.745.000 and the environmental degradation of became Rp. 2.551.420 at the last simulation (20 year). Keywords:  Management, The coastal area ecosystem of Kenjeran, Dynamic System, Cadmium (Cd).
RISK ASSESSMENT OF CLORINE GAS (CL2) AND METHANE (CH4) OF GARBAGE IN DKI JAKARTA USING THE EQC MODELLING AND AIR-WATER MODELING Zam Zam, Zulkifli
Green Earth Vol 1, No 1 (2012)
Publisher : Green Earth

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (67.631 KB)

Abstract

The garbage case nowadays become a main issue every where because it needs serious treatment. The dangers related to the characteristics of materials commonly used in households is the materials that contain chemical compounds amunium (CH4) and chlorine (Cl2). This research used the fugacity model approach from ChemCan model including EQC software model and Air-Water Model, in which the structure of the model meets the rules of contamination verification in chemical pathway. To complete the analysis of the impact, it used Material Safety Data Sheet (MSDS) and CAS Number. The results showed that the distribution of Cl 2 in TPA using Model AirWater  obtined the chlorine concentrations (Cl2) in the air is 1.5 x 10-5 g per m3, 4.32% aerosol, and water 0.015 g/m3. Cl2 compounds found in leachit is 0.015 g/m3 with the ability of evaporation (volatilization) into the air is 3.6 X 107 ug / day. For the distribution of CH4 using the EQC Model In TPA, the concentration of CH4 in the air (level 3) is smaller than in TPS at level 1 and level 2 is greater than, this is due to the TPA has a lot of CH4 reaction and advection into the environment. Reaction and advection in the air increase the amount of CH4 gas in the atmosphere that can cause global warming. Key word: Risk Assesment, Gas Clorine, Gas Metan, Sampah, EQC Model, Air Water Model.
DISTRIBUSI KONSENTRASI LOGAM BERAT (CU DAN CD) PADA SEDIMEN SUNGAI MENGGUNAKAN TEKNIK DIFFUSIVE GRADIENT IN THIN FILM = Distribution of Cu and Cd Concentration in the River using Diffusive Gradient in Thin Film Tehnique Nurhamiddin, Fauziah; Zam-Zam, Zulkifli
Jurnal Teknologi Lingkungan Vol. 14 No. 2 (2013)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (644.254 KB) | DOI: 10.29122/jtl.v14i2.1429

Abstract

DISTRIBUSI KONSENTRASI LOGAM BERAT (CUDAN CD) PADA SEDIMEN SUNGAI MENGGUNAKANTEKNIK DIFFUSIVE GRADIENT IN THIN FILM =Distribution of Cu and Cd Concentration in the River usingDiffusive Gradient in Thin Film TehniqueFauziah Nurhamiddin* dan Zulkifli Zam Zam*** Fakultas MIPA Universitas Muhammadiyah Maluku Utara** Program Studi Pendidikan Kimia Universitas Khairun TernateE-mail: zul_kifli79@ymail.comDiterima: 01 April 2013; Dikoreksi: 04 Mei 2013; Disetujui : 12 Mei 2013AbstractSediment in the bottom of the river has the potential as a store of inorganic compounds such as Cuand Cd, which are from human activities. The purpose of this research was to determine the typeand nature of the sediment contained in the river, to know the characteristics of the sediments andthe distribution of Cu and Cd concentrations in variations of the river sediment depth, as well as todetermine the concentration profiles of Cu and Cd in each sediment depth. The results showed thatthe type of sediment in the Brantas River can be classified into argillaceous sand. The concentrationof Cu and Cd in the second location is higher than in the first location. Cu metal concentrations insediments ranged from 0.0028 to 0.0922 ppm, and Cd metal concentration in the sediments rangedfrom 0.0022 to 0.2147 ppm .Brantas River sediments on both locations can be classified into fullysustained type which the sediments are able of to supply solutes into the pore water so that fluxsolute to pore water is equal to the flux solutes from pore water to prob DGT. This happens becausethe speed of diffusion of solutes from the solid particles sediment to pore water is equal to the speedof diffusion of solute from the pore water to prob DGT. Sediments at both locations can be includedin the category of fully unsustained. From these results, it can be concluded that the Brantas Riversediments have a role that is not functioning as a store of Cu and Cd metal because it is easy torelease metals into the river.Keywords: sediments, heavy metals, Cu, Cd, DGTAbstrakSedimen di bawah sungai berpotensi sebagai penyimpan senyawa anorganik seperti Cu dan Cd,yang berasal dari aktifitas manusia di sekitarnya. Tujuan penelitian ini adalah untuk mengetahuijenis dan sifat sedimen yang terdapat pada Sungai, mengetahui karakteristik sedimen dandistribusi konsentrasi Cu dan Cd dalam variasi kedalaman sedimen sungai, serta menentukan profilkonsentrasi Cu dan Cd pada tiap kedalaman sedimen. Hasil penelitian menunjukkan bahwa jenissedimen pada sungai Brantas dapat digolongkan kedalam pasir berlempung. Konsentrasi logamCu dan Cd pada lokasi II lebih tinggi dibandingkan dengan lokasi I. Konsentrasi logam Cu dalamsedimen berkisar antara 0,0028-0,0922 ppm, dan konsentrasi logam Cd dalam sedimen berkisar0,0022-0,2147 ppm Sedimen Sungai Brantas pada kedua lokasi penelitian dapat digolongkan padajenis fully sustained dimana sedimen mampu mensuplai solute kedalam air pori sehingga fluk soluteke pore water sama dengan fluk solute dari pore water ke prob DGT. Hal ini karena kecepatan diffusisolute dari partikel padat sedimen ke pore water sama dengan kecepatan diffusi solut dari pore wateke prob DGT. Sedimen pada kedua lokasi dapat dimasukkan dalam katagori fully unsustained. Darihasil penelitian ini dapat disimpulkan bahwa sedimen Sungai Brantas Hulu mempunyai peran yangtidak dapat berfungsi sebagai penyimpan logam Cu dan Cd di perairan.karena mudah melepaskanlogam kembali ke perairan.Kata kunci : Sedimen, Logam berat, Cu, Cd ,DGT
MASERASI DAN UJI AKTIVITAS IC50 ANTIOKSIDAN BUAH PINANG (Areca catechu) SECARA SPEKTROFOTOMETRI UV-VIS Zahara Sartika Dewi; Zulkifli Zam Zam; Khusna Arif Rakhman
SAINTIFIK@ Vol 1, No 1 (2017)
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (84.136 KB) | DOI: 10.33387/sjk.v1i1.328

Abstract

Penelitian ini bertujuan untuk menentukan kondisi maserasi optimal dan menguji aktivitas IC50 antioksidan buah pinang secara spektrofotometri UV-Vis. Prosedur dimulai dengan menyiapkan sampel pinang dengan tiga keadaan, kering, basah dan cair. Penentuan keadaan maserasi optimal dimulai dengan melakukan variasi pelarut dengan menggunakan pelarut akuades, metanol dan etanol, variasi waktu dengan waktu perendaman 10 menit, 30 menit, 60 menit, 120 menit, 240 menit, dan 600 menit, serta penentuan nilai IC50 antioksidan. Hasil penelitian menunjukkan pelarut dan keadaan yang optimal adalah akuades dan sampel kering dengan konsentrasi 95.772 ppm. Waktu optimal pada 240 menit dengan konsentrasi 2.93 ppm. Aktifitas antioksidan buah pinang sangat kuat dengan nilai IC50 sebesar 9.063µg/mL.
PENERAPAN MODEL PEMBELAJARAN SNOWBALL THROWING UNTUK MENINGKATKAN HASIL BELAJAR SISWA PADA MATERI STRUKTUR ATOM DI KELAS X SMA NEGERI 11 KOTA TERNATE Sisilia Taliawo; Zulkifli Zam Zam; St Hayatun Nur Abu
EDUKASI Vol 18, No 2 (2020): Edisi Juni 2020
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/j.edu.v18i2.2117

Abstract

This research was conducted to determine the increasing learning model of snowball throwing in students learning achievement on the subject matter of atomic structure in grade X of SMAN 11 Kota Ternate amounting to 15 students. The sample of this research was students grade X that was taken by saturated sampling. The instrument used in this research is essay consist of 9 items to use for quantifying students learning achievement. The technique of data analysis through inferential statistics analysis by using spss 21. The result shows that there are improvements in students learning achievement in grade X of SMAN 11 Kota Ternate on the subject matter of atomic structure based on the hypotheses by t count ˃ t table or 14,140 ˃ 2,144. The gain value was 0,30 shows the was on interpretation of students learning achievement.
Nitrate Adsorption capacity of Activated Gamalama Volcanic Ash Zulkifli Zam Zam; Nur Asbirayani Limatahu; Nur Jannah Baturante
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 6, No 1 (2021): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v6i1.48462

Abstract

The adsorption process of nitrate from an aqueous solution by using activated Gamalama volcanic ash was investigated. Gamalama volcanic ash (VA) was activated with HNO3 2M. The effect of adsorbent mass and initial nitrate concentration on nitrate adsorption were observed in this study. The adsorption process was conducted using a various mass of adsorbent (1 g, 2 g, 4 g, 6 g, and 8 g), various initial concentrations of nitrate (20 mg/L, 30 mg/L,40 mg/L, 50 mg/L, and 60 mg/L). The increasing of adsorbent mass decreased the adsorption capacity was observed. It was also found that the increase in initial concentration increased the adsorption capacity. The highest nitrate adsorption capacity showed by 1 gram adsorbent for 0.167 mg/g, and at nitrate initial concentration 80 mg/L, for 1.831 mg/g. Adsorption isotherm of nitrate on activated VA was determined and figured. These isotherms were modelled according to Freundlich and Langmuir adsorption isotherm.
Penerapan Model Pembelajarn Kooperatif Tipe Numbered Heads Together (NHT) Untuk Meningkatkan Hasil Belajar Siswa Kelas Xi Pada Materi Asam Basa Di SMA Negeri 3 Kepulauan Sula Fitri Amrin; Zulkifli Zam Zam; Fitriana Ibrahim; Elsa Sri Wahyuni; Dira Ayu Annisa; Ilham SW Mauraji
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Publisher : Jurnal Pendidikan Kimia Unkhair (JPKU)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jpku.v3i1.6406

Abstract

Abstrak Penelitian ini bertujuan untuk mengetahui Penerapan Model Pembelajaran Kooperatif Tipe Numbered Heads Together (NHT) Untuk Meningkatkan Hasil Belajar Siswa Kelas XI Pada Materi Asam Basa Di SMAN 3 Kepulauan Sula. Jenis penelitian yang digunakan adalah jenis penelitian eksperimen dengan desain one group pretest posttest. Sampel dalam penelitian sebanyak 19 siswa kelas XI IPA SMA Negeri 3 Kepulauan Sula menggunakan teknik sampling jenuh. Instrumen yang digunakan pada penelitian ini berupa soal essay sebanyak 10 item untuk mengukur hasil belajar siswa dan lembar observasi untuk mengukur ranah afektif dan psikomotorik. Teknik analisis data statistik inferensial menggunakan SPSS 21.0 hasil penelitian menunjukkan bahwa terdapat pengaruh pada penerapan Model Pembelajaran Kooperatif Tipe Numbered Heads Together (NHT) Untuk Meningkatkan Hasil Belajar Siswa Kelas XI Pada Materi Asam Basa Di SMAN 3 Kepulauan Sula dengan hasil uji hipotesis diperoleh ttabelthitung atau 13,7191,734, sedangkan hasil analisis ranah afektif mencapai 73 dan ranah psikomotorik 75.Kata Kunci:  Model kooperatif,tipe numbered heads together, pengaruh hasil belajar, asam basa.Abstract This study aims to determine the Application of the Numbered Heads Together (NHT) Cooperative Learning Model to Improve Student Learning Outcomes in Class XI on Acid-Base Material at SMAN 3 Sula Islands. The type of research used is a type of experimental research with a one group pretest posttest design. The sample in the study was 19 students of class XI IPA SMA Negeri 3 Sula Islands using a saturated sampling technique. The instruments used in this study were essay questions of 10 items to measure student learning outcomes and observation sheets to measure affective and psychomotor domains. The inferential statistical data analysis technique using SPSS 21.0 showed that there was an influence on the application of the Numbered Heads Together (NHT) Type Cooperative Learning Model to Improve Student Learning Outcomes in Class XI on Acid-Base Material at SMAN 3 Sula Islands with the results of hypothesis testing obtained ttable tcount or 13.719 1.734, while the results of the analysis of the affective domain reached 73 and the psychomotor domain was 75.Keywords: Cooperative models, numbered heads together, the effect of learning outcomes, acid base
Analisis Kemampuan Belajar Siswa Kelas XI Ipa II SMA Negeri 3 Kota Ternate Pada Materi Hidrokarbon Harun, Nur Afiyanti; Zam, Zulkifli Zam; Mauraji, Ilham SW; Amin, Muhammad
Jurnal Pendidikan Kimia Unkhair (JPKU) Vol 4, No 2 (2024): Jurnal Pendidikan Kimia Unkhair (JPKU)
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jpku.v4i2.9274

Abstract

AbstrakNur Afiyanti Harun, 2024. Analisis Kemampuan Belajar Siswa Kelas XI Ipa 2 SMA Negeri 3 Kota Ternate. Dibawah biimbingan Zulkifli Zam Zam dan Ilham Mauraji.Penelitian ini dilakukan untuk mengetahui kemampuan  belajar siswa dan faktor-faktor yang mempengaruhi kemampuan belajar siswa kelas XI Ipa 2 SMA Negeri 3 Kota Ternate dalam materi hidrokarbon. Jenis penelitian ini adalah penelitian deskriptif. Populasi dalam penelitian adalah seluruh siswa kelas XI Ipa 2 SMA Negeri 3 Kota Ternate  yang berjumlah 20 siswa yang tersebar dalam 1 kelas. Teknik pengambilan sampel yang digunakan adalah sampling jenuh, instrumen dalam penelitian ini yaitu menggunakan instrumen tes dan nontes, berupa essay yang berjumlah 10 item soal dan angket berjumlah 15 item pernyataan. Hasil analisis menunjukan bahwa rata-rata kemampuan belajar Lots siswa kelas XI Ipa 2 SMA Negeri 3 Kota Ternate dalam mempelajari materi hidrokarbon berada pada kategori rendah dengan presentase 85% dan sebagian kecil berada pada kategori tinggi dengan presentase 15%. Begitupun dengan kemampuan Hots siswa kelas XI Ipa 2 SMA Negeri 3 Kota Ternate dalam mempelajari materi hidrokarbon berada pada kategori sangat rendah dengan presentase 85% dan sebagian kecil berada pada kategori tinggi dengan presentase 15%. Dari 20 siswa yang dijadikan sampel. Faktor yang mempengaruhi kemampuan belajar siswa adalah faktor internal siswa terdapat pada aspek minat,sikap,motivasi dan intelegensi. Intelegensi dengan presentase 70% pada kategori tinggi, minat 55% sikap 55% dan motivasi 50%. Dan faktor eksternal adalah perhatian orangtua dengan presentase 70%, berada pada kategori tinggi, metode guru 65%, kualitas guru 65% dan fasilitas sekolah 65%. AbstractNur Afiyanti Harun, 2024. Analysis of Learning Ability of Class XI Ipa 2 Students of SMA Negeri 3 Kota Ternate. Under the guidance of Zulkifli Zam Zam and Ilham Mauraji.This study was conducted to determine the learning ability of students and the factors that influence the learning ability of students in class XI Ipa 2 SMA Negeri 3 Kota Ternate in hydrocarbon material. This type of research is descriptive research. The population in the study were all students of class XI Ipa 2 SMA Negeri 3 Kota Ternate which amounted to 20 students spread over 1 class. The sampling technique used was saturated sampling, the instruments in this study were using test and non-test instruments, in the form of essays totaling 10 question items and questionnaires totaling 15 statement items. The results of the analysis showed that the average Lots learning ability of students in class XI Ipa 2 SMA Negeri 3 Kota Ternate in learning hydrocarbon material was in the low category with a percentage of 85% and a small percentage was in the high category with a percentage of 15%. Likewise, the ability of Hots students of class XI Ipa 2 SMA Negeri 3 Kota Ternate in learning hydrocarbon material is in the very low category with a percentage of 85% and a small percentage is in the high category with a percentage of 15%. Of the 20 students sampled. Factors that affect students' learning abilities are internal factors of students in the aspects of interest, attitude, motivation and intelligence. Intelligence with a percentage of 70% in the high category, interest 55% attitude 55% and motivation 50%. And external factors are parental attention with a percentage of 70%, in the high category, teacher methods 65%, teacher quality 65% and school facilities 65%. 
Desain Teknis Pengembangan Sistem Penyediaan Air Minum Kota Sofifi Berbasis Epanet 2.2 syafruddin, syafruddin; Gaus, Abdul; Zam zam, Zulkifli
CLAPEYRON: Jurnal Ilmiah Teknik Sipil Vol 5, No 1 (2024): CLAPEYRON : JURNAL ILMIAH TEKNIK SIPIL
Publisher : Program Studi Teknik Sipil, Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/clapeyron.v5i1.7713

Abstract

Pemindahan   pusat   pemerintahan   dan  seluruh   aktivitas  penyelenggaraan pemerintahan Kota Sofifi dari Kota Ternate berdampak pada tingginya permintaan terhadap ketersediaan fasilitas kebutuhan dasar manusia, mengakibatkan masalah belum optimalnya sistem penyediaan air minum (SPAM). Rencana desain teknis pengembangan sistem penyediaan air minum di Sofifi dilakukan dengan menggunakan metode deskriptif  melalui  pengumpulan data, analisis data, dan Detail Engineering Design (DED). Hasil penelitian menunjukkan bahwa dengan melakukan interkoneksi jaringan distribusi pusat operasi Gosale dan Ampera, untuk rencana pengembangan SPAM Kota Sofifi dalam kurun waktu 15 tahun kedepan. Perhitungan kebutuhan air dengan jumlah penduduk pada tahun 2037 sebesar 22.182 jiwa, maka kapasitas sumber air sungai Kaiyasa dan sungai Oba sebesar 0,107 m3/detik dapat memenuhi, dimana kebutuhan air rata-rata sebesar 30,52 liter/detik. sedangkan kebutuhan air maksimum sebesar 33,57 liter/detik dan kebutuhan air pada saat jam puncak sebesar 41,20 liter/detik. Simulasi hidrolis optimalisasi jaringan dengan debit perencanaan menggunakan Software Epanet 2.2, juga diperoleh pola pelayanan yang lebih teratur dan skema desain mampu memenuhi kebutuhan air pada saat pemakaian puncak.
PENGARUH MODEL PROBLEM BASED LEARNING TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA KELAS X PADA MATERI IKATAN KIMIA DI SMK NEGERI 9 KEPULAUAN SULA Daiman, Fanina; Amin, Muhammad; Mauraji, ilham SW; Zam, Zulkifli Zam; Ibrahim, Fitriana; Baturante, Nur Jannah
Jurnal Pendidikan Kimia Unkhair (JPKU) Vol 4, No 1 (2024): Jurnal Pendidikan Kimia Unkhair (JPKU)
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jpku.v4i1.8406

Abstract

 Informasi Jurnal Kata Kunci:                Problem Based Learning, Kemampuan Berpikir Kritis, Ikatan KimiaAbstrakPenelitian ini dilakukan untuk mengetahui pengaruh model problem based learning terhadap kemampuan berpikir kritis siswa kelas X pada materi ikatan kimia di SMK Negeri 9 Kepulauan Sula. Jenis penelitian ini yang digunakan adalah penelitian eksperimen dengan desain penelitian yaitu One Group Pretest Posttest Desain. Populasi dalam penelitian ini adalah kelas X berjumlah 14 siswa teknik pengambilan sampel yaitu sampling jenuh. Instrumen yang digunakan berupa soal essay sebanyak 10 nomor. Data yang diperoleh selanjutnya dianalisis mengunakan SPSS 21.0. Hasil uji hipotesis dalam penelitian ini diperoleh dari uji Paired Sampel T Test thitungttabel atau 7,5151,770, maka Ha diterima dan H0 ditolak. Sehingga model pembelajaran peoblem based learning berpengaruh terhadap kemampuan berpikir kritis siswa dengan besar pengaruh yang diperoleh dari uji nilai sebesar 0,35 dengan kategori sedang.    Keyword:Problem Based Learning, Critical Thinking Ability, Chemical BondsAbstractThis research was conducted to determine the effect of the problem based learning model on the critical abilities of class X students on chemical bonding material at SMK Negeri 9 Sula Island. The type of research used experimental research with a research design, namely One Group Pretest Posttest Design. The population in this study was class X, totaling 14 students, the sampling technique was saturated sam pling. The instrument used is 10 essay questions. The data obtained was then analyzed using SPSS 21.0. The results of the hypothesis test in this research were obtained from the Paired Sample T Test tcount ttable or 7.5151.770, so Ha was accepted and Ho was rejected. So the problem based learning model influences students critical thinking abilities with a large influence obtained from the test value of 0.35 in the medium category..
Co-Authors -, merlin Ahmad Muchsin Jayali Amin, Muhamamd Amrin, Fitri Annisa, Dira Ayu Baturante, Nur Jannah Cipta, Indra Daiman, Fanina Dira Ayu Annisa Elsa Sriwahyuni Fadlan Muin Farida Samad Fitri Amrin Fitriana Ibrahim Gaus, Abdul Harun, Nur Afiyanti Ibrahim, Fitriana Ilham SW Mauraji Imron Hasan Khusna Arif Rakhman Khusna Arif Rakhman, Khusna Arif Lek, Hajija Liestianty, Deasy Limata, Nur Asbirayani Mauraji, Ilham SW Muhammad Amin Mujahidah, Ummahatul MULIADI -, MULIADI Nur Asbirayani Limatahu Nurhamiddin *, Fauziah Nurjanah Baturante Rita Samad Saleh, Rosani M. Hi. Saraha, Abdul Rasid Sisilia Taliawo St. Hayatun Nur Abu Sudir Umar Syafruddin Syafruddin Torano, Iklima Hi. Ismail Wahyuni, Elsa Sri Zahara Sartika Dewi