Pengembangan Media Pembelajaran PowerPoint Interaktif Berbasis Inkuiri Terbimbing pada Materi Larutan Elektrolit dan Nonelektrolit Kelas X SMA/MA

Electrolyte and nonelectrolyte solutions are one of the materials in SMA/MA class X chemistry. The materials of electrolyte and nonelectrolyte solutions can be understood well through their macroscopic, submicroscopic, and symbolic representations. This study aims to develop interactive PowerPoint learning media based on guided inquiry on electrolyte and nonelectrolyte solution material for class X SMA/MA which is in accordance with the characteristics of the material and the demands of the 2013 curriculum. (define, design, develop, and disseminate). This research is limited to the develop stage. Testing the validity and practicality of interactive PowerPoint learning media based on guided inquiry on electrolyte and nonelectrolyte solution material using an instrument in the form of a questionnaire. The subjects of the validity test of this interactive PowerPoint learning media were three chemistry department lecturers and two MAN chemistry teachers. The practicality test subjects of this interactive PowerPoint learning media were two MAN 5 chemistry teachers and twenty MAN 5 Mandailing Natal students. The data obtained from the questionnaire were processed using the kappa moment to obtain the k value of each validity and practicality test item. The interactive learning media of electrolyte and nonelectrolyte solutions produced in this study had a validity k value of 0.86 and practicality by teachers and students obtaining k values of 0.895 and 0.89, with very high criteria of validity and practicality. Larutan elektrolit dan nonelektrolit merupakan salah satu materi dalam kimia SMA/MA kelas X. Materi larutan elektrolit dan nonelektrolit dapat dimengerti dengan baik melalui representasi makroskopik, submikroskopik, dan simboliknya. Penelitian ini bertujuan untuk mengembangkan media pembelajaran PowerPoint interaktif berbasis inkuiri terbimbing pada materi larutan elektrolit dan nonelektrolit kelas X SMA/MA yang sesuai dengan karakteristik materi dan tuntutan kurikulum 2013. Penelitian yang dilakukan termasuk jenis penelitian pengembangan (research and development) dengan model 4-D (define, design, develop, dan disseminate). Penelitian ini dibatasi sampai tahap develop. Pengujian validitas dan praktikalitas media pembelajaran PowerPoint interaktif berbasis inkuiri terbimbing pada materi larutan elektrolit dan nonelektrolit menggunakan instrumen berupa angket. Subjek uji validitas media pembelajara PowerPoint interaktif ini adalah tiga orang dosen jurusan kimia dan dua orang guru kimia MAN. Subjek uji praktikalitas media pembelajaran PowerPoint interaktif ini adalah dua orang guru kimia MAN 5 dan dua puluh orang siswa MAN 5 Mandailing Natal. Data yang dihasilakan dari angket diolah memakai momen kappa untuk memperoleh nilai k setiap item uji validitas dan praktikalitas. Media pembelajaran interaktif larutan elektrolit dan nonelektrolit yang dihasilkan pada penelitian ini memiliki nilai k kevalidan 0,86 dan kepraktisan oleh guru dan siswa memperoleh nilai k 0.895 dan 0.89, dengan kriteria kevalidan dan kepraktisan sangat tinggi.

Efektivitas Modul Larutan Elektrolit dan Nonelektrolit berorientasi Chemistry Triangle terhadap Hasil Belajar Peserta Didik

Electrolyte and nonelectrolyte solution module oriented to chemistry triangle have been experimented using a randomized pretest-posttest control group design. This study goals to reveal the level of effectiveness of electrolyte and nonelectrolyte solution module oriented to chemistry triangle on learning outcomes of class X MIA at SMAN 15 Padang. Research instruments is multiple choice tests that have been valid, reliable, differentiating power, and indexing difficulties that could measure student learning outcomes. The level of effectiveness of electrolyte and nonelectrolyte solution module oriented to chemistry triangle is known through the N-gain test. N-gain test results with a value of g=0.46 states that electrolyte and nonelectrolyte solution module oriented to chemistry triangle is effective in improving student learning outcomes on medium criteria.

Pengembangan Bahan Ajar Interaktif Berbasis Website Pada Topik Larutan Elektrolit dan Non Elektrolit

This study aims to know the feasibility of an interactive learning material based on a website that innovated based on BSNP. The research method used Research and Development (R&D) with the ADDIE models which consist of five stages are analysis, design, development, implementation, and evaluation. Data collected technique used for feasibility was a questionnaire of BSNP was given to experts lecture. The analysis results of this research are the interactive learning material based on the website was feasible that used questionnaire of BSNP showed a score of the truth, breadth, and depth of concept aspects was 4.66, material and question device aspects was 4.56, language structure aspects was 5.0, display of media aspects was 4.83, software engineering aspects was 4.33, usefulness aspects was 4.66. The average score overall validation of interactive learning material based on the website on the electrolyte and nonelectrolyte solution topic was 4.67. The average score overall validation of interactive learning material based on the website on the electrolyte and nonelectrolyte solution topic shows that this media is very eligible and can be used in the learning process.

VALIDITY OF COMPUTER-BASED ELECTROLYTE FISHER GAME TO DEVELOP PROBLEM-SOLVING SKILL OF STUDENTS IN ELECTROLYTE AND NONELECTROLYTE SOLUTION

The aim of this research was to get a valid computer-based Electrolyte Fisher game to develop problemsolving skill of students on electrolyte and nonelectrolyte solution topics so it could be used in learningactivity. The type of this research was development research by using 4D model with four stages includingdefine, design, develop, and disseminate, but the stages carried out in this research only until developmentstage. Validity was determined by two chemistry lecturers and one chemistry teacher. Research resultsproved that Electrolyte Fisher game was valid based on content validity percentage of 84.44% and constructvalidity percentage of 85.37%. There were three criteria assessed in content validity including thecorrectness of concepts in matter obtaining a percentage of 86.67%; the suitability of matter with learningobjectives obtaining 86.67%; and the suitability of game with problem-solving skill component obtaining80.00%. There were two criteria assessed in construct validity, namely the suitability of game with learningmedia requirements which included nine aspects obtaining percentage of 87.78% and the suitability ofdisplay quality in game which included three aspects obtaining 82.96%. Based on results of this researchshowed that the computer-based Electrolyte Fisher game to develop students’ problem-solving skill wasdeclared valid.Key words: electrolyte fisher game, problem-solving skill, electrolyte, and nonelectrolyte solution.

Differences in Learning Outcomes of Chemistry through Cooperative Learning Model Type Make a Match and Numbered Head Together on the Material of Electrolyte and Nonelectrolyte Solution of Students Class X in SMA Negeri 9 Palu

Application of learning model is expected to build good communication between students with teachers and students with students in an effort to improve understanding of a concept. This study aimed to determine the differences in the learning outcomes of chemistry through cooperative learning model type make a match and numbered head together in the material of electrolyte and nonelectrolyte solution of students class X SMA Negeri 9 Palu. This type of research was pre-experimental with the static group pretest-posttest design. The sample used in this research was the students of class Xa (n = 23) as the first experiment 1 and students of class Xb (n = 23) as the second experiment 2 with. The result of data analysis obtained, the mean value of the experiment class 1 was 74.24 and in the experiment class 2 was 67.28. The result of hypothesis testing with t-test statistic on two side was obtained - ttable ≤ tcount ³ + ttable that was (-1.68 <3.27> +1.68 with significant level (α = 0.05) and degrees of freedom = 44. This indicates that H0 was rejected and Ha was accepted so that it can be concluded that there are differences in the students’ learning outcomes of chemistry through cooperative learning model type make a match and numbered head together in the material of electrolyte and nonelectrolyte solution of class X SMA Negeri 9 Palu.

DESAIN DAN UJI COBA MODUL KIMIA BERORIENTASI GREEN-CHEMISTRY PADA MATERI LARUTAN ELEKTROLIT DAN NONELEKTROLIT

This research aimed at designing Green-Chemistry-oriented Chemistry module on Electrolyte and Nonelectrolyte Solution lesson that was valid based on validity media expert, lesson expert, teacher practicality, and student response. It was Research and Development (R&D) research that implemented Borg and Gall Development model. It was administered at the eleventh-grade students of MIPA 1 of State Senior High School 1 Kampar. The instruments of collecting the data were validity test questionnaire by the experts, teacher practicality test questionnaire, and student response questionnaire. The collected data were analyzed by using Descriptive qualitative and quantitative analysis techniques. The module could be stated appropriate, if it passed validity and practicality aspects. The validity result of chemistry module by 2 media experts and a material expert was 87.09% and it was on very valid category. Practicality test of 3 Chemistry subject teachers showed a result 87.84% that was on very practical category, and it was obtained a very positive response from 10 students, it could be seen from questionnaire result 90.78%. Based on these results, it could be identified that Green-Chemistry-oriented Chemistry module on Electrolyte and Nonelectrolyte Solution lesson was appropriate and practical to be an additional teaching material for teachers at a school.Keywords:Module, Green-Chemistry, Electrolyte and Nonelectrolyte Solution.

Diffusiophoresis of a Colloidal Cylinder at Small Finite Péclet Numbers

The diffusiophoretic migration of a circular cylindrical particle in a nonelectrolyte solution with a solute concentration gradient normal to its axis is analytically studied for a small but finite Péclet number . The interfacial layer of interaction between the solute molecules and the particle is taken to be thin, but the polarization of its mobile molecules is allowed. Using a method of matched asymptotic expansions, we solve the governing equations of conservation of the system and obtain an explicit formula for the diffusiophoretic velocity of the cylinder correct to the order . It is found that the perturbed solute concentration and fluid velocity distributions have the order , but the leading correction to the particle velocity has the higher order . The correction to the particle velocity to the order can be either positive or negative depending on the polarization parameter of the thin interfacial layer, establishing that the solute convection effect is complicated and can enhance or retard the diffusiophoretic motion. The particle velocity at can be about 17% smaller or 0.2% greater than that at . Under practical conditions, the solute convection effect on the diffusiophoretic velocity is much greater for a cylindrical particle than for a spherical particle, whose leading correction has the order .