Nonelectrolyte Solutions Research Articles

IMPROVES CRITICAL THINKING SKILLS AND SELF-EFFICACY OF LEARNERS USING THE PJBL-STEAM MODEL IN WETLAND CONTEXTS

Critical thinking skills are one of the essential thinking skills mastered in the 21st century for the progress of a nation. They can help a person to solve problems by interpreting, analyzing, evaluating, and inferring. Self-efficacy is a person's belief in his ability to solve problems. The ability to think critically is related to self-efficacy. The PjBL-STEAM model is one of the alternatives that seek to improve student’s critical thinking and self-efficacy skills. The wetland context referred to in this study uses a solution of fruits that can live in wetlands as one of the learning media on electrolyte and nonelectrolyte solution materials. This study aims to examine the improvement of critical thinking and self-efficacy of students through the use of the PjBL-STEAM learning model in wetland contexts by comparing pretest and posttest values. This research model is quasi-experimental with a one-group pretest-postest research design. This study was conducted at SMAN 3 Barabai with a study population of class X MIA, and the sample taken purposively was 25 students of class X MIA 3. Data collection using tests and questionnaires. Data analysis was carried out by comparing pretest and posttest values. The results showed that the PjBL-STEAM learning model in the wetland context could improve the critical thinking skills and self-efficacy of students with an N-gain value of critical thinking ability of 0.58 (moderate category) and N-gain self-efficacy of 0.75 (high category). In other words, using PjBL-STEAM in wetland contexts is stated to be effective for improving students' critical thinking skills and self-efficacy.

A Powtoon Animation Video Development Utilizing a Scientific Approach for Teaching Electrolyte and Non-electrolyte Solutions

Students often experience difficulty learning chemistry because the concepts are abstract and complex and require deep understanding. Therefore, innovation in learning is needed. Educational media is crucial for fostering this innovation. This research aims to develop educational materials on Powtoon animation that utilize a scientific approach to instruct on electrolyte and non-electrolyte solutions and evaluate their efficacy. The method applied was ADDIE model covering five steps, i.e. Analysis, Design, Development, Implementation, and Evaluation. The study involved three peer reviewers, experts in media and materials, five high school chemistry teachers, and thirteen students. Data were collected through questionnaires that were analyzed qualitatively and quantitatively with validated instruments. The result is an interactive learning video in HD mp4 format covering electrolyte and non-electrolyte solutions. The product obtained a score of 82.5% and 95% by material and media experts, respectively, and was categorized as valid. Assessments by teachers and students show scores of 82,5% and 94.4% in a very good category. This Powtoon animation video serves as an alternative and potential medium for teaching chemistry on this topic in the classroom.

The Effect of Learning Cycle 5E with Animation Media at Student Activities and Learning Outcomes

This study aims to determine the effect of application of Cycle 5E learning model with animation media at learner activities and learning results. The sample was taken by random sampling of 32 learners at experiment and control room. The research was carried out by providing pre-check, after which learning material by nonelectrolyte and electrolyte solutions were applied with the Cycle 5E learning model with animation media at experiment room and the Conventional model at control class, then the posttest. From statistic processing, the following results were obtained: the average activity of learners at the experiment room was 89.76 and the control room was 80.55 with > or 4.59>1.67. The average learning outcome of learners at the experiment room was 81.71 and the control room was 72.96 with > or 5.57>1.67. Correlation between learner activities and learning results of experiment room learners at the calculation rcount Retrieved rcount=0.583 While rtableat α=0.05 (N = 32) is 0.349. With an index determination of 0.33 with a percentage of 33%. This means that there is a correlation between learner activities and learner learning results learned by the Cycle 5E learning model with animation media at material by nonelectrolyte and electrolyte solutions.

The Development of Interactive Multimedia using Adobe Animate to Increase Student’s Learning Interest in Electrolyte and Non-Electrolyte Solution Material

Education is a process of developing a person's strengths and abilities, in a conscious and planned way to create a learning process and atmosphere that allows students to actively develop their potential. Education provides everyone with the knowledge, abilities, and values they need to face difficulties and challenges in life. In the modern technological era, education and technology are two elements that are increasingly integrated and have an extraordinary impact on human life. The purpose of this study is to find out how effective the use of interactive multimedia using Adobe Animate is to increase students' interest in learning electrolyte and non-electrolyte solution materials. The method used in this study is Literature Review to compare data from several journals relevant to the research topic. This research relies on literacy data search websites, such as Jurnal Sinta, Google Scholar, and Mendeley. The results of the study show that using interactive multimedia using Adobe Animate as a fun learning medium can increase students' interest in learning.

Profil Pemahaman Representasi Mikroskopik Mahasiswa IPA pada Materi Larutan Elektrolit dan Non-elektrolit

Chemistry as one of the natural sciences has the characteristic of abstract concepts where the concepts in chemistry cannot be perceived by the senses so that special visualization is needed. Therefore, to understanding the abstract concept in chemistry, multiple representations are known, namely macroscopic, microscopic, and symbolic representations. This microscopic representation is used to visualize abstract concepts at the molecular level. However, in chemistry learning, especially at the high school level, it is still very rare to find chemistry learning that involves understanding chemical concepts at the microscopic level. So the aim of this study is to determine the profile of microscopic representation understanding of IPA college students as prospective teachers on the material of electrolyte and non-electrolyte solutions. The descriptive quantitative method with a test approach was used as a method in this study and the sample is 72 Tadris IPA college students of IAIN Ponorogo in the 2023/2024 academic year. The results of the study show that in the category of analysis of differences between strong electrolyte and weak electrolyte solutions, students' understanding of microscopic representation is low, while in the category of analysis the solubility of a substance in water, students' understanding of microscopic representation was classified as moderate.

Evaluation of Learning Media Creation Based on Results of Computational Chemistry Calculations Visualised

The objective of this study is to determine the outcomes of the requirements analysis and learning materials for electrolyte and non-electrolyte solution materials. Additionally, learning materials will be developed utilising computational chemical calculations and visualisation of the results to create learning media based on the National Education Standards Agency (BSNP) requirements. This kind of study uses the ADDIE development model and is referred to as development research. There are five steps in the current ADDIE model: analysis, design, development, implementation, and evaluation. The entire student body of one of the senior high schools in Padangsidempuan City, North Sumatera, Indonesia, served as the study's population. The participants in this research were senior high school students from Padangsidempuan City, North Sumatera, Indonesia. The use of a purposive sampling technique yields grade X as the research sample. An inquiry form derived from the National Education Standards Agency was used as the research tool. Utilising a significance level of 5%, the data analysis was conducted using the SPSS 22 for Windows software. The investigation's findings demonstrate the need for educational materials to help pupils struggling with learning. Based on 95% validation findings, the learning materials for both electrolyte and non-electrolyte solutions visualise the outcomes of computational chemical calculations.

Diffusiophoresis in Polymer and Nanoparticle Gradients.

Diffusiophoresis is the movement of the colloidal particles in response to a concentration gradient and can be observed for both electrolyte (e.g., salt) and nonelectrolyte (e.g., glucose) solutes. Here, we investigated the diffusiophoretic behavior of polystyrene (PS-carboxylate surface) microparticles in nonadsorbing charged and uncharged solute gradients [sodium polystyrenesulfonate (NaPSS), polyethylene glycol (PEG), and nanoscale colloidal silica (SiO2)] using a dead-end channel setup. We compared the diffusiophoretic motion in these gradient types with each other and to the case of using a monovalent salt gradient. In each of the nonadsorbing gradient systems (NaPSS, PEG, and SiO2 nanoparticles), the PS particles migrated toward the lower solute concentration. The exclusion distance values (from the initial position) of particles were recorded within the dead-end channel, and it was found that an increase in solute concentration increases exclusion from the main channel. In the polyelectrolyte case, the motion of PS microparticles was reduced by the addition of a background salt due to reduced electrostatic interaction, whereas it remained constant when using the neutral polymer. Particle diffusiophoresis in gradients of polyelectrolytes (charged macromolecules) is quite similar to the behavior when using a PEG gradient (uncharged macromolecule) in the presence of a background electrolyte. Moreover, we observed PS microparticles under different concentrations and molecular weights of PEG gradients. By combining the simulations, we estimated the exclusion length, which was previously proposed to be the order of the polymer radius. Furthermore, the movement of PS microparticles was analyzed in the gradient of silica nanoparticles. The exclusion distance was higher in silica nanoparticle gradients compared to similar-size PEG gradients because silica nanoparticles are charged. The diffusiophoretic transport of the PS microparticles could be simulated by considering the interaction between the PS microparticles and silica nanoparticles.

Development of E-Worksheet Oriented Guided Inquiry using Liveworksheet on Electrolyte and Non-Electrolyte Solution Materials

Development of E-Worksheet Oriented Guided Inquiry using Liveworksheet on Electrolyte and Non-Electrolyte Solution Materials

Description of Students' Science Literacy Ability on Electrolyte and Non-Electrolyte Solution Materials at SMAN 11 Pontianak

It is important for students to learn scientific literacy because it’s related to how students understand the environment and face issues in modern society. Students with excellent scientific literacy skills are able to apply the concepts and facts learned at school in everyday situations. The purpose of this research is to provide an overview of students’ scientific literacy at SMA Negeri 11 Pontianak. The research method used is descriptive research with a quantitative approach. The population under study consists of grade XI science students, including XI IPA 1, XI IPA 2, and XI IPA 3. Sample selection employs purposive sampling technique, considering specific factors such as students who have received instruction from teachers in the subject of electrolyte solutions and possess a good academic abilities. A total of 37 students from class XI IPA 2 are chosen as research samples. Data collection technique involves measurement and communications, utilizing instruments in the form of five essay questions that have been tested for validity. Based on the research data, it is known that aspect of explaining scientific phenomena reached 60,47%, while in determine the properties and samples of solutions from electrical conductivity experimental data, percentage is 75%. To provide conclusions and opnions on electrolyte test results from everyday life phenomena reached 61,93%. If averaged, overall, students’ scientific literacy skills are in the moderate category, with an average score of 65,251%.

Using Predict-Observe-Explain (POE) Online Learning Systems During the COVID-19 Pandemic

Online learning during the COVID-19 pandemic caused students’ learning activities to be less visible. This study aimed to analyze students’ learning activities through the application of the Predict-Observe-Explain (POE) learning system during classes about electrolyte and nonelectrolyte solution materials. Implementation of online learning was conducted through Zoom Meetings and WhatsApp Groups, as well as using videos. This study used a descriptive method with research subjects, 31 students of grade X, IPA MA Al-Badriyah Sukabumi. Data was collected through observation sheets and student worksheets (LKS). Based on the analysis of the data, the average percentage of student activity during online learning was 97.9%, with a very good criterion. Thus, the application of POE learning online can show students learning activities very well. Keywords: application, online learning, electrolyte, nonelectrolyte

The Effect of E-Module on Activity and Learning Outcomes on Electrolyte and Nonelectrolyte Solutions

This research aims to determine activities, learning outcomes and the correlation between activities and student learning outcomes taught using the Project Based Learning (PjBL) learning model assisted by e-modules for class X SMA on electrolyte and non-electrolyte solutions. The population in this study were students of class This research uses test and non-test instruments in the form of student learning activity observation sheets which have been tested and are valid. The data obtained were tested for normality and homogeneity. Based on the results of data processing that has been analyzed, there are learning outcome values tcount = 9.714 and ttable = 1.66, the activity obtained is tcount = 6.069 and ttable = 1.66. Where tcount>ttable shows that Ha is accepted and H0 is rejected, so it can be concluded that there is an influence of the Project Based Learning (PjBL) learning model assisted by e-modules for class X SMA on electrolyte and non-electrolyte solutions. The correlation test was carried out to determine the significant correlation between activities and student learning outcomes. The research results show that rcount > rtable (0.929 > 0.329) so H0 is rejected. Thus, there is a significant correlation between activities and student learning outcomes assisted by e-modules for class X SMA on electrolyte and non-electrolyte solutions.

Validity of Student Worksheets Based on Multiple Representations of Electrolyte and Non-Electrolyte Solution Materials

Multiple representations can facilitate the understanding of abstract chemical concepts. Multiple representations can be incorporated into teaching materials, such as Student Worksheets, to create Multiple Representation-based Student Worksheets. This study aims to analyze the validity of Student Worksheets based on multiple representations of electrolyte and non-electrolyte solutions. The research utilized the Research and Development (R&D) model with the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) development stages, reaching the development stage in this study. Data were obtained from material expert and media expert validators. Descriptive statistical analysis was used to analyze the validity results. The Student Worksheets based on multiple representations of electrolyte and non-electrolyte solution materials achieved an average validity percentage of 84.37% from material experts and 95% from media experts, categorizing them as very valid. These worksheets, focusing on the validity aspect, are effective in assisting students in understanding chemical concepts.

Hyponatremia in the Context of Liver Disease.

Hyponatremia is common in patients with liver disease and is associated with increased mortality, morbidity, and a reduced quality of life. In liver transplantation, the inclusion of hyponatremia in organ allocation scores has reduced waitlist mortality. Portal hypertension and the resulting lowering of the effective arterial blood volume are important pathogenetic factors, but in most patients with liver disease, hyponatremia is multifactorial. Treatment requires a multifaceted approach that tries to reduce electrolyte-free water intake, restore urinary dilution, and increase nonelectrolyte solute excretion. Albumin therapy for hyponatremia is a peculiarity of advanced liver disease. Its use appears to be increasing, while the vaptans are currently only given in selected cases. Osmotic demyelination is a special concern in patients with liver disease. Serial checks of serum sodium concentrations and urine volume monitoring are mandatory.

Development of Electrolyte Box to Improve Student Learning Outcomes at SMAN 2 Sungai Ambawang

The problems that arise in class X MIA SMA Negeri 2 Sungai Ambawang related to the learning process have not carried out practicum activities due to limited facilities and infrastructure at school. This study aims to develop Electrolyte Box media on electrolyte and nonelectrolyte solution materials that are valid, practical and effective. This type of research is Research and Development (R&D) ADDIE model. The sampling technique used is purposive sampling technique. The sample in this study amounted to 27 students of SMA Negeri 2 Sungai Ambawang. Validity is measured from the validator's assessment using the validation sheet, practicality is measured from the learner response questionnaire, then effectiveness is measured based on the pretest and posttest results of students. The data analysis technique is descriptive statistics. The results of the validity of the material and media aspects of the Electorlyte Box are 0.83 (very valid) and 0.79 (valid), respectively. The practicality test results in the initial and main field trials obtained very practical criteria with a value of 98.43% and 96.30% respectively. The effectiveness aspect in the initial and main field trials was 0.73 and 0.71 with high criteria. Therefore, the learning media in high school that has been developed is suitable for use as learning media.

Towards a biomimetic cellular structure and physical morphology with liposome-encapsulated agarose sol systems

The cytoplasm, serving as the primary hub of cellular metabolism, stands as a pivotal cornerstone for the harmonious progression of life. The ideal artificial cell should not only have a biomembrane structure system similar to that of a cell and the function of carrying genetic information, but also should have an intracellular environment. In this pursuit, we employed a method involving the incorporation of glycerol into agarose, resulting in the formation of agarose-glycerol mixed sol (AGs). This dynamic sol exhibited fluidic properties at ambient temperature, closely mimicking the viscosity of authentic cytoplasm. Harnessing the electroformation technique, AGs was encapsulated within liposomes, enabling the efficient creation of artificial cells that closely resembled native cellular dimensions through meticulous parameter adjustments of the alternating current (AC) field. Subsequently, artificial cells harboring AGs were subjected to diverse electrolyte and non-electrolyte solutions, enabling a comprehensive exploration of their deformation phenomena, encompassing both inward and outward budding. This study represents a significant stride forward in addressing one of the most fundamental challenges in the construction of artificial cytoplasm. It is our fervent aspiration that this work shall offer invaluable insights and guidance for future endeavors in the realm of artificial cell construction.

DESAIN DAN UJI COBA E-LKPD BERBASIS INTRODUCTION CONNECT APPLY REFLECT EXTEND (ICARE) PADA MATERI LARUTAN ELEKTROLIT DAN NON ELEKTROLIT

This research was instigated by the lack of available teaching material that was appropriate with student need—a teaching material connected the concept implementation to daily life. This research aimed at designing valid ICARE based electronic student workbook on Electrolyte and non-Electrolyte Solution lesson based on the validation by media and material experts, the teacher and student practicality tests. It was Research and Development (R&D) with Borg and Gall development design, and the steps were (1) researching and collecting information, (2) planning, (3) developing the initial form of the product, and 4) preliminary field testing, and (5) revising the product. Preliminary field testing was conducted to the eleventh-grade students of MIPA at State Senior High School located in Kampar district. The validation result by media and material experts showed that the score was 94.13% with very valid criterion. Teacher practicality test showed that the result was 93.63% with very practical category, and student practicality test showed that the result was 84.54% with very practical category.

Potential of Medicinal Plants in Pampang Village Samarinda As A Chemistry Learning Resource

This research aims to identify the potential of medicinal plants in Pampang Village, Samarinda, East Kalimantan, which can be used as a source of chemistry learning at the junior and senior high school levels. This research used a descriptive method with a qualitative approach. Data collection was carried out through observation, interviews, and documentation. The research subjects, namely 11 residents of Pampang Village, were determined using purposive sampling. Data analysis used interactive model analysis, and data validity is measured using data triangulation techniques. The results of the research show that there are 20 medicinal plants that the people of Pampang Village widely used and eight medicinal plants have the potential to be used as a source of chemistry learning. These medicinal plants were sambung nyawa, meniran, bajakah, betel, seri, turmeric, coconut, and tamarind eggplant. These plants related to materials separating mixtures, reaction rates, functional groups, lipids, acid and base indicators, electrolyte and non-electrolyte solutions, acids and bases, chemical changes, and redox. Therefore, this can be used as a reference and consideration for chemistry teachers in the learning process. to help students understand chemistry lessons closely related to everyday life.

THE DEVELOPMENT OF STEM-BASED E-STUDENT WORKSHEETS ON ELECTROLYTE AND NON-ELECTROLYTE SOLUTION MATERIAL TO IMPROVE STUDENT’S LEARNING OUTCOMES

The aim of this research is to develop STEM-based E-Student Worksheets, determine the feasibility of STEM-based E-Student Worksheets as assessed by material expert validators, learning experts, and design experts, and describe the effectiveness of STEM-based E-Student Worksheets in improving student learning outcomes in material electrolyte and non-electrolyte solutions. This RD using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). Product trials were conducted on a small group of 30 students from a single class. Material experts, three learning experts, three design experts, and pretest and posttest results were used to collect data, which was then analyzed and described. According to the experts' feasibility assessment, three validators material experts, three learning expert validators, and three design expert validators were declared very feasible to use in the learning process with successive average scores: 81.5%, 87.78%, and 85.97% with very feasible criteria and E-Student Worksheets based STEM which is designed to be effective for improving student learning outcomes and can be used in learning, With learning outcomes, an average pretest score of 51.67 and a posttest score of 86.33 were obtained, as well as an average N-Gain of 0.72 with high interpretation and a percentage of completeness of 90%.

Analisis Pemahaman Siswa SMA Pada Materi Larutan Elektrolit Dan Non Elektrolit

It’s very important for students to be able to understand the basic concepts of chemistry and how they relate to one concept to another. The purpose of this study is to evaluate and examine the nderstanding of grade XI MA Al Rohmah students in Tasikmalaya for understanding the concept of electrolyte and non electrolyte solutions. Descriptive research methodology with a quantitative approach is used. The study involved 22 students who were taken as samples by researchers. Data collection was conducted through an online questionnaire-based test consisting of 7 multiple-choice questions with Yes/No options. The results showed that 18 students (81.81%) had the ability to understand the concept of electrolyte and non-electrolyte solutions very well. But there are still 4 students (18.19%) who still do not understand the basic concepts of electrolyte and non-electrolyte solution materials. This shows that a more interactive and in-depth learning approach is needed to increase students' understanding of electrolyte and non electrolyte solution materials which include phases and chemical bonds in a compound that can affect its electrolyte properties, lamp flame tests on electrolyte and non electrolyte compounds, and the ionization process of electrolyte and non-electrolyte solutions to strengthen the basic concepts of student chemistry.

Physicochemical properties and anthocyanin content of commercially manufactured elderberry jams from Patagonia (Argentina)

Abstract Commercially manufactured elderberry jams elaborated in Patagonia, Argentina, were analyzed for physico-chemical characteristics. Water activity (a w) ranged between 0.758 and 0.972 and total monomeric anthocyanin (TMA) content varied from 2.4 up to 55 mg Cy-3G/100 g jam. Relationship between a w and °Brix in jams was described using an equation for correlating water activity in non-electrolyte solutions. Elderberry jam samples were stored at 38 °C and samples periodically withdrawn for analysis. TMA degraded following first order reaction kinetics and color parameter a* decreased during storage while parameter h° increased. Water activity and presence of fructose in jams increased rate of TMA destruction and adversely affected color changes. Studies with sugar solutions containing anthocyanins confirmed TMA degradation is faster in models having reducing sugars than in the presence of sucrose. It is shown that sucrose may undergo hydrolysis during acid catalyzed storage at 38 °C and pH 3.5.