Penelitian ini bertujuan untuk mengetahui tingkat pemahaman makroskopik, mikroskopik dan simbolik mahasiswa dengan tujuan memberikan pemahaman konseptual yang utuh dan menyeluruh kepada mahasiswa, sehingga mahasiswa tidak membuat interpretasi sendiri dalam memberikan gambaran mikroskopik. Penelitian dilaksanakan di kota Langsa bertempat di Laboratorium Lanjut Prodi Pendidikan Kimia FKIP Universitas Samudra. Teknik pengambilan sampel menggunakan purposive sampling yaitu mahasiswa semester II dengan pertimbangan kelas hanya terdiri dari satu unit dan materi titrasi asam basa hanya ada pada semester II. Metode penelitian yang digunakan adalah eksperimen semu dengan pendekatan kuantitatif. Teknik pengumpulan data menggunakan soal tes berbentuk pilihan berganda. Hasil penelitian didapati bahwa profil  kemampuan representasi mahasiswa pada praktikum titrasi asam basa untuk tingkat makroskopik, submikroskopik, dan simbolik  berturut-turut sebesar 92% dengan kategori sangat baik, 82% dengan kategori cukup, dan 86% dengan kategori sangat baik. Dari ketiga indikator representasi kimia, indikator submikroskopis memiliki persentase lebih rendah dibandingkan dengan indikator lainnya, hal ini disebabkan mahasiswa sulit menerangkan fenomena reaksi kimia dari suatu larutan dengan gambar molekul atau ion.

Implementation of learning modules is part of the development proses of ethnochemistry based modules. This study aims to find out the effect of the implementation of ethnochemical-based food chemistry modules on students through analysis of student understanding of integrated chemistry concepts, analysis of the effectiveness of learning processes in the classroom, and the level of understanding and awareness of ethnochemistry and the scientific process. This type of research is quantitative descriptive with a comparative approach using an experimental method with a control group. The sample determination was done by random sampling technique taken at one of the Vocational Schools in East Aceh on Food Expertise Program. Data collection is done through evaluating student learning outcomes using multiple choice questions, measuring learning effectiveness and understanding of ethnochemistry using observation sheets and structured interview sheets. The research results obtained student learning outcomes in the experimental class were on average higher than the control class, even though the results of statistical using t test did not show a significant difference. The score of the observation result of learning effectiveness in the experimental class is higher than the control class that is equal to 89,532 with very good criteria. Measurement of students' understanding of ethnochemistry after the application of the module obtained an increase of 40 points compared to before the application of the module. This shows an increase in students' understanding and awareness of ethnochemistry and the scientific process that take place in it and can strengthen the justification that learning modules with ethnochemical approaches are very well applied as teaching material.

The Covid-19 pandemic has plagued almost all parts of the world. The virus is transmitted by droplets, droplets, or in medical terms known as droplets when someone coughs, sneezes, or talks. There are two ways of transmitting the corona virus through droplets, namely directly and indirectly. The use of masks in preventing direct transmission of the virus is an important thing to do. Making waterproof masks made from polyester fabrics that are waterproof, splash or droplet seepage is an alternative for people to get proper masks without having to spend a lot of money. The use of a waterproof mask made from polyester cloth is not only more economical, but also more environmentally friendly because it can be reused. The simple manufacturing process and easy and inexpensive materials allow this business to be accepted by the community. This waterproof mask making training can improve the readiness of the people of Langsa City, especially Lhokbanie Village, to face the Covid-19 pandemic. The mask products produced from this training can also be used repeatedly so that they can protect the environment.

This study aims to analyze the increase in students' scientific literacy by implementation of case method learning. This is a quasi-experimental research using a one group pretest-posttest design. The research sample is the first semester students of the Chemistry Education Department at Universitas Samudra in the odd semester of the 2022/2023 academic year. This research consists of four stages, namely material analysis, development of tools and instruments, implementation, and data analysis. The scientific literacy test instrument was used to measure students' scientific literacy. Students' scientific literacy skills are presented according to content, science process, and context aspects. The increase in students' scientific literacy skills was analyzed based on the N-gain and paired sample t test. The results of the study found that students' scientific literacy skills in all content, science process, and contexts, were higher in the posttest than the pretest except for content energy that accompanies changes in material and context of natural resources. The average scientific literacy ability of students at the posttest (74.33) was higher than at the pretest (57.08). The N-gain value of 0.40 indicates an increase in students' scientific literacy skills with implementation of case method learning in the medium category. Analysis with paired sample t test indicates a significant difference in the pretest and posttest scores. Thus, it can be concluded that case method learning can improve students' scientific literacy skills in the three domains of scientific literacy.

Penelitian ini bertujuan untuk menentukan hubungan pemahaman konsep dasar kimia dengan kemampuan literasi sains. Penelitian merupakan penelitian kuantitatif dengan metode survei. Teknik pengambilan sampel secara purposive sampling. Sampel merupakan 149 mahasiswa pendidikan kimia dari beberapa kelas dan angkatan. Instrumen pengumpul data terdiri atas tes pemahaman konsep dasar kimia dan tes literasi sains. Analisis data dengan uji korelasi Spearman Rank pada program SPSS. Hasil penelitian menunjukkan koefisien korelasi sebesar 0,534 atau lebih besar dibandingkan dengan rs tabel pada taraf signifikansi 5% yaitu 0,197. Sementara itu, signifikansi atau nilai probabilitasnya sebesar 0,000 atau lebih kecil dari 0,05 sehingga dapat disimpulkan bahwa terdapat hubungan yang signifikan antara pemahaman konsep dasar kimia dengan kemampuan literasi sains. Jadi semakin tinggi pemahaman konsep dasar kimia mahasiswa maka juga semakin tinggi kemampuan literasi sainsnya.