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Analisis Miskonsepsi pada Materi Larutan Penyangga Menggunakan Two-Tier Diagnostic Test Stephanie, Mian Maria; Fitriyani, Dewi; Paristiowati, Maria; Moersilah, Moersilah; Yusmaniar, Yusmaniar; Rahmawati, Yuli
Jurnal Riset Pendidikan Kimia (JRPK) Vol. 9 No. 2 (2019): Jurnal Riset Pendidikan Kimia (JRPK), Volume 9 Nomor 2 (2019)
Publisher : LPPM Universitas Negeri Jakarta

This study aims to find out the misconceptions that occur in buffer solution materials using two-tier diagnostic tests instrument. The instrument was developed based on the buffer solution material competency indicators into 10 questions and was declared valid for use. The research was conducted on level I and III college students and students totaling 159. The results showed that there was a misconception on the concept of buffer solution properties of 24.6%, the concept of buffer solution composition was 24.1%, the working principle of buffer solution was 29.3 %, and the concept of pH solution is 25.4%. he cause of the misconception is because the initial concept of the respondent is weak, the teacher's explanation often simplifies the concept, the habit of the respondent to memorize, understanding the language and weak mathematical concepts, and learning models that have not provided the opportunity for respondents to understand the components and principles of working buffer solutions microscopically. Knowledge of misconceptions is needed as an evaluation of teachers and lecturers to be more motivated to implement learning models that are able to overcome misconceptions to prevent wider misconceptions in learning chemistry that make chemistry difficult. Keywords Misconception, Two-Tier Diagnostic Test, Buffer Solution

Analysis of Students' Science Process Skills in Project-Based Chemistry Learning Integrated with Education for Sustainable Development Paristiowati, Maria; Moersilah, Moersilah; Stephanie, Mian Maria
LAVOISIER: Chemistry Education Journal Vol 2, No 2 (2023): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v2i2.8758

This study aims to analyze the profile of science process skills through the implementations of project-based learning integrated education for sustainable development on acid-base material. The aim of the project is to create a natural acid-base indicator that can determine the pH range of various solutions and the concentration of a solution using the titration method. This study uses a qualitative research method, the interpretive paradigm with the research subjects of XI IPA students in Jakarta totaling 29 people. Data collection techniques are carried out by class observation, reflective journals of student, interviews, and tests of science process skills. The results showed that science process skills arises during learning and were classified as very good with an average value of 86.99% according to observations and classified as good with an average value of 72.26% in the test of science process skills. Students apply the education for sustainable development (ESD) concept during the project by choosing safe solvents and conducting small-scale experiments to reduce the waste produced. The application of this project is expected to make students have the skills of a researcher by paying attention to sustainable development in every decision they make during learning.

The Impact of Using a Problem-Based Learning Approach on Students' Science Literacy in Class XI Natural Sciences and Mathematics on Reaction Rate Factor Material Stephanie, Mian Maria
LAVOISIER: Chemistry Education Journal Vol 2, No 2 (2023): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v2i2.8763

This study aims to determine the effect of applying the problem-based learning model on the literacy abilities of class XI MIA 3 students in the chemical reaction rate topic. This study used a classroom action research method for class XI students of SMAK 7 BPK PENABUR Jakarta, starting from August to October 2020. This classroom action research applied the Stephen Kemmis and Mc Taggart model. Through the results of the final test, observation, and journal reflection for two cycles, this study found that there was an increase in students' literacy skills. This study concludes that this learning model can be used to improve students' literacy skills if the teacher plans learning appropriately. Based on experience in conducting classroom action research, the researcher provides a number of suggestions to the teacher in applying this method.

Analysis of Students' Science Process Skills in Project-Based Chemistry Learning Integrated with Education for Sustainable Development Paristiowati, Maria; Moersilah, Moersilah; Stephanie, Mian Maria
LAVOISIER: Chemistry Education Journal Vol 2, No 2 (2023): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v2i2.8758

This study aims to analyze the profile of science process skills through the implementations of project-based learning integrated education for sustainable development on acid-base material. The aim of the project is to create a natural acid-base indicator that can determine the pH range of various solutions and the concentration of a solution using the titration method. This study uses a qualitative research method, the interpretive paradigm with the research subjects of XI IPA students in Jakarta totaling 29 people. Data collection techniques are carried out by class observation, reflective journals of student, interviews, and tests of science process skills. The results showed that science process skills arises during learning and were classified as very good with an average value of 86.99% according to observations and classified as good with an average value of 72.26% in the test of science process skills. Students apply the education for sustainable development (ESD) concept during the project by choosing safe solvents and conducting small-scale experiments to reduce the waste produced. The application of this project is expected to make students have the skills of a researcher by paying attention to sustainable development in every decision they make during learning.

The Impact of Using a Problem-Based Learning Approach on Students' Science Literacy in Class XI Natural Sciences and Mathematics on Reaction Rate Factor Material Stephanie, Mian Maria
LAVOISIER: Chemistry Education Journal Vol 2, No 2 (2023): LAVOISIER: Chemistry Education Journal
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v2i2.8763

This study aims to determine the effect of applying the problem-based learning model on the literacy abilities of class XI MIA 3 students in the chemical reaction rate topic. This study used a classroom action research method for class XI students of SMAK 7 BPK PENABUR Jakarta, starting from August to October 2020. This classroom action research applied the Stephen Kemmis and Mc Taggart model. Through the results of the final test, observation, and journal reflection for two cycles, this study found that there was an increase in students' literacy skills. This study concludes that this learning model can be used to improve students' literacy skills if the teacher plans learning appropriately. Based on experience in conducting classroom action research, the researcher provides a number of suggestions to the teacher in applying this method.

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