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The process of producing the extract of the connective plant by decoction using solvent a) methanol, b) ethanol, and c) water for ± 10 minutes.
Source publication
This study aims to develop a paper indicator from Aerva sanguinolenta plant extract. The experimental method is used including the analysis of the dye, the extraction of various solvents, the test of the phenolic compound, and the absorbance measurement of the UV-Vis spectrophotometry of the plant extract, and the creation of indicator paper by abs...
Citations
... Small bungur extract can also use as an acid-base indicator paper with a yellow discoloration in acid and dark green in base (Pulukadang, 2022). Solok sambang extract can give purple to yellow color in the pH range of 11-12 (Sopiah et al., 2018). In addition, rosella petal extract can use as an indicator of an acid base (Yazid & Munir, 2018). ...
The acid-base titration experiments at Senior High Schools typically use phenolphthalein and methyl orange indicators, which are relatively expensive and harmful to the environment. One of the plants containing anthocyanin pigments is boat lily (Rhoeo spathaceae (Sw.) Stearn) leaves. The research aims to determine the potential analysis of boat lily leaf extract as an alternative indicator used in chemistry learning in titration acid-base learning. The type of research used in this study is descriptive qualitative. Based on the research and discussion results, the pedagogical aspects carried out by chemistry teachers obtained results that using boat lily leaf extract indicators in acid-base titration in the acid-base chapter is appropriate and meets pedagogical terms to be applied by chemistry teachers. A review of chemistry teachers, laboratory employees, and students obtained results that the use of boat lily leaf extract indicators in acid-base titration in the acid-base chapter can be approved because it meets the aspects of ease to be applied in learning, understanding, and attractive to students, and ease of being provided in the laboratory. Based on the feasibility analysis of potential experiments, boat lily leaf extract is feasible based on financial aspects and shelf life resilience.
... Misalnya indikator alami atau pewarna alami yang berasal dari tanaman atau tumbuh-tumbuhan seperti kunyit, kulit manggis, buah naga, dsb. Penggunaan bahan-bahan tersebut dilakukan karena jenis tanamannya mengandung senyawa pemberi warna (Sopiah et al., 2018). Dengan dilakukannya pembelajaran kaligrafi berbasis eksperimen ini, dapat membantu untuk mengetahui rahasia alam raya dan isinya serta mensyukuri ciptaan Allah swt. ...
Learning the art of calligraphy based on chemical experiments is an activity of learning the art of calligraphy in developing the potential of students to foster creativity, instill value, and develop productive abilities by using harmless materials, namely using colored plants. The purpose of this research was to determine the process and to obtain calligraphy work in learning the art of calligraphy based on chemical experiments. The type of method used in this research is field qualitative research. The data sources in this study were divided into two: first, primary data sources consisting of the principal, educators, and students of SDN 8 Kawunglarang Rancah; second, secondary data sources obtained through tracing of various references. Furthermore, the data collection instruments used were observation, interviews, and documentation, as well as the data analysis techniques used, namely through three stages including data reduction, data presentation, and drawing conclusions. The results of this study indicate that the process of learning the art of calligraphy based on chemical experiments includes the planning, implementation, and evaluation stages. The work of SDN 8 Kawunglarang students is still in the basic stages so there are several mistakes in its making.
