Development of Practicum Instructions for Junior High School Students: Formalin Test Using Natural Indicators

Rahman, Nanang; Purwoko, Agus; Muntari,; Haifaturrahmah,

doi:10.1088/1742-6596/1227/1/012041

Cited by 3 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Clitoria ternatea , also known as the butterfly pea flower (BPF), offers an opportunity to address this need since it contains ternatins (a type of anthocyanin). These ternatins exhibit clearly distinguishable color changes at a broad range of pH compared to phenolphthalein, bromophenol blue and natural pigments like turmeric, Hibiscus rosa-sinensis , and Morning Glory. − Typically, anthocyanidins resemble the flavylium cation, which is an aromatic structure composed of three rings containing an oxonium ion. However, this polyphenolic structure is susceptible to oxidation, which can cause the colors to fade.…”

Section: Introductionmentioning

confidence: 99%

Teaching Acid–Base Fundamentals and Introducing pH Using Butterfly Pea Flower Tea

Naimi,

Vinnacombe-Willson,

Saldana

et al. 2024

J. Chem. Educ.

View full text Add to dashboard Cite

Stimulating interest in science at an early age is important for STEM education. This work details an educational activity utilizing the anthocyanins found in butterfly pea flowers (Clitoria ternatea). This activity was developed for use in official classroom settings, online, and/or at-home with parental or educator guidance. Primary and high school students aged 7 to 14 performed a straightforward extraction of anthocyanin pH indicators from Clitoria ternatea with hot water. Students were able to use this indicator and its vast range of colors to compare the acidities and basicities of different household solutions. Most of the recorded responses show that students used reasoning from the indicator and a subsequent chemical reaction to correctly differentiate acids from bases and compare their strengths. Overall, this activity’s application of nontoxic and easily accessible indicators from the butterfly pea flower assisted in introducing young students to various concepts in acid–base chemistry, including acid/base strength and pH, solute dissolution, neutralization reactions, and qualitative analysis.

show abstract

Section: Introductionmentioning

confidence: 99%

Teaching Acid–Base Fundamentals and Introducing pH Using Butterfly Pea Flower Tea

Naimi,

Vinnacombe-Willson,

Saldana

et al. 2024

J. Chem. Educ.

View full text Add to dashboard Cite

show abstract

“…The utilization of web-based media is one of the latest developments in digital education. Web utilization as learning media is a method to present learning materials by utilizing the internet, including in the form of writing, simulations, and other interactive content [4]. It creates a new learning experience for students, enriching the learning process in a more diverse, dynamic, and creative way, potentially improving their academic achievement [5].…”

Section: Introductionmentioning

confidence: 99%

Development of Web-Based Learning Media on Class X Virus Material

Ningsih,

Sari

2024

Biotik

View full text Add to dashboard Cite

Based on the results of the pre-survey that has been carried out at SMA Negeri 1 Kotagajah, a problem was found, namely the use of learning media that is lacking during teaching and learning activities on biological material including virus material. In teaching and learning activities, the educational media used are limited to Student Worksheets (LKPD) and Power Point. This resulted in some students having difficulty understanding the information and losing interest in biology. Scientists then developed a learning platform based on viral content available to Class X students via the Internet. The five stages of the ADDIE model are analysis, design, development, implementation, and evaluation. Percentage results of 80%, 87%, 94% and 85% were obtained from material expert, media expert, teacher and student validators. Students indicated that the use of web-based learning materials about viruses was "very feasible".

show abstract