A Study into Using Plant Extracts as Indicators for the Endpoint in the Acid-Base Titrations


  • Aisha Alabbsi Chemistry Department, Faculty of Science, Sebha University, Libya
  • Dania Abu Alassad Chemistry Department, Faculty of Science, Sebha University, Libya
  • Ihssin Abdalsamed Chemistry Department, Faculty of Science, Sebha University, Libya
  • Khadija Ahmida Chemistry Department, Faculty of Science, Sebha University




Acid-Base Titrations. Green Chemistry, Natural Indicators, Methyl Orange ; Phenolphthalein


Acid-base titrations are the key part of volumetric analysis in the first year undergraduate chemistry practical program in Libya. Students are typically taught the procedures and skills necessary for acid-base titrations utilizing chemically synthesized indicators. Frequently utilized Synthetic indicators are sometimes difficult to obtain and highly hazardous to both people and aquatic life. Thus, the best option is to use natural dyes because it has been illustrated that some plant extracts exhibit the characteristics of synthetic dyes, making them usable for their use. Since this research emphasizes a return to green chemistry, it was necessary to search for alternative environmentally friendly indicators that are readily available, simple to prepare, and can be used to detect the endpoint of the reaction. The purpose of this article was to explore nine different types of aqueous extracts from various plants that can be used as indicators in acid-base titrations. The results showed that, similar to phenolphthalein, all of the investigated plant extracts are appropriate for strong-acid and strong-base titration.  Moreover, hibiscus flower and cabbage leaf extracts are superior indicators for a strong-acid and strong-base titration to the synthesizers indicators. it was recommended that the use of these plant extracts as acid-base indicators should be combined in the teaching of acid-base titration. The amount of sodium hydroxide consumed at the endpoint were between 9.5 - 10 mL, while the pH of the solutions were between 6 - 9.7.


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How to Cite

Alabbsi, A., Abu Alassad, D., Abdalsamed, I., & Ahmida, K. (2023). A Study into Using Plant Extracts as Indicators for the Endpoint in the Acid-Base Titrations. Scientific Journal for Faculty of Science-Sirte University, 3(1), 109–114. https://doi.org/10.37375/sjfssu.v3i1.149

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