Extraction and Evaluation of Some Natural Flower Pigments: an Improvised Natural Indicator for Acid-base Titration
Year: 2025
Type: article
Abstract: A member of the different families, these flowers are most widely cultivated ornamental bulbous plants for its intriguing blooms across the world. Objective: The current study focuses on the extraction and assessment of an acid-base indicator from a Tabernaemontana divaricata, Brugmansia suaveolens, Hibiscus rosa-sinensis (White) and Campsis grandiflora species that is environmentally beneficial and native to the area. Methods: In the current investigation, acid-base titrations of four distinct types—strong acid against a strong base, strong acid against a weak base, weak acid against a strong base, and weak acid against a weak base—were conducted. Two bases (NaOH and NH4OH) and two acids (HCl and CH3COOH) were chosen for the acid-base titration. These bases and acids were utilised at a concentration of 0.1N. Result: Natural indicators are promising when compared to commercially available synthetic acid-base indicators like methyl orange and phenolphthalein because they exhibit a sharp and dramatic colourb change near the neutralizing point. Conclusion: The use of Tabernaemontana divaricata, Brugmansia suaveolens, Hibiscus rosa-sinensis (White) and Campsis grandiflora flower extract as an indicator in all kinds of acid base titrations is also determined to be advantageous due to its affordability, eco-friendliness
DOI: 10.53555/mz26db37
Authors: Suchitra Sharma, Amit Babu, Vikas Saxena
Subfield: Physical and Theoretical Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4417328621
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