TY - JOUR AU - Riyanti, Riyanti AU - Marwoto, Putut AU - Priatmoko, Sigit AU - Cahyono, Edy PY - 2022/10/31 Y2 - 2024/03/28 TI - The The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora coccinea Linn) with Variances of Solvent and Soaking Period JF - Jurnal Penelitian Pendidikan IPA JA - jppipa, pendidikan ipa, fisika, biologi, kimia VL - 8 IS - 4 SE - Research Articles DO - 10.29303/jppipa.v8i4.1494 UR - https://jppipa.unram.ac.id/index.php/jppipa/article/view/1494 SP - 1694-1699 AB - <p>This research developed a paper indicator made from extracted Ashoka flower, <em>Ixora coccinea Linn, </em>with solvent and the soaking period variances. Ashoka flower is a plant containing anthocyanin pigment. The plant is sensitive to acidic levels of pH. The content of the Ashoka flower brings significant potential as a natural indicator. The researchers extracted the anthocyanin pigment of the lower with the maceration method with 96% and 70% ethanol solvents for 24 hours. The researchers calibrated the extracted ethanol with buffer solution under pH 1-12. Then, the researchers cut 42 Whatman papers sized ±5x1 cm. The researchers put the papers into the mixtures of the extracted ethanol within 48 - 72 hours of the soaking period. After that, the researchers dried out the papers and examined the solution in terms of acid-base level. The papers made of extracted ethanol from Ashoka flower on solutions of HCl, CH<sub>3</sub>COOH, NH<sub>4</sub>OH, NaOH had their colors changed into brighter pink, pink, light green, and green-brownish. The color changes on the developed paper indicators made of extracted ethanol from Ashoka were extremely clear with a condition of 96% ethanol solution and 72 hours of soaking period.</p> ER -