scholarly journals Isolation of Natural Acid Base Indicator from the Flower Extract of Sarca Asoca, Abelmoschus Esulentus, Hibisucs Cannabinus And Hibiscus Rosa Sinensis

2021 ◽  
pp. 132-134
Author(s):  
Deepali Mourya ◽  
Sushrut Maner ◽  
Mandar Lele
Keyword(s):  
Caustic Soda ◽  
Methanolic Extract ◽  
Hibiscus Cannabinus ◽  
Abelmoschus Esculentus ◽  
Acid Base ◽  
Saraca Asoca ◽  
Flower Extract ◽  
Synthetic Indicators ◽  
Hibiscus Rosa Sinensis ◽  
Acid Base Titration

The objective of this work is to use more plant indicators than chemical based indicators. Saraca asoca is a species of family Fabaceae and Abelmoschus esculentus and Hibiscus cannabinus is a species of family Malvaceae [1]. Indicator are very special chemicals, they change colour of the solution with change in pH by adding acid or alkali. In the present work acid base titration has been performed by using natural indicators. The natural indicator is prepared from the most commonly occurring flower Hibiscus cannabinus, Abelmoschus esculentus Saraca asoca and Hibiscus Rosa sinensis. Aqueous and methanolic extract of flower were used as natural indicator. One acid one base were selected for acid base titration. Vinegar is used as acid and caustic soda is used as base. The results obtained by the natural indicator are almost similar to the result given by the synthetic indicators. Thus, natural indicator from flowers can be used for acid base titration [2]. Using aqueous extract of flower as indicator is more economical and with the same accuracy of result as that given by synthetic indicators.

scholarly journals The Potential of Clitoria ternatea L. Extracts as an Alternative Indicator in Acid-Base Titration

2021 ◽  
Vol 5 (4) ◽  
pp. 340-352
Author(s):  
Camalin Bela Sukmaning Fitri* ◽  
Retno Aliyatul Fikroh
Keyword(s):  
Experimental Design ◽  
Base Material ◽  
Chemistry Curriculum ◽  
Acid Base ◽  
Flower Extract ◽  
Synthetic Indicators ◽  
Base Materials ◽  
Acid Base Titration ◽  
Acid And Base ◽  
Butterfly Pea

Experiments are an important part of the chemistry curriculum. An indicator in the form of a synthesis indicator is commonly used in acid-base materials experiments. The usage of synthetic indicators can result in waste that is both environmentally harmful and costly. The butterfly pea flower is one of the plants that contains anthocyanins, which have the potential to be used as an alternative indication of natural acids and bases. The study aims to determine the acid and base material curriculum and competency indicators, as well as the potential of butterfly pea flower extract as a substitute for synthesis indicators and the practicality of butterfly pea flower extract as a chemical experimental design in SMA/MA. This study employs a descriptive qualitative research method that includes literature review, observation, experimentation, and interviewing. The results showed that the relationship between acid-base materials and experiments was the determination of natural materials as acid-base indicators, the pH of the solution, the identification of acid-base properties, and acid-base titration. The butterfly pea flower indicator was produced from maceration extraction using 96% ethanol as the solvent. The butterfly pea flower indicator gives pink color at pH 1-2, reddish purple at pH 3, light purple at pH 4-5, turquoise at pH 6, bluish green at pH 7, light blue at pH 8-9, green at pH 10, yellowish green at pH 11, greenish yellow at pH 12-13, and yellow at pH 14. The titration step showed that butterfly pea flower indicators could replace synthetic indicators, namely phenolphthalein and methyl orange. Based on the analysis, the butterfly pea flower indicator can be used as an alternative indicator in acid base titration and an alternative experimental design in schools.

scholarly journals Use of Argyreia cuneata Flower Extract as a Natural Indicator in Acid Base Titration

2014 ◽  
Vol 4 (2) ◽  
pp. 1124-1127 ◽  
Author(s):  
N.V.Pimpodkar . ◽  
B.S.Surve . ◽  
S.H.Bhise .
Keyword(s):  
Acid Base ◽  
Flower Extract ◽  
Acid Base Titration

scholarly journals Utilization of Kalpataru Flower Extract (Hura crepitans Linn) as an Alternative Acid Base Indicator

2020 ◽  
Vol 9 (3) ◽  
pp. 148-157
Author(s):  
Bayu Riswanto ◽  
Sitti Aminah
Keyword(s):  
Strong Acid ◽  
Weak Acids ◽  
Acid Base ◽  
Flower Extract ◽  
Weak Bases ◽  
Base Solution ◽  
Acid Base Titration ◽  
Hura Crepitans ◽  
Dark Green ◽  
Strong Acids

Kalpataru flower (Hura crepitans Linn) is an anthocyanin-containing plant. This study aims to utilize extract from the kalpataru flower as an alternative acid base indicator and determine the type of acid-base titration suitable for extracting the kalpataru flower indicator. Kalpataru flowers are macerated with methanol solvent for around 2 hours. Kalpataru flower extract was tested as an indicator in acid-base solution, buffer, and compared with phenolphthalein and methyl orange for acid-base titration, namely: strong acids with strong bases, weak acids with strong bases, and weak bases with strong acids. The results obtained in this study were: indicator extract of brownish yellow kalpataru flowers, in strong red acids, in strong bases of dark green, in weak pink acids, and in weak bases in light green. In the buffer, the indicator extract of the kalpataru flower has a range of pH pH 4-5 (pink-colorless) and pH 9-11 (yellowish green-dark green). The indicator of kalpataru flower extract can be used on strong acid titration with strong bases, weak acids with strong bases and weak bases with strong acids. Kalpataru flower extract can be used as an acid-base indicator.

Hamelia patens Jacq Flower Extract as Indicator for Acid-Base Titration and Development of Litmus Paper

2019 ◽  
Vol 11 (3) ◽  
pp. 178
Author(s):  
Kadam Satwashila Shahajirao ◽  
Rupnar Kajal Gorakh ◽  
Salonkhe Snehal Ramchandra ◽  
Patil Shitalkumar Shivgonda
Keyword(s):  
Acid Base ◽  
Flower Extract ◽  
Acid Base Titration ◽  
Litmus Paper

scholarly journals Senna FLOWER EXTRACT AS AN INDICATOR FOR ACID-BASE TITRATION

2021 ◽  
Vol 14 (02) ◽  
pp. 1402-1407
Author(s):  
N. Pattarapongdilok ◽  
P. Malichim ◽  
N. Simmee ◽  
J. Sichaem
Keyword(s):  
Acid Base ◽  
Flower Extract ◽  
Acid Base Titration

scholarly journals Comparison of Color Change to pH Range and Acid-Base Titration Indicator Precision Test of Multiple Ethanol Extracts

2021 ◽  
Vol 19 (1) ◽  
pp. 1446
Author(s):  
Lilis Tuslinah ◽  
Anna Yuliana ◽  
Dian Arisnawati ◽  
Lina Rahmawati Rizkuloh
Keyword(s):  
Color Change ◽  
Secondary Data ◽  
Ethanol Extract ◽  
Acid Base ◽  
Color Changes ◽  
Synthetic Indicators ◽  
Significant Difference ◽  
Acid Base Titration ◽  
Ethanol Extracts ◽  
Ph Range

Natural indicators using anthocyanin compounds can be an alternative to synthetic indicators on acid-base titration because anthocyanin is an organic compound that is unstable with changes in pH. The extraction was carried out with ethanol because the compounds of anthocyanin were polar. This study was to ensure an ethanol extract of some plants could be used as an acid-base indicator that had a pH range of color change and the value of the equality parameter was not significantly different from the phenolphthalein indicator. The research method is to collect research journals on making natural indicators from ethanol extracts of various plants compared to phenolphthalein indicators so that secondary data from these journals can be processed statistically. Research results and conclusions: Based on the results of statistical data processing using the t-test there was no difference in the average pH of the phenolphthalein indicator with the average pH of ethanol extracts of adam air leaves (Rheo discolor), white frangipani flowers and Clitoria teratea L., with a significance value > 0.05 and the equality test (precision) had the requirements of good equality. HIGHLIGHTS Natural indicators are needed as a substitute for synthetic indicators in determining acid-base titrations; one of them is anthocyanin dye Research journals on making natural indicators from ethanol extracts of various plants compared to phenolphthalein indicators so that secondary data from these journals can be processed statistically There was no significant difference between the average pH of the phenolphthalein indicator and the average pH of the ethanol extract of Adam's Eve Leaves, ethanol extracts of white Cambodia flowers and ethanol extracts of Telang flowers in producing color changes GRAPHICAL ABSTRACT

scholarly journals Comparative Analysis of the Properties of Acid-Base Indicator of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) Flowers

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Stanley I. R. Okoduwa ◽  
Lovina O. Mbora ◽  
Matthew E. Adu ◽  
Ameh A. Adeyi
Keyword(s):  
Comparative Analysis ◽  
Solvent Extraction ◽  
Ph Value ◽  
Visible Region ◽  
Electromagnetic Spectrum ◽  
Acid Base ◽  
Soxhlet Extractor ◽  
Synthetic Indicators ◽  
Hibiscus Rosa Sinensis ◽  
Acid And Base

The need to develop effective alternative for synthetic indicators is the demand of present-day chemistry. The acid-base indicator properties of Rose (Rosa setigera), Allamanda (Allamanda cathartica), and Hibiscus (Hibiscus rosa-sinensis) flowers were examined. Colour pigments were extracted from the flowers via cold and solvent extraction using soxhlet extractor. The pH value of the extracts with wavelengths of absorption was determined using ultraviolet spectrophotometer. From the results obtained, all the extracts exhibited sharp contrast between their colours in acid and base. Their pH was found to be 5.5 for cold extract of Rose and 5.6 for solvent extraction, 5.24 for cold extract of a Hibiscus and 6.52 for solvent extraction, 5.35 for cold extract of Allamanda, and 5.45 for solvent extraction. The maximum wavelengths of absorption obtained for all the extract fall within the visible region of electromagnetic spectrum. These values are almost similar to that obtained from synthetic indicators. It is on these bases that we concluded that natural indicators could be an excellent replacement for synthetic indicators since they are cheap, readily available, simple to extract, not toxic, user and environmentally friendly.

scholarly journals Effectiveness of Calotropis Gigantean Linn Flower Extract as Indicator for Acid-Base Titration and Development of Litmus Paper

2019 ◽  
Vol 9 (3) ◽  
pp. 74-79
Author(s):  
Satwashila Shahajirao Kadam ◽  
Pravin Mhadev Salgar ◽  
  priyanka Tanaji   Sakate ◽  
Dr. Shitalkumar  S. Patil
Keyword(s):  
Acid Base ◽  
Flower Extract ◽  
Acid Base Titration ◽  
Litmus Paper

ETHANOLIC EXTRACT OF ARISTOLOCHIA BRACTEOLATA FLOWER AS A NATURAL INDICATOR FOR ACID-BASE TITRATION

INDIAN DRUGS ◽  
2019 ◽  
Vol 56 (03) ◽  
pp. 77-79
Author(s):  
G Vambhurkar ◽  
A. Jagtap ◽  
A. Gavade ◽  
M Kengar ◽  
M Bhutkar ◽  
...  
Keyword(s):  
Ethanolic Extract ◽  
Strong Acid ◽  
Weak Acid ◽  
Weak Base ◽  
Acid Base ◽  
Ph Indicator ◽  
Strong Base ◽  
Color Changes ◽  
Synthetic Indicators ◽  
Acid Base Titration

In acid-base titration or acid-base neutralization reaction the change in color due to change pH of the solution is caused due to a third substance which is termed as acid-base indicator or pH indicator. Every indicator shows different range of colors at different pH ranges. Synthetic indicators have been widely employed as indicators in acid-base titrations; however, due to environmental pollution, availability and cost, natural compounds are best alternates. Natural pigments in plants are highly colored substances and may show sharp color changes with variation in pH. In the present study an attempt has been made to extract natural indicator from flower of Aristolochia bracteolate. The equivalence points of the titrations namely strong acid-strong base, strong acid-weak base, weak acid-strong base and weak acid weak base titrations, using flower extract of A. bracteolate were coincident with the equivalence points obtained by the synthetic indicator phenolpthalein. From the results of the study, it may be concluded that ethanolic extract of A. bracteolate flower as an indicator for acid-base titration could be effectively employed as a substitute to the synthetic acid-base indicators.

scholarly journals GREEN CHEMISTRY: ROSELLE’S COROLLA EXTRACT AS A SUBSTITUTE FOR HAZARDOUS INTERNAL INDICATORS IN VOLUMETRIC ANALYSIS

2019 ◽  
Vol 7 (9) ◽  
pp. 118-122
Author(s):  
R. F. Pagariya
Keyword(s):  
Strong Acid ◽  
Weak Acid ◽  
Basic Solution ◽  
Phenol Red ◽  
Weak Base ◽  
Acid Base ◽  
Ph Indicator ◽  
Strong Base ◽  
Synthetic Indicators ◽  
Acid Base Titration

Indicators used in acid-base titration show well marked changes of colour in certain intervals of pH. Most of these indicators are organic dyes and are of synthetic origin. Today synthetic indicators are the choice of neutralization titrations. But due to environmental pollution, availability and cost, the search for natural compounds as an acid-base indicator was started. The present work highlights the use of the ethanolic extract of the corolla of Roselle (Hibiscus sabdariffa) as a pH indicator in strong acid-strong base, strong acid weak base, weak acid strong base and weak acid-weak base titrations. This natural indicator is easy to extract as well as easily available. The results showed that the Roselle’s corolla indicator gave red color in acidic solution, while green in basic solution. The comparison indicators used in this research were phenolphthalein, methyl red and phenol red. Hopeful results were obtained when it was compared against standard synthetic indicators. The equivalence points obtained match with the equivalence points obtained by standard indicators. Therefore this natural indicator is found to be useful, economical, simple, precise and eco-friendly for acid base titration.

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