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Cassava Leaf Extract as an Acid-Base Indicator
Abstract
This research was conducted to test the feasibility of cassava (Manihot esculenta) leaf extracts as acid-base indicator. There is a growing need to utilize indigenous resources as materials in the laboratory. The results of this study can be a basis for use of cassava, a locally available plant in the country, as an important aid in chemistry.
The crude leaf extracts obtained from homogenized cassava leaves were added to chemical compounds with varying strengths in acidity and basicity (strong and weak acids and bases). Color changes were observed and recorded after the application of the extracts. A pH meter was used to determine the ability of the extract to promote color transformation in the different solutions of acids and bases. It was found that extracts from the said plant have the ability to indicate the basicity of a particular chemical substance.
Introduction
Chemical compounds can be classified as acidic, basic, or neutral substances based on several conditions. One factor considered is the color reaction which can be observed through the use of indicators. An indicator is a substance that changes color, depending on whether it is placed in an acidic solution or basic solution. Acid-base indicators are dyes that are themselves weak acids and weak bases. One indicator that almost everyone associates with acids and bases is the litmus, which has the ability to change color in response to an acid or base. Phenolphthalein is another common indicator used by beginners in Chemistry because its color change is very obvious, making it easy to use. There are many other indicators that change color at different pH levels, and so are useful for different purposes. Another commonly used indicator, the pH paper, contains a mixture of different indicators that change colors at different pH levels. For convenience, many laboratories opt to use pH meters or pH pens.
Many plant pigments found in nature can be used quite effectively as acid-base indicators. The dyes in blueberries and red cabbages belong to a family of molecules called anthocyanins. This family of molecules is responsible for the color found in radishes, eggplants, and numerous flowers. The anthocyanins are water-soluble and have colors that are dependent upon the pH of the reacting solution. In this study, the researcher tested the feasibility of Cassava leaf extract as an acid-base indicator. Cassava leaves contain hydrocyanic acid, which is a weak acid.
What else can I help you with?
What component in some flowers makes a good pH indicator?
Anthocyanins are the components found in some flowers that act as a good pH indicator. They change color in response to changes in pH levels, making them useful for determining whether a solution is acidic or basic. Examples of flowers containing anthocyanins include hydrangeas and red cabbage.
What makes a good pH indicator?
A good pH indicator should have a distinct color change at a specific pH range, be soluble in the solvent being used, and be stable over a range of conditions. It should also be non-toxic and easy to use.
What chemical indicator do you use for starch?
Starch is not the indicator. Iodine is the indicator of starch.
What is a good indicator of a person's age?
One good indicator of a person's age is looking at physical features such as wrinkles, gray hair, and skin texture. Additionally, people's cultural references or the music, movies, and events they mention can also provide clues about their age. Lastly, the way a person talks or their use of slang and language can sometimes indicate their approximate age.
What is a good indicator of a person's age?
The year they were born
What makes dye a good indicator?
just don't ask me i hate chemistry.
Is cassava bread good for diabetic?
Yes
What component in some flowers makes a good pH indicator?
Anthocyanins are the components found in some flowers that act as a good pH indicator. They change color in response to changes in pH levels, making them useful for determining whether a solution is acidic or basic. Examples of flowers containing anthocyanins include hydrangeas and red cabbage.
Why is red cabbage indicator not a good experiment to measure buffering capacity?
A buffer absorbs or releases excess hydrogen ions, making the solution hold at a steady pH. Since red cabbage indicator makes a good pH indicator, it has a neutral pH. any amount of acids or bases added would change the pH of the red cabbage juices. If it made a good buffer, it would not make a good pH indicator.
How do you make a vitamin c indicator?
Iodine makes a good indicator. The iodine will blend into the surrounding color. Once their is no more vitamin c then the iodine will start to chemically combine with any starches
What are the advantages of GNP?
- it is a good indicator of the state of the economy and its provision of services - often used to rank countries which makes it easier to compare them.
What is cassava cake?
See the link below for a Cassava Cake recipe.
What is a good sentence using the word indicator?
The temperature indicator is called a thermometer. The birds flying south are a good indicator of winter's approach.
What is a good property of an indicator name two?
What is a goodproperty of a indicator?
What makes a good pH indicator?
A good pH indicator should have a distinct color change at a specific pH range, be soluble in the solvent being used, and be stable over a range of conditions. It should also be non-toxic and easy to use.
Which soil requirement does cassava need?
Cassava grows best in well-drained soils that are deep, sandy or loamy, and rich in organic matter. It prefers a soil pH between 5.5 and 6.5 for optimal growth and development. Additionally, cassava does well in soils with good fertility and proper moisture retention.
Sentence for indicator?
Example sentence - Her childish behavior is a good indicator of her maturity level.
