What is universal indicator ?

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Answer

Universal indicator is a pHindicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. ... Experiments with Yamada's universal indicator are also described in the Journal of Chemical Education.

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The universal indicator is used to know the strength of acid or base. Universal indicator is a mixture of several indicators. The universal indicatorshows different colours at different concentrations of hydrogen ions in a solution.

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Universal indicator is a mixture of several indicators.

The universal indicator is used to know the strength of acid or base.

The universal indicator shows different colours at different concentrations of hydrogen ions in a solution.

simple Language me🙂

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Universal indicator is ph scale(power of hydrogen).
It is maded by the mixture of many dyes such as litmus methyl orange.
it is discovered by Sorenson

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Nice question

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Universal Indicator: A Comprehensive Explanation

Universal indicator is a chemical solution used to determine the pH level of a substance. It is composed of a mixture of several different indicators, resulting in a solution that can display a wide range of colors. Each color corresponds to a specific pH value, allowing for easy identification and measurement.

Composition
Universal indicator is typically made by combining several different indicator dyes, such as phenolphthalein, bromothymol blue, methyl orange, and thymol blue. These dyes are chosen for their ability to exhibit distinct color changes at different pH levels. By combining them, a broader pH range can be covered, enabling accurate pH determination across a wide spectrum.

pH Measurement

To use universal indicator for pH measurement, a small amount of the solution is added to the substance being tested. The color that develops indicates the pH level of the substance. The color scale varies depending on the specific brand or formulation of the universal indicator, but generally follows a pattern similar to the one below:

Red: Highly acidic (pH 0-3)

Orange: Moderately acidic (pH 4-6)

Yellow: Weakly acidic (pH 6-7)

Green: Neutral (pH 7)

Blue: Weakly alkaline (pH 8-9)

Deep blue: Moderately alkaline (pH 10-12)

Purple: Highly alkaline (pH 13-14)

Applications
Universal indicator finds application in various scientific fields, including chemistry, biology, and environmental science. Some common uses include:

Acid-Base Titration: Universal indicator is used to determine the endpoint of an acid-base titration, where the pH of the solution changes from acidic to alkaline or vice versa.

Water Quality Testing: It is employed to assess the pH of water samples, helping to determine its suitability for various purposes.

Biological Experiments: Universal indicator is used in biological experiments to measure the pH of different solutions, such as cell culture media or nutrient solutions.

Chemical Analysis: It assists in identifying the acidity or alkalinity of various chemical substances, aiding in their characterization and analysis.

Conclusion
Universal indicator is a versatile chemical solution that allows for quick and easy pH measurement across a broad range of values. By utilizing a combination of indicator dyes, it provides a visual representation of the pH level of a substance. Its applications span various scientific disciplines, making it an essential tool for pH determination and analysis.

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