Difference between Phenolphthalein and Methyl Orange
Methyl Orange and phenolphthalein are two indicators apart from litmus paper which is used in identification of acid and base. The difference between the methyl orange and phenolphthalein are described below:
Parameters |
Methyl Orange |
Phenolphthalein |
---|---|---|
In Acidic medium |
Methyl orange turns red from orange. |
Phenolphthalein remains colourless in Acidic conditions. |
In Alkaline condition |
Methyl orange turns into yellow colour. |
Phenolphthalein turns into pink colour. |
pH value |
The pH value of Methyl Orange ranges from 3.1 to 4.4 |
The pH value of phenolphthalein ranges from 8.2 to 10.0 |
pKa |
The pKa of methyl orange is 3.5 |
The pKa of phenolphthalein is 9.4 |
Methyl Orange
Methyl Orange is an azo dye which is soluble in water. It is an organic compound composed of carbon, hydrogen, nitrogen, sodium, oxygen and sulphur. Methyl Orange doesn’t react permanently with acids or bases. Its effective pH value ranges from pH 3.1 to pH 4.4. Methyl orange is not similar to litmus paper because methyl orange has a very low range compared to litmus. Methyl orange doesn’t have a full spectrum of colors.
Table of Content
- What is Methyl Orange?
- Structure of Methyl Orange
- General Properties of Methyl Orange
- Preparation of Methyl Orange
- Methyl Orange Indicator
- Difference between Phenolphthalein and Methyl Orange
- Applications of Methyl Orange
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