Methyl Orange Indicator
Water soluble azo dye, methyl orange, is popularly known as pH indicator which is generally used in the titration. It is used in titration because of its colour variations at different pH levels. Methyl Orange is not much strong indicator like litmus. Methyl orange makes only a narrow spectrum in colour band . In acid solution, methyl orange turns into red colour and in base solution, methyl orange turns into yellow colour.
Colour Change of Methyl Orange
Generally methyl orange is found in orange colour. But when methyl orange is used as an indicator of acid solution, it becomes red from yellow/orange colour. Similarly, when it is used in base solution, methyl orange becomes yellow. This is the property of Color change of methyl orange.
Methyl Orange in Acid
In a Acidic medium, methyl orange turns red from orange.
It is popularly used in acid titration because it changes colour at the pKa of a mid-strength acid. Methyl orange is not similar to a universal indicator litmus, because it does not have a complete spectrum of colour transition, however it does have a sharp end point. When Methyl Orange comes into contact with water then it breaks down into orange neutral molecules. Methyl Orange is a weak acid.
Methyl Orange in Base
By the various pH levels of methyl orange, we use it as an indicator. In base solution, Methyl orange turns into yellow colour from orange colour.
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