General Properties of Methyl Orange

What is Methyl Orange?

Methyl Orange is a chemical indicator that identifies whether a substance is basic or acidic. It is abbreviated as MeO. Methyl orange, a popular indicator is used for titration. During titration, it gives different colors at different pH values. Methyl orange is a weak base....

Structure of Methyl Orange

The structure of methyl orange consists of a central azo group (―N=N―), which is the characteristic feature of azo dyes. This azo group connects two aromatic rings: a benzene ring and a naphthalene ring. One of the nitrogen atoms in the azo group is protonated and carries a positive charge when the indicator is in its acidic form. The other nitrogen atom is connected to a sodium atom and a sulfonate group, which contribute to the water solubility of methyl orange. The structure of Methyl Orange is shown below:...

General Properties of Methyl Orange

Methyl Orange has some important properties. These properties are given below in the box....

Preparation of Methyl Orange

Methyl Orange is generally found in powdered form. To make a solution of methyl orange we have to dissolve 0.1g of methyl orange powder in per 100cc of distilled water. However, the methyl orange solution which is for indicator is more sensitive and hence prepared by dissolving only 0.02 gram of methyl orange in 100cc of water...

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....

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:...

Applications of Methyl Orange

The uses and applications of Methyl Orange are given below:...

Conclusion

As an indicator for titration, Methyl Orange has a significant importance. It turns red from orange in Acidic conditions and turns yellow in alkaline conditions. As an indicator, methyl orange is used in laboratories as well as in industries. It has some harmful effects too....

Frequently Asked Questions on Methyl Orange

What is the Original Colour of Methyl Orange?...