What is the change in colour of methyl orange in the acidic and basic medium?

Indicators are substances whose solutions change colour due to changes in pH. These are called acid-base indicators. They are usually weak acids or bases, but their conjugate base or acid forms have different colours due to differences in their absorption spectra.

There are many types of Indicators.

Natural Indicators - Litmus, Red cabbage, Rosewater, Turmeric. 

Synthetic indicators- Methyl orange, Phenolphthalein, Methyl red, Congo red etc. Olfactory Indicators - Garlic, Onion etc. Universal Indicator - Litmus etc.

Methyl Orange is a synthetic pH indicator used in titration because of its clear and distinct colour variance at different pH values. Methyl orange shows a red colour in acidic medium and yellow colour in basic medium.


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