http://www.lazyreign.com/colour-base/
Colour Base
What colour does Methyl Orange turn in a base? How about in an acid?
In my understanding, methyl orange turns yellow in a base and stays orange in an acid.
But I’ve had sources say that methyl orange will turn blue in a base and pink in an acid?
Methyl orange
Methyl orange is one of the indicators commonly used in titrations. In an alkaline solution, methyl orange is yellow.Now, you might think that when you add an acid, the hydrogen ion would be picked up by the negatively charged oxygen. That’s the obvious place for it to go. Not so!
In fact, the hydrogen ion attaches to one of the nitrogens in the nitrogen-nitrogen double bond to give a structure.
In the methyl orange case, the half-way stage where the mixture of red and yellow produces an orange colour happens at pH 3.7 – nowhere near neutral.
