What is methyorange and is it a pure substance or a mixture?

1 Answer
Sep 22, 2015

It's an organic compound used as an acid-base indicator; it's a pure substance.


Methyl orange is an organic compound of formula #C_14H_14N_3SO_3Na#and structure:

It's useful because it's a compound that has different colours depending on the pH. So a drop or two be used as an indicator in acid-base titrations as an excess of acid causes the reaction:

#color(orange)(C_14H_14N_3SO_3Na) + HCl rarr color(red)(C_14H_14N_3SO_3H) + NaCl#