Question

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

Answer 1

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

Explanation:

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`