Question

to solution of hydrochloric acid 3 drops of methylene orange is added what will be the change in the colour of solution and why​

Answer 1

Answer:

Methyl orange (MO), as you know, is an acid-base indicator. The problem with those is that they do not distinguish between acidic and basic medium, but rather between different pHs. ... That leads us to ~0.002 mol of HCl added and to pH lower than 3, so the MO would turn red.