Question

When methyl orange is added to a solution it turns into red colour. T
A) What is the nature of the solution ?
B) Which reaction takes place when base is added to it?​

Answer 1

Indicator colors

In a solution that decreases in acidity, methyl orange moves from the colour red to orange and finally to yellow with the opposite occurring for a solution increasing in acidity. In an acid, it is reddish and in alkali, it is yellow. Methyl orange has a pKa of 3.47 in water at 25 °C (77 °F).