Question

(a) Which is the stronger acid-the acidic form of the indicator bromocresol green or the acidic form of methyl orange?

Short answer

Methyl orange is more acidic than the bromocresol green indicator.

Step-by-step solution

Acid and Base.

Acid is something that releases protons in the aqueous solution. Acids show a pH of less than 7.

Indicator.

An indicator is a chemical substance that alters color when an acid or base is present.

Indicators are often mildly acidic or basic and originate from plant pigments.

Step 3:Methyl orange is stronger acid in an acidic form.

Methyl orange is used in strong acid and weak base titration. It acts as a strong acid in this type of titration because it changes its primary color into acidic.

The pH of the solution, prepared from bromocresol green, is between 3.8 to 5.4, and that of methyl orange, is 3.1 to 4.4.

Methyl orange is a better indicator as it shows a distinct color shift of even mild-strength acids.