Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its dissociated aqueous solution.


HC2H3O2(aq) Double headed arrow. H+(aq) + C2H3O2–(aq)
yellow blue

What will be the color of the solution if a large amount of H2CO3 is added?

The solution will remain yellow.
The solution will turn blue.
The solution will turn pink.
The solution will turn green.