You are titrating an acidic solution with a basic one, and just realized you forgot to add the indicator that tells you when the equivalence point is reached. In this titration, the indicator turns blue at the equivalence point from an initially colorless solution. You quickly grab a bottle of indicator and throw some into your titration beaker, and the whole solution turns dark blue.

What do you do now?

a. The amount of base added is less than the amount of acid initially present. You should continue titrating, then record the volume of base added and calculate the amount of acid in the initial solution.

b. The amount of base added is now just the same as the amount of acid initially present. You should record the volume of base added and calculate the amount of acid in the initial solution.

c. Experiment went wrong, because the color of the indicator differs from what it should be in a neutral solution. You have to do a new bitration.

d. The amount of base added is already greater than the amount of acid initially present. You should record the volume of base added, then itrate the mixture in the beaker with a standard acid solution