This titration curve is produced when an acid is titrated with a sodium hydroxide solution of the same concentration - HSC - SSCE Chemistry - Question 16 - 2021 - Paper 1

To determine the number of acidic protons in this acid based on the titration curve, we can analyze the shape of the curve.

1. Identify the equivalence point: The equivalence point is the point where the curve has a steep increase in pH, indicating that all the acidic protons have reacted with the base.

2. Count the slopes: Each steep segment of the curve generally indicates the presence of one acidic proton. In this case, there are two significant inflection points leading us to identify that this acid contributes two protons.

3. Conclusion: Therefore, the acid possesses 2 acidic protons. The correct answer is B.