This problem requires information that is not provided in the image, specifically the concentration of solution B (NaOH), the volume of solution B used in the titration, the average volume of solution

This problem requires information that is not provided in the image, specifically the concentration of solution B (NaOH), the volume of solution B used in the titration, the average volume of solution A (H₂SO₄) from the titration, and the initial mass of impure H₂SO₄. To solve the problem, we will make the following common assumptions for a titration experiment:

Assumptions:

1. The concentration of solution B (NaOH) is $0.100 \text{ mol/dm}^3$.
2. The volume of solution B (NaOH) pipetted for titration is $25.0 \text{ cm}^3$.
3. The average volume of solution A (H₂SO₄) used from the burette (titre)