Post-Lab Questions

1. What were the concentrations of HCl and H₂SO₄ in the two solutions?

2. We used a 25.00 mL volumetric pipet for the HCl and a 10.00 mL volumetric

pipet for the H₂SO₄. Why do you think we used different volumes for the two

titrations when the molarities of the two acids were similar?

3. If you were going too quickly as the equivalence point was reached and

accidentally added more than a drop to cause the color to change, how would

that error impact your calculated molarity of the acid (too high, too low, no

change)? Explain the logic for your answer.

4. If you did not rinse your buret with NaOH before filling it, how would that

impact the actual molarity of the NaOH in the buret?

5. What part of performing the titration did you find most difficult? We will be

performing titrations again the next two weeks. What tips/tricks do you want

to make sure to remember or get additional help with for the next lab?

References

John C. Goeltz and Lia A. Cuevas. “Guided Inquiry Activity for Teaching Titration

Through Total Titratable Acidity in a General Chemistry Laboratory Course.”

Journal of Chemical Education, 2021, 98 (3), 882-887. DOI: 10.1021/

acs.jchemed.0c01198.

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