What This Document Is
This document is a laboratory report detailing an experiment conducted in Oregon State University’s CH 233 General Chemistry course. Specifically, it presents the findings of a titration experiment focused on a mixture containing phosphoric acid (H3PO4) and hydrochloric acid (HCl). The report was completed by a group of four students: Ksenia Basargin, Dylan Gregory, Taylor Camfield-Bronstein, and Nick Bowermaster, on October 5, 2018.
Why This Document Matters
This report is intended for the instructor of CH 233 to assess the students’ understanding of acid-base titration techniques, data analysis, and the determination of acid dissociation constants (Ka). It demonstrates the application of laboratory skills and the ability to interpret experimental results. It serves as a record of the group’s work and conclusions.
Common Limitations or Challenges
This report represents a single group’s experimental results and analysis. It does not serve as a comprehensive guide to titration or phosphoric acid chemistry. It focuses solely on the specific experiment conducted and the data obtained by this particular group.
What This Document Provides
The full report includes: a summary of the experiment, calculations for the concentration of phosphoric acid and hydrochloric acid within the mixture, experimentally determined values for the first and second acid dissociation constants (Ka1 and Ka2) of phosphoric acid, a comparison of these values to literature values (including percent error calculations), and an explanation of why the third dissociation constant (Ka3) could not be determined. It also includes the raw data and graphs generated during the titration process (referenced as “specific results”). This preview does *not* include the specific data tables, graphs, or detailed calculations presented within the full report.
