Experiment 16 r

Experiment 16 r - Experiment 16 Identification of an...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Experiment 16 – Identification of an Unknown Acid Summer 2010 Name TD Khang Lab Section 409 Point Summary (See Blackboard for detailed grading rubric) Superior Excellent Satisfactory Fair Poor Omitted Introduction •Purpose of Report •Goals of Experiment Materials and Methods Results and Discussion •Description of data •Data Tables •Data Table Titles •Graphs •Figure Captions •Sample Calculations •Systematic Error •Random Error Discussion of discrepancies Other Unknown Identification TOTAL POINTS TA Comments/Suggestions:
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
C HEMISTRY 102L R EPORT T EMPLATE EXPT. Identification of an Unknown Acid 16 16 Introduction The purpose of this experiment is to determine the identity of an unknown acid through an acid- base titration. The base involved is a sample prepared last experiment of NaOH. The analysis of titration curve of the acid-base titration will allow experimenters to determine the identity of the unknown acid. The goals of the experiment were to determine the half-equivalence point and the molar mass to ultimately determine the identification of the unknown acid. The half-equivalence point is halfway between equivalence points. The half-equivalence was the point at which pH of the acid is equal to the pKa of the acid. Another goal was to determine the molar mass of the unknown acid from the titration curve. This was completed by obtaining the volume of the NaOH titrated at the equivalence point. The equivalence point is where the moles of acid equals the moles of base. The volume at equivalence point is determined by the 1 st derivative plot. He equivalence point is the location of the curve which has the greatest slope. The volume at equivalence point and the concentration of NaOH were used to determine the moles of acid involved. The mass of unknown acid used and the moles of acid involved were used to determine the molar mass. Materials and Methods A buret was conditioned and filled with the NaOH solution prepared and standardized last experiment. A mass of 0.3 to 0.4 grams of the assigned unknown acid was weighed and recorded in Data Table 1. The measured amount of unknown acid was placed into a clean 100-mL beaker. The sample of unknown acid was dissolved with 25 mL of ethanol in a beaker. A stir bar was placed in the solution and the solution was stirred until the solid sample of acid was completely dissolved. As the solution was
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern