McMullen_exp16_graded

McMullen_exp16_graded - Experiment 16 Identification of an...

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Unformatted text preview: Experiment 16 Identification of an Unknown Acid Spring 2010 Name Chelsea McMullen Lab Section 428 Point Summary (See Blackboard for detailed grading rubric) Superior Excellent Satisfactory Fair Poor Omitted Introduction Purpose of Report 2.5 Goals of Experiment 2.5 Materials and Methods 5 Results and Discussion Description of data 2.5 Data Tables 2.5 Data Table Titles 2.5 Graphs 2.5 Figure Captions Sample Calculations 2.5 Systematic Error 7 Random Error 8 Discussion of discrepancies 10 Other 2.5 Unknown Identification 50 TOTAL POINTS 100 TA Comments/Suggestions: Good Job! C HEMISTRY 102L R EPORT T EMPLATE EXPT. Identification of an Unknown Acid 16 16 Introduction The purpose of this report is to use the equivalence point and half equivalence point determined from the titration curve created to determine the identity of an unknown acid. The objective of the experiment was to conduct a titration of a pre-determined concentration of NaOH and an unknown acid solution. A titration curve was created by using a pH sensor during the titration, and the volume of base, equivalence point and half equivalence point were determined. These values were used to determine the molar mass, and the identity of the unknown substance. Materials and Methods The procedure for this experiment was taken from UNC Chemistry 102L Lab Manual, Experiment 16: Identification of and Unknown Acid. There were no deviations from the procedure. A buret was conditioned and filled with the NaOH solution that was prepared last week. About 0.3 to 0.4 g of the assigned unknown acid was weighed and added into a clean 100mL beaker. The exact weight was recorded. The acid was distilled with 50 mL of water. A stir bar was placed in the beaker and the beaker was placed on a stir plate, and stirred slowly for five minutes....
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This note was uploaded on 04/20/2010 for the course CHEM 102L taught by Professor N/a during the Spring '07 term at UNC.

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McMullen_exp16_graded - Experiment 16 Identification of an...

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