(2)Walk the reader through your thought process to the conclusions you make. Use words; do not simply turn your equations into paragraph form. Ex: How do you know that KHP/NaOH moles were equal? Discuss the relationship between the endpoint and the color change of the indicator and the equivalence point. What constitutes an appropriate indicator? How would you select an appropriate indicator? Conclusion(4 pts)Length: 1 healthy paragraph or 2 short. Restate the purpose of the lab and discuss if your results were or were not what you expected and why that may be. If a theoretical value for any of your results is provided or can be found, calculate a percent error or percent yeild for your results. Outline specific possible sources of error. Include only possible and reasonable errors - human error is not a valid source as it is always present. What other sources of error can you think of? Inappropriate sources of error include, “the calculations might have been done wrong”, “the correct amount wasn’t used”, “the wrong chemical was added”, etc. What’s the precision of the instruments you used? Would these affect your results? Are your results precise? Accurate? How do you know? What is the difference between the two? REFERENCES (1) Fish, W. W. Rapid Colorimetric Micromethod for Quantitation of Complexed Iron in Biological Samples. Methods Enzymol. 1988, 54 , 357–364. (2) Riemer, J.; Hoepken, H. H.; Czerwinska, H.; Robinson, S. R.; Dringen, R. Colorimetric Ferrozine-Based Assay for the Quantitation of Iron in Cultured Cells. Anal. Biochem. 2004, 331 (2), 370–375. Miller, Jac 3
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- Fall '14