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211 2005_wk1 - Analytical Chemistry Chemistry 211...

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Unformatted text preview: Analytical Chemistry Chemistry 211 Quantitative Analysis Lecturers: Dr. Allen (first-half) (firstDr. Gustafson (second-half) (secondDr. Allen's Office: Room 3105 in Newman & Wolfrom (100 W. 18th Ave) My website will be used for distribution of some materials for the first half of the course: the http://www.chemistry.ohio-state.edu/~allen/courses.htm http://www.chemistry.ohioWebCT will be used throughout the quarter for posting grades: https://webct.mps.ohio-state.edu/webct/public/home.pl https://webct.mps.ohioemail: [email protected] [email protected]: 292-4707 292- Homework: Weeks 1& 2 Chapters 1 & 3, all even numbered problems answers are in the back of the book fully worked-out answers are in the solutions manual HW is not collected, but highly recommended! Introduction to analytical chemistry What is analytical chemistry? Qualitative Versus Quantitative What do we want to know? Do we need to obtain the sample? Do we need to pretreat the sample? Do we need to separate the sample from its matrix? Make the appropriate measurement! Will we need to use optical spectroscopy, gravimetric analysis, mass spectroscopy? Laboratory technique is critically important! For example: Presentation of the Data We need to present the data in a logical manner, and in a way that allows us to interpret the data accurately. Review of Fundamentals 1. 2. 3. 4. 5. 6. Concentration units Percent concentration Accuracy vs Precision Determinate vs. Indeterminate Errors Significant Figures Rounding Error Data Analysis 1. 2. 3. 4. 5. 6. 7. Standard Deviation Propagation of Error & Significant Figures Confidence Limits Testing Significance Q Test for rejection of data points Small data set statistics Linear least squares analysis Calibration curves ...
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