Unformatted text preview: as Zn 2 P 2 O 7 . If the Zn 2 P 2 O 7 weighed 0.6611 g, what was the percent Zn in the ore? 5. Solve the following problem: (50.00 ± 0.02 - 37.00 ± 02)(0.1395 ± 0.0005) 6. What are the problems associated with drying a sample prior to running the analysis and how are they normally handled? 7. How are elemental (C, H, etc.) analyses performed today? Give a general description of the procedure. 8. What is a confidence interval? What are (is) the assumptions in our calculations? 8. How many analyses should we do if we want to be 95% certain that the error is less than 5% (0.05) if the standard deviation is 6% (0.06)? 7. Why do we normally do analyses in triplicate rather than some other number of analyses?...
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This note was uploaded on 10/01/2011 for the course CHEM 3332 taught by Professor Thummel during the Spring '08 term at University of Houston.
- Spring '08