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Unformatted text preview: gonzales (pag757) Pre-lab 3 Lyon (52635) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. This assignment is due by 8AM on your next lecture day. The questions cover experi- ment 3. 001 10.0 points What is the main objective of qualitative analysis? 1. to carry a chemical reaction to comple- tion 2. to improve the quality of an analysis 3. to determine what a sample is correct 4. to determine the amount of sample present Explanation: In qualitative analysis, you use the physical and/or chemical properties of a substance to determine what the sample is made of. 002 10.0 points How does quantitative analysis differ from qualitative analysis in terms of the informa- tion you are interested in? 1. Qualitative analysis and quantitative analysis are both intended to determine the same information, they just do it through dif- ferent means. 2. Qualitative analysis is higher quality than quantitative analysis. 3. In quantitative analysis you want to know how much sample is present, and in qualita- tive analysis you want to determine what the sample is. correct 4. Qualitative analysis improves the results of quantitative analysis. Explanation: Qualitative analysis determines what some- thing is (for example, is the acid HCl, H 2 SO 4 , or HNO 3 ?). Quantitative analysis is a mea- sure of how much of something, and the an- swer is always a number (for example, what is the concentration of the acid?). 003 10.0 points What do you hope to learn from working with the known solutions in Part 1 of the experimental procedure?...
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This note was uploaded on 03/15/2010 for the course CH 52645 taught by Professor Lyon during the Spring '10 term at University of Texas at Austin.
- Spring '10