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Unformatted text preview: pokharel (yp624) – Pre-lab 3 – Lyon – (53295) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 2.0 points What is the main objective of qualitative analysis? 1. to carry a chemical reaction to comple- tion 2. to determine what a sample is correct 3. to determine the amount of sample present 4. to improve the quality of an analysis Explanation: In qualitative analysis, you use the physical and/or chemical properties of a substance to determine what the sample is made of. 002 2.0 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. 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 3. Qualitative analysis is higher quality than quantitative analysis. 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?)....
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This note was uploaded on 09/25/2010 for the course PHYS 302L taught by Professor Tsoi during the Spring '10 term at University of Texas.
- Spring '10