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Unformatted text preview: CHEMISTRY 142 EXAM II April 5, 2007 Section 004 Name:_____________________________________ Signature: __________________________________ (your signature above is your honor pledge) General Exam Information: 1. Pages of useful information are attached to the end of the exam. These pages may be removed. 2. Remember to use Significant Figures. Points will be deducted if answers lack proper significant figures. 3. Show your work as possible as neatly as possible. I can only give partial credit for work I can follow and read. 4. Read questions completely and answer the question that was asked. Section Score Part I (15) Part II (28) Part III (14) Part IV (36) Bonus (2) Total (93) Part I: Fill in the Blank. Fill in the blank with the term that best describes the phrase (3 pts each). 1. _________________ is a point during a chemical reaction when what exists is neither a product nor reactant but a unstable species with partial bonds that cannot be isolated. 2. _________________ is a number equal to a particular ratio of equilibrium concentrations of product and reactant at a particular temperature 3. _________________ is an acid-base definition that describes a base as any species that accepts an H + 4. _________________ is a term used to describe an acid with more than one ionizable proton 5. _________________ is the name of the phenomenon/ principle that describes how buffers work Part II Multiple Choice. Select the correct answer for each of the following questions. (4 pts each) 1. The reaction of nitric oxide to form dinitrogen oxide and nitrogen dioxide has a negative H value....
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- Spring '08