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Exam 1 2004 - CHE 226 ANALYTICAL CHEMISTRY Fall 2004 EXAM I...

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CHE 226 ANALYTICAL CHEMISTRY Fall 2004 EXAM I – September 23, 2004 Name ______________________________ WRITE YOUR NAME ON EACH EXAM PAGE NOW . THERE ARE 8 QUESTIONS AND 106 PERCENT TOTAL IN THIS EXAM. Show clearly all work on these pages. Use the proper number of significant figures and the correct units in all final answers . You must show your calculations and/or reasoning, including equations , on a question to obtain any credit; no credit for answers appearing out of the blue. Your work must be understandable at the time it is being graded to obtain any partial credit . You do not have to do the final arithmetic on a question unless you need to have a numerical value for the next part of a question, as long as the answer is expressed in its final form and all algebraic manipulations have been made . Very little will be subtracted for routine arithmetic errors, but all numerical answers must be shown to the proper number of significant figures. Programmable calculators must have all memory erased. A calculator may be used, but not shared with anyone else. Tables of data and other information that may be useful are appended to the back of the exam. Use the backs of the pages as scrap paper. Anything written on the backs of pages is totally irrelevant to the grading process. Unless otherwise stated, assume all solutions are aqueous, density = 1.0000 g/mL; activity coefficients are unity ( i.e ., activity = concentration); temperature, T = 298 K; K w = 1.008 x 10 -14 . QUESTION 1 ___________ / 9 Question 7 ___________ /9 QUESTION 2 ___________ /12 Question 8 ___________ /8 QUESTION 3 ___________ / 8 Question 9 ___________ / QUESTION 4 ___________ /19 Question 10 ___________ / QUESTION 5 ___________ /35 Question 11 ___________ / QUESTION 6 ___________ /6 TOTAL ___________ /106
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Name __________________________________ 1. (9 Points) Express the results of the following calculations, as obtained from the readout of a hand calculator, to the proper number of significant figures.
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