Chem5 Exam1 F05

Chem5 Exam1 F05 - Chem 5 Exam#1 Fall 2005 Name General instructions 1 Don't panic Write down what you know and what you need to figure out Think

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Chem 5 Exam #1 Fall 2005 Name_______________________________ General instructions: 1. Don’t panic! Write down what you know and what you need to figure out. Think about all relevant equalities. Make sure to keep track of units. Check your answer and see if it makes sense! Some questions are easier than others, so make sure you look all the questions over. 2. Remember the honor system. No notes, books, stored information in calculators, or external help is allowed. 3. Use the space provided for answers. The back of pages can be used as scrap paper. Show work for partial credit! Write legibly! 4. There are 120 total points on this exam. Questions are numbered and parts of questions are lettered. Numbers in parentheses indicate the point value of the question. If you can not get an answer to a prior part of a question, make up a number and carry on with it. You will not be penalized twice for an incorrect answer. 5. Use significant figures where appropriate. 6. This exam has 16 pages. If you are missing a page, now would be a good time to tell me about it. Some useful information (plus see the periodic table at the end): 0 K = -273.2 ºC = absolute zero a ac b b x 2 4 2 ± = 1 atm = 760 torr (mm Hg) ºC = (ºF – 32) / 1.8 Avogadro’s number N 6.02214 x 10 23 mol -1 Gas constant R 0.08206 L atm K -1 mol -1 Some strong acids: HCl HNO 3 H 2 SO 4 Some weak acids: HF CH 3 COOH Page 1 of 16
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This page is for grading purposes. (please do not fill it out yourself) Question Points 1 (10) 2 (10) 3 (5) 4 (5) 5 (5) 6 (10) 7 (10) 8 (4) 9 (4) 10 (12) 11 (10) 12 (10) 13 (10) 14 (10) 15 (5) Total (120 total) Page 2 of 16
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1. (10 points) You need to identify a 500.00 ml solution of an unknown strong acid that you found (unlabeled) in the Chem5 lab. To begin, you prepare a standard solution of NaOH by dissolving 32.00 g of NaOH in water and bringing the total volume up to 1.00 liter. You titrate the unknown acid solution until the acid is completely neutralized. This uses 312.50 ml of the
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This note was uploaded on 05/30/2008 for the course CHEM 5/6 taught by Professor Gribble during the Winter '08 term at Dartmouth.

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Chem5 Exam1 F05 - Chem 5 Exam#1 Fall 2005 Name General instructions 1 Don't panic Write down what you know and what you need to figure out Think

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