110_Fa11_LUZ-week13ST (1) - Week 13: Lectures 37 39 Lecture...

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Jensen Chem 110 Chap 5 Page: 1 Week 13: Lectures 37 – 39 Lecture 37: W 11/16 Lecture 38: F 11/18 Lecture 39: M 11/28 Reading: BLB Ch 4.6; 10.5; 8.8; 5.3 – 5.7 Homework: BLB 10: 57; 5: 4, 17, 29, 37, 39, 53, 55, 83, 85; 8: 65a, 67ac, 72ab, 74, 92a; Supp Rxns: 12 – 18; 8: 12 – 14; 5: 1 – 7 Reminder: Angel Quiz 12 on Thur 11/17 ALEKS Objective 13 due on Tues 11/29 Jensen Office Hour: 501 Chemistry Building Tuesdays and Thursdays 10:30 – 11:30 am Thanksgiving break: Nov 21 – 25 Final Exam: Monday Dec 12 2:30 – 4:20 pm 40 questions. A 100% Score earns 58 points out of 200 course points (29% of final grade). Did you miss an exam? Download a Makeup Request Form from Angel -> Exam Schedule
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Jensen Chem 110 Chap 5 Page: 2 Solution Reactions Basic skills: How to calculate formula weight (molar mass) How to do the following conversions: gram mole concentrations mole Titration: find concentration of unknown solution Can be used with: Acid-Base reactions (neutralization) Precipitation reactions Redox reactions Method: React solution of unknown concentration with solution of known concentration ( standard solution ) At the end point or equivalence point (using an indicator ), the reaction is stoichiometrically complete At the end point, you know the exact moles of each reactant in solution from the balanced equation. ±²³´µ²¶³´·¸¹µº·» ¼½¶¾¶¿³À¶ÁÀ³Â³Ã±ÄÅÆ ´·¸¹µº·»³·Ç³¹»È»·É» Ê·»Ê½»µË±µº·» ¼½¶¾¶¿³Ì³Â³Å͸Æ
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Jensen Chem 110 Chap 5 Page: 3 Example: How many mL of a 0.827 M KOH solution is required for neutralization of a 35.00 mL sample of 0.737 M H 2 SO 4 solution? A. 35.0 mL B. 1.12 mL C. 25.8 mL D. 62.4 mL E. 39.3 mL
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Jensen Chem 110 Chap 5 Page: 4 Practice Example: One common component of antacids is Mg(OH) 2 . If an upset stomach contains 125 mL of 0.115 M HCl, how many grams of Mg(OH) 2 is required to completely neutralize the acid? A. 0.144 g B. 0.286 g C. 0.419 g D. 0.525 g E. 0.884 g
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Jensen Chem 110 Chap 5 Page: 5 Gas Phase Reactions When chemical reactions involve gases , the balanced equation provides the number of moles of reactants and products . The ideal gas equation provides the link between number of moles and P, V, T of gases . Example: Air Bag How many liters of N 2 at 735 mm Hg and 26°C are produced from 126 g NaN 3 (sodium azide)? 2 NaN 3 (s) 2 Na(s) + 3 N 2 (g)
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Jensen Chem 110 Chap 5 Page: 6 Practice Example: Humans consume glucose to produce energy, and the products are CO 2 and H 2 O. C 6 H 12 O 6 (s) + O 2 (g) CO 2 (g) + H 2 O(l) [unbalanced] What volume of CO 2 is produced during the consumption of 4.65 g glucose at body temperature (37 ºC) and 1 atm? A. 3.94 L B. 1.97 L C. 0.657 L D. 3.47 L E. 7.88 L
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Chem 110 Chap 5 Page: 7 Thermochemistry K INETIC E NERGY P OTENTIAL E NERGY Mechanical moving mass mass in a place 1/2mv 2 where force can act Electrical moving charge electrostatic: Q 1 Q 2 / d Light photons Chemical bonds Sound molecules moving uniformly Nuclear binding energy Heat molecules moving randomly Gravitational
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This note was uploaded on 01/18/2012 for the course CHEM 110 taught by Professor Hofmann,brucerob during the Fall '08 term at Pennsylvania State University, University Park.

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110_Fa11_LUZ-week13ST (1) - Week 13: Lectures 37 39 Lecture...

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