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Course: CHEM 2000, Fall 2006
School: Lethbridge College
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Problems Practice on Required Mathematical Skills This problem set is designed to help you identify areas in which your mathematical skills might be weak. It is not designed to test every last skill you might need in this course. Nevertheless, it will give you an idea of the level of mathematics in required this course. 1. Simplify each of the following expressions as much as possible: (a) log10 10pH (b) log10...

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Problems Practice on Required Mathematical Skills This problem set is designed to help you identify areas in which your mathematical skills might be weak. It is not designed to test every last skill you might need in this course. Nevertheless, it will give you an idea of the level of mathematics in required this course. 1. Simplify each of the following expressions as much as possible: (a) log10 10pH (b) log10 (10x2 ) (c) eln x (d) (x + 1)2 x2 + 1 2. Solve the following equations for x: (a) 13x2 + 2(x 1) = 42 (b) 13.2 = log10 x 2 (c) 13.2 = ex x (d) 4.3 = x+1 2x2 + b (e) a = x+c
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Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2002 Midterm ExaminationSolutions(a) The concentrations in experiments 1 and 2 are in a 3:1 ratio, as are the rates. This istherefore a rst-order reaction with rate law2k CH3 Nv1.The rate constant can be determined from eithe
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2002 Midterm ExaminationName:Student number:Aids allowed: Calculator. No printed materials (e.g. periodic tables, calculator manuals) are allowed.Formulas and data are given on page 7.Instructions: Answer all questions in the sp
Lethbridge College - CHEM - 2000
Chemistry 2000: MO and VB descriptions ofbondingMarc R. RousselMO descriptions of bondingTo describe the bonding in a molecule using MO theory, proceedas follows:Look at the valence AOs and, if available, at the AO energies.Separate the AOs into si
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 assignment indexChemistry 2000, Fall 1996, ThermodynamicsPractice Problem Solutions1. This is a heat balance problem. Since there is no indication to the contrary, we must assume thatno heat is either gained or lost by t
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 assignment indexChemistry 2000, Fall 1996, ThermodynamicsPractice Problems1. A 10kg piece of wood (specific heat capacitywater (specific heat capacitywood and water?2. Oxygen boils at) at) atis thrown into 100kg of
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 assignment indexChemistry 2000 Practice Problems onElectrochemistrySome of these problems may require data from the textbook or other sources for their solution.1. Dissolved carbon dioxide reacts with calcium metal in a
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 assignment indexSolutions to the Practice Problem onElectrochemistry1. (The steps are numbered sequentially so the numbers don't correspond directly to those from theprocedure taught in class.)1.2.3.2. The half-react
Lethbridge College - CHEM - 2000
Next: Useful data Up: Back to the Chemistry 2000 test indexChemistry 2000, Fall 96, Test 11. Suppose that a chemist measures the initial rate of disappearance of a reactant A as a function ofconcentration for the reaction:What is the experimental rat
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2001 Section B Test 1Name:Student number:Aids allowed: Calculator. In particular, periodic tables and other written or printed materials areexcluded.Instructions: Answer all questions in the spaces provided. Use the backs of the
Lethbridge College - CHEM - 2000
Next: Useful information Up: Back to the Chemistry 2000 test indexChemistry 2000, Section ASpring 1996 Test 1All questions are equally weighted. Bonus mark policy: Bonuses are applied to this test and to the lastassignment, to a cumulative maximum of
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2006 Test 1Name:Student number:Time: 50 minutesAids allowed: CalculatorInstructions: Answer all questions in the spaces provided. You can use the backs of pagesfor scratch work or for extra answer space. If you do need to conti
Lethbridge College - CHEM - 2000
Test 112111098765432100-9.9%10-19.9%20-29.9%30-39.9%40-49.9%50-59.9%60-69.9%70-79.9%80-89.9%N = 761 quartile: 12/45 = 27%Median: 20/45 = 44%rd3 quartile: 28.5/45 = 63%st1003rd quartilemedian1st quartilePercentage806040
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Section ASpring 1996 Test 1 Solutions1. Using the first two lines of the table, we see that the rate goes up by a factor of 5 when [A] goesup by a factor of 5. Using the last two lines, we see t
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2001 Section B Test 1 Solutions(a) We rst compare experiments 1 and 2. At constant O2 , the concentration of NO isdoubled, resulting in a (roughly) fourfold increase in the rate. Thus, the order withrespect to [NO] is 2. Experimen
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Fall 96, Test 1 Solutions1. From the last two lines of the table, we see that increasing [B] has no effect on the rate. Therefore,the reaction is zero-order with respect to B so we can ignore thi
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2006 Test 1 SolutionsMarginal notes indicate problems assigned during the term which draw on similarthemes.1.(a) [S2 O2 ] doubles from experiment 1 to experiment 2 while [I ] is held Chapter 15 #118constant, causing the rate to
Lethbridge College - CHEM - 2000
Next: Useful information Up: Back to the Chemistry 2000 test indexChemistry 2000, Section ASpring 1996 Test 2This exam will be marked out of 100. The detailed breakdown for each question is given in each question.The bonus questions are worth one mark
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2001 Section B Test 2Aids allowed: Calculator. In particular, periodic tables and other written or printed materials areexcluded.Useful data is given at the end of this paper.Answer all questions in the booklet provided.1. Here
Lethbridge College - CHEM - 2000
Next: Useful data Up: Back to the Chemistry 2000 test indexChemistry 2000, Fall 96, Test 2There are six questions.1. Starch is a glucose polymer, i.e. a very large molecule made by stringing many glucose moleculestogether. The osmotic pressure of a st
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2006 Test 2Time: 50 minutesTotal marks: 49Aids allowed: CalculatorInstructions: Answer all questions in the booklets provided. You can answer the questions in anyorder, but make sure that your answers are clearly marked with the
Lethbridge College - CHEM - 2000
Mark distributions for tests 1 and 218test 1test 216Percentage of class141210864Test 1:1st quartile:Median:3rd quartile:30%46%65%90-100%80-89.9%70-79.9%60-69.9%50-59.9%40-49.9%30-39.9%20-29.9%10-19.9%00-9.9%2Test 2:1st quar
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Section ASpring 1996 Test 2 Solutions1. It sublimes.2. On the solid/liquid phase boundary, K=1. (Solid and liquid are in equilibrium and since theactivities of pure solids and liquids are both
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2001 Section B Test 2 Solutions1.(a) The liquid can only exist above the triple point. The triple point pressure is (from thegraph) approximately 0.37 atm.(b) The normal boiling point is the equilibrium temperature at 1 atm. Agai
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Fall 96, Test 2 Solutions1. If the osmotic pressure is rising, then the total concentration of solutes must be increasing. Thissuggests that the starch is breaking down into its constituent units
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2006 Test 2 Solutions1. At the equivalence point, the base has been completely reacted, producinga solution of its conjugate acid. The solution will therefore be acidic, i.e. itwill have a pH below 7.Bonus:HCN:HHHHNote th
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Section ASpring 1996 Test 3All questions are equally weighted.1. Lactic acid is a monoprotic acid with aof 3.86 and a molar mass of 74.079g/mol. What is thepH of a solution made by dissolving
Lethbridge College - CHEM - 2000
Next: Useful data Up: Back to the Chemistry 2000 test indexChemistry 2000, Fall 96, Test 3Answer any five questions.1. The solubility product of nickel (II) sulfide (NiS) atisand its molar mass is90.76g/mol. What is the solubility of nickel sulfide
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Section ASpring 1996 Test 3 Solutions1. Denote the acid by HA.is the equilibrium constant for the dissociationlittle of the lactic acid will dissociate so that. Sinceis small, very. Also, on
Lethbridge College - CHEM - 2000
Up: Back to the Chemistry 2000 test indexChemistry 2000, Fall 96, Test 3 Solutions1. The equilibrium isThe activities of the nickel and sulfide ions are related by. Therefore2. The equilibrium isThus we have . However, by stoichiometry, . We can fin
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2006 problems:Elementary vs complex reactionsClassify each of the following reactions as possibly, probably not, or certainlynot elementary and explain the basis for your decision.++1. H2 O2(aq) + 2Fe2aq) + 2H+ ) 2H2 O(l) + 2Fe
Lethbridge College - CHEM - 2000
Chemistry 2000 Spring 2006Solutions to the problems on elementary vscomplex reactions1. Certainly not elementary: too many reactants2. Possibly elementary: The reaction is simple (just one bond made and onebroken) and could occur in one step.3. Cert
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 test indexChemistry 2710 Spring 2000 Final ExaminationName:Aids allowed: calculator, onesheet of notesIf you have a graphing calculator, you can use it rather than hand drawing graphs. If you do use yourcalculator's gr
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 assignment indexChemistry 2710 Review Problems1. A kineticist is studying a proton-generating reactionSolutions of A and B are rapidly mixed and the.is measured as a function of time until it haschanged by several tent
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 assignment indexChemistry 2710 Review Problem for the March3-5 LecturesWe have been studying the reactionSuppose that the rate constants can be estimated from experimental data (they can, from experiments tobe discussed
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 assignment indexChemistry 2710 Review Problem for the March3-5 Lectures: SolutionThe rate constantsandare much larger than. The intermediate B should therefore be removedrapidly, which means that the steady-state appr
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 quiz indexChemistry 2710 Spring 2000 Quiz 1Name:For the reaction, the following data was obtained in a solution in which the initialconcentration of A was 0.8mol/L:What is the initial rate of the reaction? Explain (bri
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 quiz indexChemistry 2710 Spring 2000 Quiz 2Name:Consider the following initial rate data for the complex reaction:In this table, c is the concentration of a species which does not appear in the overall reaction but affe
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 quiz indexChemistry 2710 Spring 2000 Quiz 3Name:Indium (I) chloride dissolves quickly in dilute acid. The following reaction then occurs:The reaction is known to obey a first-order rate law. The concentration of indium (
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 quiz indexChemistry 2710 Spring 2000 Quiz 4Name:Suppose that the reactionhas a rate lawwithat 320K. The reaction is carried out in a glass bulb of fixed volume at320K. If the initial pressures of A and B are, respecti
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 quiz indexChemistry 2710 Spring 2000 Quiz 5 solutionStart by taking a logarithm of both sides of the half-life equation:If we plotvs, we should get a straight line of slope 1-n. We can useconcentration.The slope is -1
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 test indexChemistry 2710 Spring 2000 Test 1Name:Aids allowed: calculator, onesheet of notesPlease write your answers in ink. If you have a graphing calculator, you can use it rather than handdrawing graphs. If you do u
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 test indexChemistry 2710 Spring 2000 Test 1Name:Aids allowed: calculator, onesheet of notesPlease write your answers in ink. If you have a graphing calculator, you can use it rather than handdrawing graphs. If you do u
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 test indexChemistry 2710 Spring 2000 Test 1 Solutions1. If we look at the first two experiments, we see that the rate doubles when the ozoneconcentration doubles. Comparing the first and third experiments, the rate triple
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 test indexChemistry 2710 Spring 2000 Test 2Name:Aids allowed: calculator, onesheet of notesPlease write your answers in ink. If you have a graphing calculator, you can use it rather than handdrawing graphs. If you do u
Lethbridge College - CHEM - 2710
Up: Back to the Chemistry 2710 test indexChemistry 2710 Spring 2000 Test 2 Solutions1. Let. ThenThe graph has the following appearance:From the slope and intercept, we findand. Since, we have2. The Haldane relationship allows us to calculate the
Lethbridge College - CHEM - 2740
Chemistry 2740Physical ChemistrySpring 2011Instructor:Oce:Phone:Email:Course web site:Marc R. RousselE862403-329-2326roussel@uleth.cahttp:/people.uleth.ca/roussel/C2740On most campuses the course in physical chemistry has a reputation for dic
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2009 Final ExaminationTime: 3 hoursMarks: 105Aids allowed: calculator, 8.5 11-inch formula sheetInstructions: You can answer the questions in any order, but make sure that you clearlylabel each of your answers with the section a
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2010 Final ExaminationTime: 3 hoursMarks: 105Aids allowed: calculator, 8.5 11-inch formula sheetUseful data is given on the back page of this exam.Instructions: Answer all questions in section 1. In sections 2 and 3, answer only
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2011 Final ExaminationTime: 3 hoursMarks: 100Aids allowed: calculator, 8.5 11-inch formula sheetLeaving the room: You may not leave during the rst half-hour of the exam, nor during the last 15 minutes. When you are nished, return
Lethbridge College - CHEM - 2740
Chemistry 2740 tests and solutions Spring 2011 Test 1, solutions and grade statistics Test 2, solutions and grade statistics Test 3, solutions and grade statistics Final examination Spring 2010 Test 1, solutions and grade statistics Test 2, soluti
Lethbridge College - CHEM - 2740
Test-taking strategiesMarc R. RousselDepartment of Chemistry and BiochemistryUniversity of LethbridgeJanuary 25, 2011Taking tests is not a natural thing for most of us. Its something we learn to do. This notesuggests some strategies that should help
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2010 Test 1Time: 50 minutesMarks: 41Aids allowed: calculator, 8.5 11-inch formula sheetUseful data is given on the reverse of this page.Instructions: You can answer the questions in any order, but make sure that you clearlylabe
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2011 Test 1Time: 50 minutesMarks: 36Aids allowed: calculator, 8.5 11-inch formula sheetUseful data is given on the reverse of this page.Instructions: You can answer the questions in any order, but make sure that you clearlylabe
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2010 Test 1 ResultsMinimum:1st quartile:Median:3rd quartile:Maximum:10/4119/4121/4128/4135/4124%46%51%68%85%
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2011 Test 176543210Low:1st quartile:Median:3rd quartile:High:4/3613.51824.2534(11%)(38%)(50%)(67%)(94%)
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2010 Test 1 Solutions1. (a) Suppose that we have one reaction that, by itself, is not thermodynamically allowed. If we add a second reaction that removes one of the products of the rst,and if the overall free energy change for the
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2011 Test 1 Solutions1. Intensive: temperature, pressureExtensive: mass, number of moles, volume, internal energy, enthalpy, entropy2. (a) mass of sample and temperature change(b) to obtain the calorimeters heat capacity(c) the
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2010 Test 2Time: 50 minutesMarks: 31Aids allowed: calculator, 8.5 11-inch formula sheetUseful data is given on the reverse of this page.Instructions: You can answer the questions in any order, but make sure that you clearlylabe
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2011 Test 2Time: 50 minutesMarks: 32Aids allowed: calculator, 8.5 11-inch formula sheetUseful data:R = 8.314 472 J K1 mol1To convert degrees Celsius to Kelvin, add 273.15.Instructions: You can answer the questions in any order
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2010 Test 2 resultsTest 26543210Minimum:1st quartile:Median:3rd quartile:Maximum:8.5/3117.7521.525.2530(27%)(57%)(69%)(81%)(97%)
Lethbridge College - CHEM - 2740
Chemistry 2740 Spring 2011 Test 2 6 5 4 3 2 1 0 Minimum: 11/32 (34%) 1st quartile: 18.75 (59%) Median: (70%) 22.25 3rd quartile: 26 (81%) Maximum: (100%) 32