Chemistry
1450
Patrick Desrochers
Fall 2006 Lecture: (Laney 102) MWF 8:00 -
8:50 am Lab (Laney 206): Th
10:50 - 1:30 or 2:40 - 5:30 pm
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(.pdf format, download Adobe Reader for free to read pdf files)
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Recent Chem 1450 exams in .pdf format Fall 2006 Final Exam Review List |
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answers (as pdf) |
These exams are best used as practice exams. After studying for the exam, allow 50 min (2 h for the Final) and work the exam using only a pencil/pen, calculator, and a periodic table. You may check your answers with me after you have completed the practice exam. This service only works if you plan ahead, several days prior to your actual exam.
Assignments
Clear due dates for each of the following will be announced in class.
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Assignment Topic/Title (click on the title to access the assignment) |
Due Date |
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Wed Aug 30 |
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Thu Aug 31 |
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Wed Nov 14 |
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Chime Molecular Modeling (still under construction) |
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The following are links to my own and other Chem 1450 resources.
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pocket
water purification Proctor & Gamble product for impoverished
regions |
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Dental
filling chemistry Nicholson, J. W.; Anstice, H. M. J. Chem. Educ. 1999
76 1497. |
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paramagnetism
of liquid oxygen (animated movie of Fig. 7.17 p 281) |
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two different interactive periodic table
links |
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Ammonia synthesis
videogame G.
Weaver, |
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Bio Town, USA ( |
Laboratory Handout Downloads and Prelab Advice
Downloads are in .pdf format and are readable using
Adobe Reader. This standard plugin is free over the internet.
You should print and read these well in advance of the scheduled lab
activity.
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Experiment |
Prelab Advice, downloads available Q refers to specific prelab questions. |
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PROP 474 |
The attached penny density exercise is required, and will be completed during the lab period, in addition to the published procedure for PROP 474. |
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PROP 603 |
Q2. If you define each, be certain to also emphasize how the terms are different in each pair. |
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ANAL 517 |
Q3. For example, how are CuSO4(aq) and CuSO4 . 5H2O(s) different? Which of these is a mixture, which is a pure compound? |
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ANAL 900 |
Q2. Describe and give a reaction to make your point. There are many obvious ones in your text. Q5(c). Theoretical mass percent driven off assumes the amounts written in the balanced chemical reaction. CO2 is part of MgCO3. One mole of MgCO3 would yield how many moles of CO2? This mass loss is a percent of the original MgCO3. Q6(d). The only way I can see to get this from the information given is to subtract the % MgCO3 from 100%. |
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Stoichiometry Practice |
The stoichiometry practice worksheet is posted here. Solutions to this worksheet posted here. Q1. as much of this as you can; Q2. Write the balanced equation required. Anhydrous lead nitrate is just lead nitrate (where its lack of water is emphasized; Q3. balance the reaction, determine the limiting reactant; Q5. the moles of B needed for the BxHy formula must be obtained from the mass of the original sample; Q6. only the CaSO4 in the solid undergoes a change with heating, SO3 released came from CaSO4 in the same way that CO2 came from MgCO3 in the dolomite lab; Q7. the formula of methanol can be found in your text. |
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ANAL 424 |
Q2(2). One is the more accurate quantitative point. The other is a visual point that tells you when to stop the titration. Clearly indicate which is which. Read Sec. 3.10 in the text. Everywhere it calls for equivalents, you should calculate moles. Everywhere it calls for normality, you should calculate molarity. |
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STRC 345 |
Q1. Read Sec. A.3 (App. A) in the text for advice on graphing. Q4. Graphs may be done by hand or electronically using Microsoft Excel or similar spreadsheet software. |
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STRC 409 |
1st day Q1. See the
linked example for KNO3.
Q3. We will discuss formal charge in lab. Save this one until then, but carefully
read Sec. 7.8 to prepare for it. Q4.
Second question is asking based on resonance... Q5. We will discuss VSEPR in lab. Save this
one until then, but carefully read Sec. 7.9 to prepare for it. 2nd day Attached is
an
example of what is expected for the VSEPR, valence bond, and
geometry/bonding descriptions asked for in this lab exercise. |
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THER 901 |
Print or neatly copy the linked table for use in Thu's lab THER901. We will use this table in lab. Work the sections shaded in blue before you come to lab. Watch for the 2H+ that can come from H2SO4. Q3. DHneuto is DHo as we have been discussing throughout Ch 8. The "neut" subscript means this is the enthalpy change of a neutralization reaction, the one that is written. Q4(a) We are assuming that the 50 mL HCl(aq) + 50 mL NaOH(aq) makes 100 mL of solution and that this is about 100 g of solution. Use this in your q calculation. Q4(b) This is simply the idea that |qreaction| = |qwater|. One is formally the negative of the other. Q4(d). This is a mole ratio idea. If qreaction is released when _____ moles of water are made, how much heat would be released when 1 mole of water is made? Q5. For these just determine which reagent is limiting in each case. Lab itself will answer these questions. |
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ANAL 378 |
Prelab hints: 2.(5) requires no calculation . The volume is 43.35 mL as stated in the problem. We will be using a much simpler, but just as accurate, experimental setup in place of the one shown in Figure 1. See the attached figure and familiarize yourself with this modified setup. |
