The final exam starts at 10AM on Saturday 5/21. Take as much time as you need to complete the exam.
The final exam will be very much like the practice final exam.
Regarding Chapter 11 (Nuclear Chem), there will be a single question on the final regarding alpha particles. I will provide you with the definition of the alpha particle.
***Be sure to study from the practice final exam, get some sleep, and eat breakfast before the final on Saturday morning.***
Exam 3 takes place during the first lecture today, starting at 10:00AM. It covers materials in the textbook chapters 7-10.
Lab this week will be check-out. You will take inventory and clean out your glassware and lab drawer.
You can review the information for Chapter 11 (Nuclear Chemistry) below. Complete the textbook problems assigned therein. You can skip the half life calculations.
Homework #12 – Nuclear Chemistry Handout (Chapter 11)
Lecture this week will cover Chapter 10: Acids and Bases. Will will cover the below slides (32 slides total) in class on Saturday, and also work out some titration calculations on the white board.
Chapter 10 slides (Acids and Bases)
Lab this week is Experiment #25: Titration of Vinegar. You will prepare your own data sheet to record measurements and perform calculations. See the second page of the second posted file for lab. With your submission, include answers to the 3 quantitative questions at the end of the lab manual. They will be graded for accuracy.
Exp #25 more information and EXAMPLE data sheet
Homework #11 covers the problems of interest from Chapter 10 in the McMurry textbook.
A practice third exam is posted below. We can review on the afternoon of 5/7. Exam 3 takes place on Saturday 5/14 at 10:00AM.
A practice final exam is posted below. The final exam takes place on Saturday 5/21 at 10:00AM. We will review on the afternoon of 5/7.
Practice Final Exam (solutions)
Lecture this week will cover Chapter 9: Solutions. We will cover most of the slides (28 total) over the two lectures on Saturday. Lectures will emphasize the concepts, and there will be some calculations to work out in Homework #10. The molarity (M = moles/Liters or mol/L) formula especially is an important intermediate step used next week covering Chapter 10 (Acids/Bases) and the Titration experiment. Keep in mind that understanding titration, which involves the concepts and the molarity formula from Chapter 9, is one of the main learning outcomes for Chem30A participants.
Lab this week is Experiment #24: Finding pH of Solutions. Print and complete the report sheet in lab, and submit the completed sheet with answers to the 3 questions at the end of the lab manual.
Exp #24 color figures (1 page)
Homework #10 covers the problems of interest from Chapter 9 of the Mcmurry textbook.
Lecture this week will cover Chapter 8: Solids, Liquids, Gasses. The textbook publisher has provided a set of 74 slides for this chapter. We will look at SOME of them in class. There are many slides with examples and extra information you may review at home. If you do print these for class, try printing as “handouts” with several slides reduced to fit on each page.
Lab this week is Experiment #12: Waters of Hydration. There is an EXAMPLE report sheet posted. You will need to draw your own data table on a blank page of paper this week. Turn in your completed data table and answers for the 3 questions in the manual next week.
Exp #12 report sheet – EXAMPLE
Do both parts of the homework, and staple/bind them into a single submission. You can check your answers and work for the first part.
Note that for two nonpolar molecules, the one with the larger surface area has more charge imbalance, stronger London/van der Waals forces, and thus higher b.p.
Homework #9 (part 1) Gas Laws (with answers)
Homework #9 (part 1) Gas Laws (worked solutions)
Homework #9 (part2) IMFs and Heat
Homework #9 (part 2) IMFs and Heat (solutions)
Exam 2, lab reports, and homeworks have been graded. Please pick up your materials in class. Everything you have submitted so far (as of our 4/9 meeting) has been graded. Exam #2 solutions are posted with the 4/9 materials.
I’ll also have a semester grade check ready… we are 299 of 700 points deep into the semester… almost half way pointwise… with 6 more class meetings remaining, including Exam #3 on 5/14 and the Final Exam on 5/21.
Lecture this week will cover Chapter 7. Please read ahead. There may be many new concepts such as energy, heat, specific heat, endothermic, exothermic, Gibbs Free Energy, chemical equilibrium (Le Chatlier principle), rate of reaction, and catalyst. We will cover mostly calculations with these quantities. Some level of familiarity with these terms, as obtained by reading your textbook, will enhance your classroom learning.
Lab this week is Exp #7: Specific Heat of a Metal. Enter your data into the report sheet, perform your calculations on the report sheet (with equations, math, and units), and answer the questions at the ends of both the report sheet (2 quantitative problems) and the lab manual (2 qualitative questions). You can answer the qualitative questions from the lab manual on the back of a report sheet page.
Homework #8 covers Chapter 7 (Thermodynamics etc.) It is due at the beginning of class on 4/23.
The first lecture on 4/9 will be an open discussion period to cover the practice exam and other any questions relevant to Exam #2. Solutions for both the practice exam and the homework have been added to last week’s post. Please check your answers, and use these materials to study for Exam #2 on 4/9 afternoon.
Lab this week will be Experiment #9: Double displacement reactions. Some of the chemicals may stain your clothing.
Exp #9 manual – Double displacement reactions
Exam 2 will take place during the second lecture on 4/9. It will cover all material since the first exam (corresponding to chapters 4-6 in the textbook), as well as some basic ionic compounds nomenclature (from chapter 3 in the textbook, and covered on the last page of the last exam). You will need to be able to distinguish between ionic and covalent compounds for the nomenclature section on the second exam. There will not be any Roman numerals in the ionic naming questions.
Quiz #2 (precipitation reactions) solutions
We will complete Chapter 6 (Stoichiometry) this week. We will mostly be covering examples on the white board. (There are not any slides.) Bring your calculator and a periodic table to follow along, and plan to take notes.
Lab this week will be Experiment #11: Magnesium oxide. Be sure to wear proper clothing, as we will be heating crucibles to very high temperatures with the Bunsen burners. Print the manual below for lab, as well as the report sheet. The calculations described in the manual will be performed on the report sheet. Answer the 3 questions in the lab manual either on the back of the report sheet, or on an attached page. Please use the equations for lines 4, 5, and 6 in the CORRECTED report sheet below. There are some errors in the equations in the old sheet (still posted). You can submit either report sheet, just please use the correct calculations from the CORRECTED version posted 4/2 on the evening after the experiment.
Exp #11 manual – empirical formula of magnesium oxide
Exp #11 report sheet – WITH ERRORS
Exp #11 report sheet (CORRECTED)
Homework #7 covers the stoichiometry calculations discussed in lecture today. It is due at the beginning of lecture 4/9.
A practice exam is provided to study for Exam 2 scheduled for 4/9. Solutions will be posted here. The practice exam is neither collected nor graded. We will review practice exam solutions during the first lecture on 4/9. Exam #2 will take place during the afternoon lecture period on 4/9.
Practice Exam #2 – some answers for limiting reactant problems
Please email me if you think there are any errors in the practice exam solutions. Your classmates will appreciate it!
There are 13 slides for Chapter 5 (Reactions). Most of the slides will be useful for following the examples in class. There are no handouts this week, because the fonts would be too small upon reduction.
You will want to be familiar with the solubility table for Chapter 5 (Reactions). Print a copy for class, or use the copy in the slides (above). A copy will be provided on exams. There is nothing to memorize here.
Lab this week will be Experiment #8 (Chemical Changes). The manual and report sheet are posted below.
Exp #8 manual – Chemical changes
Homework #6 is due at the beginning of class on 4/2, after spring break. There will be a short quiz on precipitation reactions on 4/2, related to problem 2 from Homework #6.
Homework #6 solutions – precipitation reactions (problem 2) only
Homework #6 solutions (complete)
We will finish Chapter 4 (covalent bonding) today. Please read ahead. There are not any slides. We will be working mostly from examples on the whiteboard and the lab worksheet (below). You may wish to look at or print Table 4.2 on page 115 (Molecular Geometry Around Atoms with 2, 3, and 4 Charge Clouds).
There is not any wet lab (experiment) today. We will complete a worksheet on Lewis structures and VSEPR/geometry. Bring a printout to class.
VSEPR worksheet (lab) solutions
Homework #5 (covalent bonding, Lewis structures, VSEPR, polarity, and nomenclature) will be due at the beginning of our next class meeting on 3/19.
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