### CH102 General Chemistry, Spring 2019

###### Updated Tuesday, May 7, 2019 4:03:09 PM

The Final Exam is Wednesday, May 8, 6–8pm. It will not be given at any other time and failure to take the exam will result in a score of 0 for the exam, so please make end-of-semester plans accordingly.

Welcome to CH102 General Chemistry. This is the second semester of a year-long course intended primarily for science majors, pre-medical students, engineering students who require a one-year course, and other interested students. This syllabus is designed to answer many questions you may have. Please read it over and then keep it handy to use throughout the semester. If you have questions about the material or the course, we encourage you to use the course online discussion forum. Everyone in the course follows this forum and so this is the fastest way to get your questions answered.

### Staff

The course is given by

Senior Lecturer Alexander Golger (SCI/270C, 617-353-2124, golger@bu.edu) is the course coordinator and is in charge of the laboratory part of CH101.

Discussion sections are led by Senior Lecturer Natalya Bassina (SCI/270A, 617-353-4716, nbassina@bu.edu), with help from graduate teaching fellows Melissa Burrows, Manav Kunar, Mary Malloy, Jacob Marasco, and Tanmoy Pal, with help from undergraduate learning assistants. Natalya Bassina also is in charge of class scheduling and other administrative aspects of the course.

### Required course materials

The text for this course is based on an abridged, custom, online edition of the Canadian text Mahaffy et al., Chemistry: Human Activity, Chemical Reactivity, second edition, ISBN 9781305284203. We have arranged for the online edition to be purchased online directly from the publisher and includes the online version of the text only and access to online activities. The online course key is E-26E6YKUGF8RSM. To purchase, go to

Should you also want a printed copy of the current, second edition text, you may purchase a used copy available at various places.

In addition to the text above, the following seven items are required:

1. ALEKS General Chemistry online personal tutoring. The cost is $75 and is to be purchased online as described here. 2. The Turning Technologies ResponseCard RF Clicker (ISBN 978-1-934931-68-4). You must use only your own clicker.Using a clicker belonging to someone else will constitute academic misconduct. 3. Golger, General Chemistry CH102 Laboratory Manual, (Hayden McNeil Publishing, 2019, ISBN 978-1-5339-1079-0). 4. Laboratory notebook, Hayden McNeil Publishing; the 50-page version should be sufficient. 5. Approved safety goggles, item #9301, also required in organic chemistry. 6. Laboratory coat, also required in organic chemistry. 7. A lock to secure your belongings in the locker when in the laboratory 8. Finally, you are required to use the Texas Instruments TI-30X IIS 2-Line Scientific Calculator for this course, available from Amazon.com for about$11 and elsewhere. This is the only calculator that we will allow you to use to do discussion quizzes and course exams. Using a different calculator on exams or quizzes will constitute academic misconduct.

Be aware that it is a Massachusetts State Law that safety goggles are mandatory in the laboratory. In the lab, all students who wear contact lenses should wear prescription glasses under their safety goggles. Contact lenses are forbidden in the lab. Also, all students must wear the appropriate clothing: long pants, long sleeves and closed shoes (no sandals or flip-flops).

#### Using the Mahaffy et al., 2e, eBook

Your Mahaffy et al., eBook subscription includes detailed help on all of the end-of-chapter questions. To access this help, and all of the other eResources in each chapter, do the following.

3. Click any chapter you are interested in, to display its detailed contents.
4. Select the part of the chapter you are interested in to access all of its eResources.

We hope this will be helpful to you.

### Course schedule

• First lectures: January 22 (A4) and 23 (A1, A2, and A3)
• First discussions: January 24 and 25
• First pre-lab lecture: Week of January 28
• First lab: Week of February 4

The course consists of five required components:

• lecture,
• discussion,
• pre-lab lecture,
• lab (CH104 does not have a lab component), and
• exams, Mondays 6:30–8:15pm. Note: The 6:30–8:15pm Monday time is a required meeting time, but it will be used only for exams.

There are two and a half hours of lecture meetings each week, and these lecture meetings are held in SCI/109 and SCI/113 at alternative times:

You are required to attend your assigned lecture meeting.

There is a 50 minute discussion each week, on Thursday or Friday. Discussions meet starting Thursday, January 24.

There is one two hour and fifty minute laboratory each week. There will also be a laboratory lecture:

• Tuesday 12:30–1:20pm in SCI/109
• Wednesday 3:35–4:25pm in MOR/101

Pre-Lab lectures begin the second week of the semester. The first laboratory lecture is the week of January 28. You are required to attend your assigned pre-lab lecture meeting. Labs begin the third week of the semester on Monday, February 4. You are required to attend your assigned lab.

The 6:30–8:15pm sessions are used only for the lecture exams and the lab exam. On lecture exam days there will be no Monday lecture (sections A1, A2, and A3) and the preceding Thursday or following Tuesday evening lecture (section A4) will be shortened to 30 minutes; the section A4 lecture that will be shortened will be announce the week preceding the exam. For the lab exam, Monday lectures will be held as usual.

If you have not yet registered for all of the five components of the course (three for CH104), please do so right away. All grade records are based on the registrar information, so we require that you be officially registered and that you attend the corresponding lecture, discussion and lab.

### Exams and quizzes

There will be three lecture exams, a lab exam and a course final exam as follows:

• Lecture exams: Mondays, February 25, April 1, and April 22; all exams are 6:30–8:15pm in locations to be announced before each exam. Exam durations may be shortened.
• Lecture quizzes: Most lectures, based on material covered in the lecture; if you are absent, missed lecture quizzes count as 0. The lowest scoring lectures are dropped (two for section A4 and three for sections A1, A2, and A3).
• Pre-Lab lecture quizzes: Every lecture, based on your preparation of material to be covered in the lecture and the previously performed CH102 labs. If you are absent, the missed quiz counts as 0.
• Discussion quizzes: These quizzes assess your understanding of topics covered in previous lectures, discussions, and homework. A missed quiz counts as 0. The lowest discussion quiz score will be dropped.
• Lab exam: Monday, April 29, 6:30–8:15pm in locations to be announced beforehand. The exam duration may be shortened.
• Final exam: Wednesday, May 8, 6–8pm. The exam duration may be shortened.

Exams are given only at the scheduled time. A missed exam counts as 0. In particular, please note the following:

• The final exam, Wednesday, May 8, 6–8pm, will not be given at any other time and failure to take the final exam exam will result in a 0 for that exam, so please make end-of-semester travel plans accordingly.

### No electronic devices in classes

We require that no electronic devices (cell phones, computers, tablets, etc.) may be used in lectures, discussions, and labs.

Why?

To help you get the greatest benefit you are able to during these class times.

All students at Boston University are expected to maintain high standards of academic honesty and integrity. It is the responsibility of every student to be aware of the Academic Conduct Code’s contents and to abide by its provisions, as detailed at

Please note carefully that we treat cheating with zero tolerance. The consequences of cheating are at a minimum that the score for work on which cheating occurs counts as 0, and a letter detailing the cheating is sent to the student's advisor, the dean of CAS, and placed in the student's academic file. Possible further consequences are referral to Academic Conduct Committee and additional penalties, including possible expulsion from university.

### Course Web and online discussion

The course Web at

http://quantum.bu.edu/courses/CH102-spring-2019 http://quantum.bu.edu/courses/CH102-spring-2019

and the online discussion forum Piazza are used extensively in this course. Sign up for Piazza at

http://piazza.com/bu/spring2019/CH102spring2019 http://piazza.com/bu/spring2019/CH102spring2019

All posts to Piazza go to everyone in the course and so this is the fastest way to get your questions answered and to help your classmates with their questions.

Finally, should you have personal concerns, please email them to CH102-questions@bu.edu CH102-questions@bu.edu.

http://www.bu.edu/tech/policies/computing-ethics/ http://www.bu.edu/tech/policies/computing-ethics/

Abuse can result in severe sanctions, including fines and academic probation or suspension.

### What we will cover

We have designed the course as an introduction to general chemistry that integrates laboratory explorations with the development of the analytical tools necessary to understand and guide those explorations. Some particular aspects that we will emphasize are

• mathematics as a tool for the exposition and manipulation of chemical concepts
• the connection between microscopic models of matter and its macroscopic properties
• the connections between applications from pure and applied research and from technology to chemistry

Our goal is to help you share in our excitement for and the wonder of science, to challenge you to excel, to give you a sense of empowerment about science, and to encourage you to continue study in science—and hopefully chemistry. We intend to focus especially on what are the core ideas of chemistry.

#### Lecture

In this semester we cover Mahaffy et al., chapters 10 through 18. Detailed lecture summaries will be provide here.

#### Laboratory

The detailed laboratory schedule is here.

The laboratory part of the course will let you see first-hand chemical principles and processes in action. It will also give you experience with some of the methods scientists use to do chemical research. Your laboratory will consist of the following.

1. Gas laws, 1 period lab (Mahaffy et al., pp. 416 - 423): You will establish the relationship between the volume, pressure, temperature and the number of moles of a gas sample. Combining them together, the Ideal Gas Law and the value of the gas constant R will be determined. In one of these experiments, the lowest possible temperature that can be reached in nature, −273.15 oC, will be found!
2. Colligative properties, 1 period lab (Mahaffy et al., pp. 466-474):  In this experiment you will discover how to control the freezing temperature of any liquid.  You will investigate the freezing point depression effect, which lowers the freezing point temperature of a solution when some chemicals are added to the pure liquid.
3. Equilibrium formation of ferric thiocyanate complex, 1 period lab (Mahaffy et al., pp. 491-507; 511-515): What happens in a reaction depends not only on the reactants, but also on the conditions under which they are combined.  This gives us some control over the outcome of chemical reactions. In this experiment, you will investigate the sensitivity of the reaction equilibrium to the ratio of reactants and to the temperature of the reaction mixture.
4. Acid-Base titration, 1 period lab (Mahaffy et al., pp. 532-535; 573-578): How can you tell when a reaction is finished? This question is very important in all areas of chemistry. You will evaluate several titration methods for determining when an acid-base reaction is completed.
5. Solubility properties: The common ion effect, 1 period lab (Mahaffy et al., pp. 595-608): In this experiment, you will explore the nature of solubility equilibria and investigate the solubility of one sparingly soluble salt in different solvents. This lab will be an open project experiment, so we hope you will enjoy your research work.
6. Electrochemistry: Electrochemical cells, 2 period lab (Mahaffy et al., pp. 624-649; 686-696): You will study some practical applications of electron transfer reactions by constructing various voltaic cells and investigating different approaches for reaching the highest possible cell voltage.  The second part of this experiment is an open project, which gives you a chance to apply your lab experience gained in the course of General Chemistry.
7. Kinetics: Iodine Clock Reaction, 1 period lab (Mahaffy et al., pp. 721-750): You will explore how fast chemical reactions proceed, what factors influence the reaction rate, and by what molecular mechanism a reaction occurs.

Your scores for each part of the course will always be available in your Blackboard Grade Book.

We do not assign letter grades to exams, labs, or quizzes. We only assign a course grade. This course grade will be determined based on your overall course score. This score is determined as follows:

Contributions to overall course score
CH102 CH104
Lecture exams 30% 37.50%
Final exam 15% 18.75%
Laboratory 20%
Lecture quizzes 10% 12.50%
Discussion quizzes 15% 18.75%
ALEKS mastery 10% 12.50%

For CH102 students, the lab score counts for 20% of your course grade. The various components of the lab will be graded as follows: The lab experiments (30 points for each lab period), lab quizzes (10 points each), pre-lab lecture quizzes (5 points each), and the lab exam (60 points). Lab quizzes are given at the beginning of each lab to check your familiarity with the basic features of the lab to be done.

CH104 (lecture-only) students will be graded based on their relative score for the lecture-only part of the course: Lecture exams count as 30/80 * 100% = 37.50%, the final exam as 15/80 * 100% = 18.75%, lecture quizzes as 10/80 * 100% = 12.50%, discussion quizzes as 15/80 * 100% = 18.75%, and ALEKS as 10/80 * 100% = 12.50%.

Lecture quizzes: Your score is the percent of lectures given so far in which you have gotten the correct answer. For example, if in lecture 1 there were three quiz questions, and you got two of them correct, your score for that lecture would be 66.6%. Then, if in lecture 2 you got all quiz questions correct, your score for that lecture would be 100%. Finally, your score taking into account both lectures would be (66.6% + 100.%)/2 = 83.3%. The lowest scoring lectures are dropped (two for section A4 and three for sections A1, A2, and A3).

No makeup quizzes will be given. A missed discussion quiz counts as 0; the lowest discussion quiz score will be dropped. A missed lab counts as 0; the lowest score for the one-period lab experiments will be dropped. If you miss the two lab period experiment, it can be made up at the make up lab week at the end of the semester. If, due to unusual circumstances, such as prolonged illness, you miss more than one lab, please contact Dr. Golger (golger@bu.edu) as soon as possible so that special arrangements can be made to catch up with your work.

Overall course score: After each exam we will provide the distribution of overall course scores so far, on a 1000-point scale, and your individual score so far. These overall scores will take into account the scores on the work completed so far (lecture quizzes, discussion quizzes, labs, and exams). In this way, you will have a measure of how you are doing at that point in the course.

Course grade: The course grade is based on your overall course score. There are no fixed percentages of A grades, B grades, etc. Rather, we assign course letter grades based on our assessment of how someone should have performed to receive an A, B, etc. Based on past experience, it is likely that the average grade in the course will be in the C+ range.

Any question concerning the grading of a lecture exam, quiz, or laboratory report must be brought to the attention of your discussion or laboratory teaching fellow during the class session in which it is returned to you; material will not be accepted for regrading afterwards.