Skyline College A.J. Bates Professor of Chemistry

     Chemistry 220 - General Chemistry 2 - Spring 2014

Chem 210 - General Chemistry 1Chem 235-238 - Organic Chemistry 2 Chem 220 - Lab Manual & Extra Practice ProblemsScience Lecture Series Gay Straight Alliance

Announcements & Important Course Information

May 26

  • Thank you for a rewarding and enjoyable semester! I hope that you have a great summer, and I wish you the best in your upcoming academic and personal endeavors.
  • I will be on-campus on Wednesday, May 28 from ~11:30am-1pm. I have a meeting ending at approximately 11:30, so if I am not back to my office right at that time, I should be soon after. You are welcome to view your final exam at that time, or pick other papers you have not collected.


May 23

  • Final grades should be available by the end of the day Monday (but possibly sooner). Please check back.


May 19


May 13

  • See the lecture page for additional answer key updates.


May 9

  • Practice Problem: pH titration
    • Handout was provided (and corrections made) in lecture. This is the corrected version posted.
    • Answer Key
    • The pH titration problem on the Lab Test 2 will be a monoprotic acid (similar to this one and to the sample on the old lab test #2).
  • Part of the lecture session on Monday will be alotted for questions relating to Lab Test #2.
  • The due date for PS#11 on Sapling has also been extended by one day to Thursday, May 15 at 8pm.


May 1

  • Because of a professional obligation, Professor Ruis will not be available for office hours next Thursday, May 8. However, lab will go on as scheduled.


April 21

  • Ksp and Thermo Worksheet answeers are posted.
  • REMINDER: Both a graded and extr practice problem set were posted to Sapling on Sunday evening. The graded PS is due Thursday at 8pm.


April 21


April 19

  • Problem Set #9 is posted on Sapling Learning. It will be due next Saturday, April 26 at 5pm.


April 17

  • The possible unknown diprotic acids for Part C of the pH titration experiment are:
    • L-tartaric acid
      • pKa1 = 2.89
      • pKa2 = 4.4
    • oxalic acid
    • succinic acid
  • Important information (from the class email sent this morning):

    • On the post-lab questions for Experiment #9 (pH titration), you may answer both questions for the acid in Part C as well. The only clarification I would offer for handling it is to consider the overall equivalence point on post-lab question #2.

    • I will accept your Experiment #9 Lab Reports for full credit up to 12:30pm on Friday, April 18 in case you do need the extra time to complete the post-lab questions, or to ask questions today in lab. If I am not available when you come to turn them in, you may slide them under my door.

    • Experiment #10 Class Data will be posted later today on the course website.

    • I recommend printing and bringing the Experiment #11 handout to lab with you today as well as the Ksp 1 worksheet.

    • AB Section: If you do not turn in your report today, you may turn in your reports to me on Friday and I will pass on to Professor Ruis.

    • AA Section: Reminder - lab will start at 10am today.


April 13

  • I have not been provided with a list of the EYH presenters. If you were a presenter, please email me the following informations so that I can add the credit to your course points for the next grade posting.
  • Grades Posting #2:
    • Reflects EYH Mailing Bonus
    • Reflects EYH Go'fer Bonus
    • Adjusted scores reflect the following:
      • Lowest problem set dropped
      • Lowest lecture exam score replaced with the average of the lowest lecture exam score and the two highest lecture exam scores


April 10

  • See the lecture page for newly-posted answer keys.
  • Note: Older worksheets may reflect Ka or Kb values taken prom other reference charts with slightly different vales. Follow the work to check your answers in those cases.


March 28-29

  • Current Scores Posting
    • You will find your scores posted by the randomly-generated five-digit code provided to you yesterday in lab
    • Posting reflects the five points added to your Exam #1 score
    • Other adjustments and bonus points will be figured in later
  • See the LECTURE page for Buffers and pH Titration Worksheet Answer Keys


March 21

  • Experiment 4 - Student Data
    • I recommend determining Q for the reaction for Week 4 for both Esterification and Hydrolysis. You may also calculate for other weeks.
    • Answer Key (corrected version)
  • Lab Test #1 will cover Experiments 1-7
  • Problem Sets #7 & 8 are now posted on Sapling Learning.
    • They will be do after Spring Break, but I recommend beginning them now.
    • We will have covered all of the material for them prior to Spring Break.
    • You will have 5 attempts per question with no deduction per attempt.
  • An Acid-Base (Exam #3 Review) practice set is also posted on Sapling Learning. This assignment will not be graded.
  • Answer keys to Acid-Base 3 & 4 worksheets are now posted.


March 18

  • Lab will be held as scheduled today. However, I will not be hloding office hours today, as I am going to a doctor appointment. I will have additional office/hour discussion time on Thursday and Friday.


March 17

  • I am having significant allergy issues this morning and am not going to be able to make it in to teach my classes today. Please see the website later today for updates. Have a good day.


March 13

  • Experiment #8 - System #3 Prelab Requirements :
    • DATA TABLE(S) on a new page
    • PARTS 1-2 STUDY ASSIGNMENT (You may use the handout below for your tables, but please show work on a separate page.)


March 11

  • Answer Key to the Exam #2 Review handout that was provided in lab.


March 2

  • Please bring the worksheets Equilibrium 4 and Acid-Base 1 to lab for discussion Tuesday.
  • A new problem set is posted. It will be due on Monday, March 10 at 8pm.
    • You can check your answers.
    • You can view solutions when you complete or give up on any question.
    • You have four attempts per question.
    • There is no penalty for incorrect answers.


February 27


February 19

  • Problem Set #5 is now available.
    • It will be due at 5pm on February 26.
    • Please note that you will have 4 attempts to correctly answer each question.
    • There will be no deduction for each attempt.


February 11

  • I am not feeling well and I have decided to cancel my classes for Wednesday, February 12. I will likely check email a few times during the day and will respond to questions on Sapling problem sets or other classwork.
  • I recommend that you continue reading and working problems in Chepter 17 and the corresponding Extra Practice Worksheets on the Lecture page regarding Equilibrium. Upcoming due dates for assignments are listed below and on the course calendar.
  • Thursday (morning lab section - AA) - Please check your email or the course calendar tomorrow evening to see if I am feeling better and plan to be on campus on Thursday.


February 9

  • Be sure to check your account regularly (or forward it to one you do check regularly). Important and/or time-sensitive announcements may be emailed to you at that address.
  • Please visit the course calendar regularly to check due dates. With the long weekend coming up, please make sure that you are aware of due dates and plan your studies and preparation accordingly. All of the following is reflected on the calendar:
    • Please note that Problem Set #4 was posted on Friday and will be due by 8pm on Tuesday, February 18. I have extended the due date to the day following the break to allow you an opportunity to visit office hours or your study group for final resolution of any questions you might have. Problem Set #5 will be posted this week and will be due at 5pm on Monday, February 24 (updated).
    • Your Prelab for Esterification/Hydrolysis (Expt. #4) is due in lab on Tuesday, February 11.
    • The Report for Experiment #3 (t-BuBr) will be due on Tuesday, February 18.
    • The Prelab for Experiment #5 will be due on Thursday, February 20. It uses concepts applied in Experiment 4 and in spectrophotometry experiments from General Chemistry 1. You may choose to begin the prelab for this experiment prior to the prelab lecture.


February 7

  • A new problem set is posted. It will be due on Tuesday, February 18 at 8pm.


February 6

  • Equilibrium 1 worksheet answer key is posted.
  • Question #12 on old exam #1 from Summer 2004 should be choice D.


February 4

  • As announced in lecture, the report for Experiment #2 will be due on Thursday in lab.


January 29

  • Expanding Your Horizons: Spring Mailing 2
    • Thursday, January 30
    • Time: 1:00 - 3:30 pm
    • Meet in room 7-204 (Biotech Lab)
  • Expanding Your Horizons: Spring Mailing 3
    • Friday, January 31
    • Time: 12:30 - 3:00 pm
    • Meet in room 7-204 (Biotech Lab)
  • Please bring printouts of the Experiment #3 Lab Handout and the Follow-up to Kinetics 1 to lab for discussion tomorrow.
  • Reminder: Quiz #1 will be administered in LAB tomorrow, Thursday, January 30
    • Will cover Solutions and Stoichiometry (including Titrations)
    • Will cover Reactions Rates:
      • Determinations of average or instantaneous rate (including graphical determinations)
      • Relative rates
      • Rate law determination by the method of initial rates.


January 27

  • Expanding Your Horizons: Spring Mailing 1
    • Tuesday, January 28
    • Time: 1:00 - 3:30 pm
    • Meet in room 7-204 (Biology Lab)
  • Expanding Your Horizons: Spring Mailing 2
    • Thursday, January 30
    • Time: 1:00 - 3:30 pm
    • Meet in room 7-204 (Biology Lab)
  • Problem Set #3 is posted on Sapling Learning. It will be due next Wednesday (Feb.5) at 5pm.
  • Answer Keys to Kinetics 1-4 worksheets are posted. Please print the Follow-up to Kinetics 1 to work in lab on Thursday of this week (Jan. 30).
  • We will complete the lectures on kinetics this week and begin discussing equilibrium on Friday or Monday. Please bring the Equilibrium notes outlines (or have easy electronic access to them) for lecture.


January 21, 2014

  • Reminder: Problem Set #2 is posted and will be due Friday at 5pm.
  • Please print the Kinetics 1 handout on the LECTURE page and bring with you to lab on Thursday for discussion and problem-solving practice (or, have easy electronic access to the handout on your phone/tablet/computer).
  • Please print the handout for Experiment #2 from the LABORATORY page for the lab lecture/discussion on Thursday in lab.
  • Please see the course CALENDAR for my office hours this week. I have some meetings this week, and there will be some changes to the regular time.


January 13, 2014

  • Welcome to CHEM 220 - General Chemistry 2 for Science Majors. Professor Ruis and I are looking forward to a productive, challenging, and rewarding semester.  
  • Skyline College classes start Monday, January 13.  Our first CHEM 220 class meeting will be LECTURE on that day at 10:10am in 4-148. Our first LABORATORY meeting will be on Tuesday, January 14 at 9:10 am (AA section) or 2:10 pm (AB section) in 7-341.

    • In lab, we will discuss the lab portion of the syllabus, enrollment, and cover important safety information that is required to participate in the lab, and have our first lab lecture. 

    • It is very important that you attend your first lab session on Tuesday, January 14 and continue to attend in order to maintain your registration and/or waitlist priority.

    • Parking may be a challenge the first couple of weeks of classes, so I encourage you to arrive to campus early!

    • Scroll down the page for more detailed enrollment information.
  • Sign up for the Sapling Learning Online Homework System:
    • Follow the above link.
    • If you have an account, log in. If you do not have an account, create an account.
    • Please enter your first and last names in the profile as they appear on your official Skyline record. If you go by a different name or a nickname, please put it in parentheses after your first name.
    • Select Skyline College.
    • Select General Chemistry 2 - CHEM 220 - Bates.
    • When you register for the course on the system, you will be able to use it for two weeks for free. You must then pay to continue to have access. This will give those students on the waiting list time to determine if they will be able to enroll in the course before purchasing.
    • Problem Set #1 will be posted soon. It will be due Friday, January 17 at 5pm.
  • If you would like to get started preparing for the semester, I recommend that you begin the reading and book problems (see LECTURE page) for Chapter 16 on Reaction Kinetics.
  • The following worksheets are from the General Chemistry 1 course and cover topics that will be critical in all of our work this semester - Stoichiometry and Solutions. I recommend that you work these problems as review. A quiz early in the semester will cover these topics and some of our initial work in Kinetics.

Academic Integrity

  • Academic integrity is a signficant issue in all academic settings, and will be taken very seriously by the instructors of this course, and the college generally.

  • The lecture and laboratory instructors will address the importance of academic honesty, and will discuss specific issues relating to academic integrity throughout the semester.

  • We recognize that most students conduct themselves with honesty and integrity. We also recognize that the actions of a few students, and the impact of those actions on other students, the course, and the college necessitate a frank and ongoing discussion of this issue.

  • Please review the student handbook information on academic integrity at the following link:



  • The prerequisite for CHEM 220 is:
    • Successful completion (C or better) of CHEM 210 (General Chemistry 1) or equivalent.
  • Please speak with me if you have any questions regarding your preparation for the course, or to if you wish to discuss whether another course is better suited to your academic preparation or goals. Please also ask if you have questions about prerequisites or the petition process.


Important Registration & Enrollment Information

  • Both sections of the course are full, with waiting lists.  We will do our best to try to accommodate students, but it is likely that not everyone on the waiting list will be able to register for the class.

  • Continue to follow standard WEBSMART registration procedures and to check your email account for notifications up to the first day of CHEM 220 class - January 13.

  • Please plan to attend both LECTURE and LABORATORY on January 13-14. You must attend one of the two lab sections on that day to maintain your enrollment in the course and/or your waitlist priority. If there is an unavoidable reason that you must miss during the first two days, please contact both A.J. Bates and Nancy Ruis in advance.
  • Waitlist priority will be observed for each lab section separately. If you are interested in more than one section, or wish to enroll in a different section, you must add yourself to the waitlist for that section.
  • Starting with the first day of classes:

    • If you are enrolled in the course section you wish to attend:
      • You are ready to go! Plan to attend the first lecture class on January 13 and the the first laboratory class on January 14. Attendance at lab is always required; however, it is particularly important that you continue to attend your scheduled lab classes during the first two weeks, or you risk being dropped from the course to make room for waitlisted students.

    • If you are waitlisted for a course section:
      • You are required to attend one of the two scheduled labs on January 14 in order to maintain your waitlist priority.
      • You need only attend one of the two sections on that day. I recommend attending your prefered section.
      • If you are enrolled in one course section, but are waitlisted for another, you may attend either section of the of lab on January 14. As long as you attend one of the labs, you will maintain your place in your enrolled section until you register in another (if a spot in your preferred section becomes available).

    • If you are unable to enroll in your preferred section and you are unable to add to the waitlist for it prior to January 13:
      • Add your name to the waitlist sheets for the course section(s) you wish to add to on January 13 during LECTURE.
        • Your priority will be after all those who waitlisted prior to the first day of classes.
        • Your priority will be the same as all those students added to the waitlist on January 13.
        • If necessary, a lottery will determine relative priorites of students added to the waitlist at that time.
      • Follow the same procedures (above) as all other students waitlisted for the course.

  • After January 13 & 14, if you are still waitlisted for your desired section:

    • You must continue to attend a lab section as instructed in order to maintain your waitlist priority. Add codes may be provided in lab. If you are not in class (or late) your add code may be offered to another student.

    • You must also attend lecture classes until you are able to add (or until it is announced that no additional adds will occur), as add codes may be provided in lecture. If you are not in class (or late) your add code may be offered to another student.

    • You must check the course website (this page) and your email every day for important enrollment information. Information relevant to all waitlisted students will be posted on the course website. Individual information may be emailed.

    • Please follow these instructions to maintain your waitlist priority. There are many students waiting to get into the course!