Skyline College A.J. Bates Professor of Chemistry

     Chemistry 220 - General Chemistry 2 - Spring 2015

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

Friday, May 29

  • Have a great summer! Good luck in all of your future endeavors!


Wednesday, May 27

  • The review session at 2:15 today will be held in LAB, 7-341.


Friday, May 22

  • REMINDER: The Final Exam is on Friday, May 29, from 8:10-10:40am
    Be sure to note the early start time!
  • See the Sapling Learning Website for ungraded Electrochemistry Practice Problems
  • Lab Test #2 Answer Key - you may pick up your lab test during the office hours next Tuesday or during the review session on Wednesday


May 18-20

  • You may need the following half reaction for questions on the electrochemistry handouts:
    CrO4 Reduction
  • The Electrochemistry worksheet answer keys are now posted.


Friday, May 8

  • Please see the LECTURE page for recently course notes on Redox Reactions & Electrochemistry


Wednesday, May 6

  • PS#11 is posted on Sapling Learning - It is due next Monday (5/11) by 9pm. Additional, ungraded Thermodynamic practice problems ar also posted.
  • See the lecture page for multiple new answer key postings.


Saturday, May 2


Friday, May 1

  • Important Note: There is NOT a limit to the number of times you may submit an answer to questions on PS #10. (The original instrcutions said that there was.)


Wednesday, April 29

  • Reminders:
    • Ksp individual trial values and averge values DUE at start of lab on Thursday.
    • Expt. 9 Report (pH titrations) is due Friday by Noon.
  • New Thermodynamics notes are posted on the lecture page. You should begin reading and problems in Chapter 20.
  • If you were an EYH presenter, please email me to let me know so that you will receive the Bonus points. If you were a go'fer, Ihave that information already. Thank you again for your hard work!


Friday, April 24

  • PS #10 is now posted on Sapling Learning. It will be due next Saturday, May 2 by 6pm.
  • The answer key for the Ksp 1 worksheet is now posted.
  • The course calendar is updated for next week.
  • Current Grade Posting
    • Notes:
      • The Exam #3 adjusted score is based on 10/10 being added to your score, calculated as follows: (your score +10)/110*100
      • The Course Adjusted Percent is based on dropping your lowest problems set and replacing your lowest lecture exam score with the better of the following:
        • The average of your lowest lecture exam score, the next highest, and the highest of your four exams, or
        • The average of your lowest lecture exam score, and the Final Exam (worth 2 lecture exams)


Tuesday, April 21

  • Experiment #10: Determination of the Ksp of an Organic Salt


Tuesday, April 14


Monday, April 13

  • I am not feeling well this evening and have decided to cancel lab for tomorrow, Tuesday, April 14.
  • Please note the following:

    • We have covered all of the conceptual material that will be included on the exam. We will discuss the next slide of the lecture notes (Titration of Dimethylamine) to review many of the concepts of acids and bases on Wednesday in lecture.

    • New material (Titration of diprotic acids & dibasic amines and pH indicators) will be covered on Wednesday in lecture, but will not be included on Exam #3.

    • See the lecture page for the rest of the answer keys for the Extra Practice Worksheets. (I have also indicated two worksheet problems that will not be covered until Exam #4.)

    • The lab activities posted for the next few sessions will simply be pushed back by one lab session.
      • The PRELAB and PRELAB QUESTION for Experiment #9 will both
        be due next Tuesday, April 21.

    • The only item that is still due before Exam #3 is Sapling Problem Set #9, due by Wednesday evening at 9pm.
      • I have eliminated one question that will not be covered on the exam. It will be placed on the next problem set. The students who have already answered it correctly will receive credit for it on the next problem set.
      • The last question on the Problem Set (now #11, after removing the one question) involves a diprotic acid, but is a simple titration problem, similar to a titration you likely did in your General Chemistry 1 class.

    • Ungraded Exam #3 Review Questions are also posted on Sapling Learning.

    • I strongly recommend using the extra time tomorrow to prepare for Exam #3!


Friday, April 10

  • Please see the Course CALENDAR for updates for next week.
  • Please see the LECTURE Page for newly posted answer keys to extra practice worksheets.


Sunday, April 5

  • This week in lab we will be working on Experiment #8: Buffer Solutions:
  • Lecture Powerpoint Slides - Buffers and pH Titrations:
  • Please see the CALENDAR for lab and due date updates for the coming two weeks.
  • Problem Set #9 is now posted and will be due next Wednesday, April 15 at 9 pm.
  • Reminder: PS #8 has been posted and active for some time already. It will be due this coming Saturday, April 11, at 6pm.


Wednesday, March 25

  • Experiment #2 Practice:
    • Rework exam Prelab Question #1
    • Rework your own data analysis, starting from your time data for trials 1-6 and trials 7-12.
      • Both orders you determine should be 1.
  • Experiment 4 - Student Data (previous semester)
    • I recommend determining Q for the reaction for Week 4 for both Esterification and Hydrolysis as extra practice for Lab Test #1.
    • Answer Key (for Week 4)
  • I am covering another instructor's classes next Monday from Noon-5pm. I have changed my Monday office hours to 9:15-10 am for that day and will also have office hours next Tuesday from 1:15-2pm. These changes are reflected on the course calendar. Otherwise, my office hours are at the usual times.


Monday, March 23

  • Problem Sets 7 & 8 are now posted on the Sapling Learning website.
    They are due at 6pm on April 4 and April 11, respectively.
  • Answer keys to two of the acid-base worksheets are now posted.
  • A gradesheet with your scores for materials that have already been returned to you will be posted later this week.


Tuesday, March 17


Sunday, March 15


Thursday, March 5

  • As announced by email, lab is cancelled for today. The lab activities scheduled for today will be moved forward to next Tuesday.
  • I recommend you use the extra time today to do the PS's and Equilibrium worksheet problems. We have covered all of the material on PS#5 and most of the problems on the Equilibrium worksheets.
  • The concepts on PS#6 and Equilibrium 4 relate to LeChatelier's Principle. The details of this topics are straightforward, and viewing the slides in the Equilibrium Lecture PDF and the section on LeChatelier's principle in the text should help you to solve those problems. We will discuss the details of LeChatelier's Principle in our next lecture.
  • REMINDER: Exam #2 is next Friday, March 13. It will cover Chapter 17 and the concepts of Equilibrium covered in lecture, lab, and on the worksheets & problem sets.


Wednesday, March 4


Tuesday, March 3


Monday, March 2

  • The Experiment #5 handout (updated for the current semester) is available on the LABORATORY page. Please have access to it during lab on Tuesday.
  • PS #5 (due Mar. 9 at 9pm) and PS #6 (due Mar. 11 at 9pm) are now posted.
    • This was originally intended to be one PS that I have split into two; however, each will be worth the full 6 points.
  • Equilibrium 1,2,3, & 5 answers are now posted.


Wednesday, February 25

  • As announced in lecture, you may submit the Experiment #3 Report up until 1pm on Friday. You may turn in in class or to me in my office anytime before then also. If I am not in my office, you are welcome to slide it under my door. (The custodians know I receive papers this way and they will leave them there for me.)
  • Tomorrow in lab, we will begin with the Day 2 titrations (or for those of you who need to prepare the experiment again, you will have that opportunity). Approximately one hour will be allotted to work with the chemicals and to perform your calculations. After that we wil be moving on to other topics and the laboratory equipment and chemicals will no longer be available to use for the session.


Friday, February 20

  • PS #4 is now posted.
  • New equilibrium powerpoint notes outlines are posted on the LECTURE page.
  • If you have not already, please begin reading and working book problems in Chapter 17 - Chemical Equilibrium.


Friday, February 13

  • Reminder: If the percentage you earn on Exam #1 is better than your quiz percentage, the two percentages will be averaged and your Quiz #1 score will be replaced with that percentage of 30 points. This will help to mitigate a poor performance on Quiz #1.
  • Problem Set #3 Notes on Sapling Learning:
    • You do not need to answer question #12. It is more complex than we have studied.
      • However, if you interpret the question with the second step as the slow step, then you can treat it like questions we have studied and apply the SSA.
      • I will NOT include this question in the final grading analysis.
    • You are not required to answer question #17. We have yet to cover the material for it.
      • However, considering the equilibrium and the reaction quotient (we will cover this on Wednesday) along with a stoichiometry table for equilibrium, you likely can still answer it.
      • I will NOT include this question in the final grading analysis.
      • A similar question will be included on the next problem set for credit.


Sunday, February 8

  • Experiment #2 Prelab Question #1:

    • Many students missed all of the points on the Experiment #2 Prelab Question #1 (the graphing problem).

    • Those students who made significant errors in the question will be offered their prelab assignment back tomorrow (Monday) in lecture to revise for partial credit. If you are already sure that you did not make the proper graph for the question or did not interpret it correctly, you are of course welcome to begin reworking it now. I recommend revising and resubmitting before you leave campus on Monday. The revised prelab must be turned in before the start of your registered lab session on Tuesday. I will be available to answer questions during office hours.

      • As will be the case with other assignments in the course turned in outside of class time, you may turn in to me in my office. If I am not in my office, you are welcome to slide it under my door. (The custodians know I receive papers this way and they will leave them there for me.)

    • Important notes: The revised prelab must be turned in before the start of your registered lab session on Tuesday. Once the lab begins, students who have not resubmitted their prelab will earn their original score. Students offered the option to resubmit who do not claim their prelab on Monday or do not resubmit will still earn their original score.

    • Please staple the revised prelab question #1 on top of your original prelab and put your name on it when resubmitting.
  • Problem Set #3 is posted on Sapling Learning.
  • Reminder: Quiz #1 will be administered at the start of your registered lab section on Tuesday, February 10.
  • Please bring the Kinetcs 1 Follow-up worksheet, the lab handout on Standard Deviation and the lab handout for Experiment #3 to lab on Tuesday.


Wednesday, February 4

  • Answer keys to Kinetics 1 and the Reaction Rates - Graphing worksheets are now posted on the lecture page.


Saturday, January 31

  • Thank you to all of the students who helped out with the EYH mailing on Friday! It went very well and we managed to complete the work for the mailing!
  • We will not NOT be holding a second mailing on Monday, February 2. However, there will be additional volunteer opportunites for EYH coming up, incluing the actual event on March 21.
  • Problem Set #2 is now posted on the Sapling Learning Website. It will be due next
    Saturday, February 7 at 6pm.
  • If you have not already, please print the Kinetics 1 and the Reaction Rates - Graphing handouts. Please bring them to lecture and lab - we will be referencing them this week.


Tuesday, January 27

  • EYH Spring Mailings - Your help is needed!

    • EYH Spring Mailing #1 – Friday, January 30
      • Room: 7-341 (CHEM LAB)
      • Time: 1:15 ~ 3:30 pm


January 2015

  • Welcome to CHEM 220 - General Chemistry 2 for Science Majors. I am looking forward to a productive, challenging, and rewarding semester.  
  • Our first CHEM 220 class meeting will be LECTURE on January 23 at 10:10 am in 7-310.

  • Our first LABORATORY sessions will be on Tuesday, January 27 at 9:20 am (AA section) and 2:10 pm (AB section) in 7-341.

    • It is very important that you attend your first lab session on Tuesday, January 27 and continue to attend in order to maintain your registration and/or waitlist priority. In the first 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. 
  • 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 & waitlist procedure 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 30 at 6pm.
  • 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 an important issue in all academic settings, and will be taken very seriously by the instructor of this course, and the college generally.

  • I recognize that most students conduct themselves with honesty and integrity. I also recognize that the actions of a few dishonest students and the impact of those actions on the academic process necessitate a frank and ongoing discussion of this issue.

  • Please review the Student Handbook information on Academic Integrity.



  • 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 Enrollment & Waitlist Information

  • As of 4 pm on January 20, the morning lab section is full with a waiting list, and the afternoon lab section has 2 openings. We will do our best to accommodate students, but it is possible that not everyone on the waiting list will be able to register for the class.

  • Continue to follow standard WEBSMART registration procedures and check your email account for WebSMART notifications up to the first day of CHEM 220 class - January 23.

  • Attend LECTURE on January 23 and LABORATORY on January 27. 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 lab day, please contact A.J. Bates 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 23 and the first laboratory class on January 27. 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 27 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 27. 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 23:
      • Add your name to the waitlist sheets for the course section(s) you wish to add to on January 23 during the LECTURE or January 27 in the LABORATORY.
        • Your priority will be after all those who waitlisted prior to the first day of classes.
        • Your priority will be the same as other students added to the waitlist on January 23-27.
        • If necessary, a lottery will determine relative priorites of students added to the waitlist on those dates.
      • Follow the same procedures (above) as all other students waitlisted for the course.

  • After January 27, 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!