Skyline College A.J. Bates Professor of Chemistry

     Chemistry 220 - General Chemistry 2 - Spring 2017

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

Monday, May 22, 2017

  • Note: Lab Test #2 is available for pickup during office hours this afternoon and tomorrow.
  • Current Grade Post Headers
    • Individual postings may be picked up in office hours today or tomorrow, or at the Final Exam on Wednesday.


May 17, 2017

  • Final Exam Review Session:
    • Friday, May 19: 10:10am - Noon in 7-104 (regular lecture time/place)
    • This review session will be driven by your questions.
    • Please see the calendar for office hours times for next week.
  • Office Hours: My Friday office hours are at a different time this week: 9:15-10:00 am.
    My other office hours are at the normal times this week.
  • Final Grade Adjustments - your adjusted course percent will reflect the following:
    • Your Quiz 1 score was replaced with the average of your Quiz 1 score with the Exam 1 score adjusted to 25 points (if Exam 1 was better)
    • Your lowest Problem Set score will be adjusted to 6/6 (rather than dropping the lowest - this is slightly more beneficial to your percent)
    • Your lower Lab Test score will be replaced with the average of both Lab Tests.
    • Your lowest Lecture Exam score will be replaced wth the better of the following:
      • The average of your lowest and two highest Lecture Exams
      • The average of your lowest Lecture Exam and the Final Exam


May 16, 2017


May 14, 2017

  • See the lab page for an extra practice problem for Experiment #12
  • See the lecture page for Electrochemistry Worksheet answer keys


May 11, 2017

  • Reminder: The AA lab section will start at 10 am today.


April 25, 2017

  • Reminder: Today's office hours (Tuesday) will be from Noon - 12:30pm
    due to a Chemistry Department responsibility.
  • Tomorrow (Wednesday), I will hold office hours from 1-2pm.
  • Grade Conferences:
    • If you currently have an ADJUSTED PERCENT below 75%, please consult consult with me during lab or office hours this week to discuss your class performance.
    • Even if you have a higher percentage, I encourage you to discuss your progress with me if you are hoping to make improvements to your current grade.
  • Reminder: The Withdrawal Date for the course (Grade=W) is this Thursday, April 27.
    After that date, you will recieve the letter grade earned for the course (A,B,C,D,F).


April 21, 2017

  • Experiment #10: Determination of the Ksp of an Organic Salt
    • Lab Handout
      • Please prepare a standard prelab; however, the prelab question is NOT required.
    • Class Data
      • Be sure to include this data (adding to it the appropriate average/standard deviation analysis discussed in lab) along with your report!
    • Solubility (from the CRC Handbook of Chemistry & Physics):
      • KHT (Potassium Hydrogen Tartrate) = 0.42 g/100 mL at 15ºC
      • PbCl2 = 0.99g/100mL at 20ºC
  • Problem Set #10 is due on Monday, 4/24 by 9pm (note that this is an extension).
  • Problem Set #11 is due on Saturday, 4/29 by 9pm.
  • Ksp worksheet answer keys are posted.


April 18, 2017

  • Exam Statistics and Current Course Grades

    • Low Score Lecture Exam Adjustment: Your lowest lecture exam score in the course will be replaced with the average of your lowest lecture exam score and your two highest lecture exam scores. This is a de facto curve that is based only on your own performance. You are not competing against other students.

    • Your lowest problem set score in the course will be adjusted to full credit (6 points).

    • Current Course Grades - includes newly-recorded items since the last posting and the "adjusted percent" reflects the above two adjustments applied to your current course scores.

      • Exam Scores Analysis - summary of your Exam 1-3 scores, and the analysis of the current lowest exam score with the adjustment based on your current two highest exams.


April 17, 2017


April 12, 2017

  • As announced, my office hours on Thursday, April 13 will be from 1-2pm.
  • We will perform Expt. #10: Determination of the Ksp of an Organic Salt next Tuesday in Lab
    • Lab Handout
      • Please prepare a standard prelab; however, the prelab question is NOT required.


April 11, 2017


April 10, 2017


April 1, 2017

  • Have a great Spring Break!
  • I will not be on email again until April 5 or 6, but will be checking occaisionally after that for the remainder of the break.
  • Please see the lecture page for newly-posted worksheet answer keys.
  • Sapling Learning:
    • Sapling PS #8 (originally due March 29) is now due on April 5 by 9pm.
    • Sapling PS #9 is due on April 12 by 9pm.
    • There are also extra practice problems posted on Sapling Learning


March 27, 2017

  • Please print the handout on pH titration for tomorrow's lab. Nothing will be due, but we will be referencing and using materials in the handout.
    • Experiment #9: pH-monitored Titrations
    • You may also want to print the following. You will be preparing a standard formal prelab and report for Experiment #9. The general class guidelines for lab reports apply.


March 26, 2017

  • Reminder: The Experiment #8 mini-report is due Friday (3/31) by Noon. You may turn in anytime in lab or before or after lecture this week. You may also give to me in my office, or slide under my office door. I will also accept electronic submission.


March 23, 2017

  • I am not feeling well and have decided to cancel lab for Thursday, March 23.
  • Please check the website later today for updates to the class schedule.
  • I expect to be back on Friday for lecture, but will email and/or post to the website if that is not the case.
  • Remember that there are SI Sessions at 12:10 on Thursday and 11:10 on Friday.


March 22, 2017

  • Be sure to check Sapling for problem sets and the course calendar for lab due dates.
  • Acid-Base worksheet answer keys are posted on the lecture page
  • Lab Test #1
    • Reminder: Lab Test #1 will be held on Thursday, March 30
    • Lab Test #1 will cover Experiments #1-7, and General Lab Information / Procedures / Safety.
      • The experiment focus will be on interpreting data or results similar to experiments performed in the course.
      • See the LABORATORY page for Lab Test #1 Practice materials.
    • Part of the lab session on Tuesday, March 28 will be for the lab test review - this will be an in-class opportunity to ask questions on the experiments, previous-semester lab tests, etc.


March 10, 2017

  • Class Data for Experiment #4 is posted below and on the lab page.
    The Report is due on Thursday, March 16 in lab.


March 7, 2017


March 6, 2017

  • Reminders:
    • The morning lab (AA section) will start at 10:00 am tomorrow morning (3/7/2017).
    • The afternoon lab will start at the regular time, but may finish early.
    • The Experiment #5 Report (Keq/Spectrophotometry Lab) is due at the start of lab tomorrow.


March 2, 2017

  • Problem Set #6 is posted on Sapling Learning, along with an ungraded practice for Exam #2.
  • Based on when students seem to be using office hours and due to changes in meeting times, I am making some minor adjustments to office hours. Starting tomorrow, my office hours will be as follows:
    • Mon/Wed: 12:15 - 1:30 pm
    • Tues: 1:00-2:00 pm
    • Thurs/Fri: 12:15-1:00 pm
      • Office hours can also be made by appointment.
  • Expanding Your Horizons (EYH) Conference
    • Volunteers (Go'fers) Needed!
      • Saturday, March 18
      • Time: 7:00 am - 4:30 pm
    • Orientation:
      • Friday, March 17
      • Time: 2-3 pm
      • Room: 7-106
    • Please sign-up if you can help out!


February 24, 2017

  • CHEM 220 lecture is cancelled for today due to instructor illness. Please check back later today for website updates.
  • I recommend completing reading on Chapter 17 this weekend if you have not already.
  • I have posted PS #5 to Sapling Learning. It will be due next Friday, Mar. 3 by 9pm. However, I recommend starting it now. We have discussed all the topics covered already, except for details relating to questions #7-8, however, these are introductory-level questions on LeChatelier's Principle that should be easy to answer based on the reading.
  • Additional worksheet answer keys are posted on the lecture page. I recommend working problems on Equilibrium 1-3 worksheets. You can likely also answer many of the questions on Equilibrium 4-7 at this point as well.
  • The lab schedule for next week is posted on the course calendar and reflects the updates discussed in lab yesterday.


February 16-17, 2017

  • Current Grades (corrected)
    • Use the randomly-generated 5-digit code that I provided to you in lab today to find your score.
  • The Prelab for Experiment #5 is due Tuesday, Feb. 21 at the start of lab.
  • PS #4 Notes:
    • This was originally due on Saturday, but will be now be due by 9pm on Tuesday, Feb. 21.
      I recommend starting now if you have not already!
    • Hint for question #12: Consider taking a square root of the K equation to avoid having to use the quadratic equation.
    • Question #13: This is a bit beyond where we are in the lectures currently, so it is not required. I cannot change the scoring while an assignment is in progress, but after the problem set is complete, I will eliminate it from the problem set and award a +1 bonus point for a correct response.
  • The lab report for Experiment #2 (Initial Rates), originally due at the start of lab today, will be accepted until the start of your regularly scheduled lab on Tuesday, Feb. 21 for only a 2-point deduction. After that, deductions will be applied as outlined on the syllabus from the original due date.
  • The lab report for Experiment #3 (t-BuBr) is due Thursday, Feb. 23 at the start of your lab session


February 10, 2017

  • We will begin Experiment #4 in lab on Tuesday, February 14. However, no prelab is due on Tuesday.
  • Reminder: The Expt #2 Report is due Thursday, February 16. As discussed in lab, the discussion requirements have been revised (less is required - see below).

    • From the lab page:
      • Experiment #2: Determination of a Rate Law by the Method of Intial Rates
        • Lab Handout
        • Statistical Analysis: Standard Deviation
        • Important Change:
          • For the Experiment #2 report, you are not required to provide the complete DISCUSSION section as outlined in the handout. Instead, comment on the value of k, the standard deviation, and what the relationship between them says about the precision or accuracy of your data.
        • For all other sections, follow the guidelines in the handout.


February 8, 2017

  • Reminders: Exam #1 is on Friday, Feb. 10 in lecture.
    • Please arrive as close to 10am as possible so that we can begin promptly at 10:10 am.
    • Exam Topics:
      • CHEM 210 Review Topics (Solutions, Stoichiometry, Titrations)
      • Kinetics (Focus of the Exam)
      • Introduction to Equilibrium
  • The reading sections and problems from chapter 17 that are most relavent to the exam are sections 17.1 & 17.4, and the sample problems 17.7 and 17.8.
  • An UNGRADED extra practice assignment has been added to Sapling Learning. The problems are the type of quantitative problem on equilibrium covered on Exam #1.
  • Thank you to all of those who helped with the EYH mailing the last couple of weeks!
  • Office Hours this week:
    • Wednesday: 12:30-2pm (expanded)
    • Thursday: 1:15-2pm (time change and meeting in 7-341)
    • Friday: 12:15-1pm (College meeting immediately following)
  • Thursday (2/9) afternoon the lab will open early at 1:15 pm.
    • Open Lab: 1:15-2pm
    • Class start time: 2:10 pm
    • Experiment #2 Report discussion will start ~ 2:10-2:25 pm. Please organize any lab work to allow yourself to step away from your experiment at that time.


February 5, 2017

  • Quiz #1 Answer Keys
  • Grading Note: If your Exam #1 percentage is higher than your Quiz #1 score, then it will be replaced with the average of your Quiz #1 score and and the percentage you earn on Exam #1 (adjusted to 25 points).


February 1, 2017

  • Problem Set #3 is posted. It will be due a week from today at 9pm. See the calendar for PS and lab due dates for this week and next.


January 30, 2017

  • Thank you to all of those who helped with the EYH mailing on Friday!
  • The Kinetics 1 Answer Key is posted.
  • Check the calendar to remind yourself of lab and PS due dates as well as quiz and exam dates.
  • Supplemental instruction sections this week with Dylan (
    • Tuesday 12:10-1:10pm
    • Thursday 12:10-1:10pm
    • Friday 11:10am-12:10pm
  • Room: SI Room B - Bldg 5 - Learning Center (Walk-in turn left)


January 26, 2017

  • Please see the Course Calendar (link to the left) for lab activities, office hour changes, and due dates for this week and next.
  • EYH Mailing - Your help is needed!
    • Friday, Jan. 27
    • Room 7-238 (Bio Lab)
    • 1-3:30 pm (OK if you cannot arrive right at 1pm)


January 24, 2017

  • Reminder: Problem Set #1 is due by 9pm tomorrow, Wednesday, January 25.
  • I have also posted Problem Set #2: It is due next Tuesday, January 31 by 9pm.
  • You can still register for Sapling Learning and use it through Monday, January 30 without paying (note that this is one day before the next due date – plan ahead!). After that point you will need to pay to continue to use it.


January 23, 2017

  • Supplemental instruction sections this week with Dylan (
    • Tuesday 1-2 pm (updated)
    • Thursday 12:10-1:10pm (updated)
    • Friday 11:10am-12:10pm
  • Room: SI Room B - Bldg 5 - Learning Center (Walk-in turn left)


January 2017

  • Welcome to CHEM 220 - General Chemistry 2 for Science Majors.
    I am looking forward to a productive, challenging, and rewarding semester! 
  • Our first class session will be the LABORATORY onTUESDAY, January 17
    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 and continue to attend the lab in order to maintain your registration and/or waitlist priority. In the first lab session, we will discuss the lab portion of the syllabus, enrollment, and cover important safety information that is required to participate in the laboratory.

    • Parking may be a challenge the first couple of weeks of classes, so I encourage you to arrive to campus early!
  • 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.
    • From the expanding menus, select Skyline College, General Chemistry, Semester 2.
    • Then select Skyline College - CHEM 220 - Spring 17 - Bates.
    • When you register for the course on the system, you may select to use it for the first two weeks of the semester for free. You must then pay to continue to have access.
    • The first Sapling Learning problem set and an introductory BONUS problem set are already posted.
    • The questions in Sapling Learning use the Adobe Flash Player. If you are having difficulties getting a question to load, it is probably an issue with Flash. The best way to access the site is using Google Chrome on a computer. If you use Safari on a computer and the questions are not loading, you will need to update your Adobe Flash Player to the latest version. The questions do not load on iPhones and iPads.
  • The course text, Chemistry, 7th ed. by Martin Silberberg,is available as a custom edition in the Skyline College Bookstore. If you are purchasing new, this is a much less expensive option than buying the full text book. However, you are also welcome to use the 5th or 6th edition of the textbook for the course. You may be able to find those online at a much lower price. It is very important that you have a copy of the textbook (in any of these 3 editions). The readings and assigned problems from the text are essential to the course.
  • Please 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.