Skyline College A.J. Bates Professor of Chemistry

     Chemistry 220 - General Chemistry 2 - Spring 2018

Chem 210 - General Chemistry 1Chem 235-238 - Organic Chemistry 2 Chem 220 - Lab Manual & Extra Practice ProblemsScience Lecture Series
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Announcements & Important Course Information

Saturday, April 21

  • A new Sapling Learning Problem Set was posted Friday morning and will be due Sunday, April 29.
  • The class data for the Ksp experiment will be posted on Monday.
    The report will be due Friday (April 27). You can complete most of the report without the class data.
  • Reminder: The Experiment #11 PRELAB is DUE by NOON on MONDAY
    • The PRELAB should include:
      • Proper Heading
      • PURPOSE
        • We are finding a number of Thermodynamic properies for the reaction.
          Be sure the purpose reflects that.
        • Must include the balanced equation for the reaction studied - clearly label.
        • It is also a good idea to include the balanced equation for the titration used to study the borax dissolution. If you do, be sure to clearly differentiate it.
        • Briefly SUMMARIZE the procedure and EXPLAIN how the procedure, data, and analysis will allow us to determine the thermodynamic quantites we are interested in.
        • As always, the table(s) should reflect data to be collected AND the results of calculations using the data.
        • There should be one principle data/results table that includes the measurements and results of all six temperature trials. Leaving room for additional trials is a good idea.
        • SUBMIT with the PRELAB.
      • Prelab Questions are NOT due at this time.
    • SUBMIT as a hardcopy document OR electronically by emailing me a single PDF document.
  • The grade listing on CANVAS was updated on Friday.

    • It reflects all completed work in the course except EXAM 3, the EYH Go'fer/Presenter BONUS, and
      the EXPT. 9 (pH Titration) REPORT.

    • I expect to finish grading EXAM 3 over the weekend and will have the exam grades and EYH BONUS posted by lecture on Monday. I also expect to return the exams in lecture on Monday.

    • Please review your current total percentage, your individual assignment and exam scores, and email me ASAP if there are any discrepancies.

    • The withdrawal date for this course is Thursday, April 26.

    • If you are considering withdrawing, please meet with me early in the week to discuss before you do to make sure it is the right choice for you.

    • Please also meet with me soon if you would like to discuss ways to improve your performance as we move into the last 4 weeks of classes. We still have an exam, a lab test and the final exam (counts as two exams) to go.


Monday, April 16

  • Reminder: Prelab Assignment for Experiment #10 (Ksp) is due today at Noon.
    • Submit a Standard Prelab: Heading, Purpose (including the balanced equation for the reaction studied), General Strategy, and a copy of the Data/Results table to be used for the full experiment. If you did NOT attend lab last Thursday, also include the Prelab Question, as it was completed as an in-class assignment.
  • The report for Experiment #9 (pH-monitored Titrations) is due by this Friday at Noon. During the stirring portion of tomorrow's Ksp experiment, there will be an opportunity to ask questions on the interpretation of the graphs. I recommend that you bring your draft or completed graphs with you for discussion/assistance.
  • Office Hours revisions for this week. See the Calendar for the up-to-date schedule.
    • Monday: I will be holding my 10:10-11am office hours; however,
      I will not be available from 12:10-1pm today.
    • Tuesday: I am moving my office hours to 12:10-1pm.
    • Friday: I am having an extra office hour from 12:10-1pm.


Friday, April 6

  • I will be holding my normal office hours today from 10:10-11:00 am
    and extra office hours from 12:10-1:00 pm


Friday, March 23

  • Have a great Spring Break!
  • I will be checking email regularly through Monday, March 26. After that, I will not be checking regularly again until Monday, April 2.
  • Grades are posted on CANVAS. If you find a discrepancy for a graded item, please email me a picture of the front oage of that item.
  • Be sure to scroll to the bottom of the lab webpage for Lab Test #1 review materials.
  • Several new answer keys are posted for extra practice worksheets.
  • Have a great Spring Break! I will be checking email regularly through Monday, March 26. After that, I will not be checking regularly again until Monday, April 2.
  • My top 4 favorite films (in order)
    • The Empire Strikes Back
    • Star Wars (A New Hope)
    • Rogue 1
    • Return of the Jedi


Thursday, March 22

  • Be sure to complete Sapling PS #7 by 9pm on Sunday, 3/25 (the due date was extended from tomorrow). PS #8 is also posted if you would like to start it over Spring Break. The due date is after the Break and is on the calendar.
  • Lab schedule for the week after Spring Break:

    • Tuesday, 4/3:

      • Carry out Experiment #9 pH Titration - Part B (and Part C, time permitting)

      • DUE: Prelab for Experiment #9 Parts B & C ONLY
        • Standard Prelab for Parts B&C
          (Be sure to clearly differentiate the purposes and generic reactions for parts B&C).
        • Prelab questions are not due until Friday.

      • DUE: Mini-Report for Experiment #8 - System 3 ONLY
        • System 3: Sorensen's Buffer
          • Provide tables of your data for Part 3
          • Show the calculation for the initial pH of the buffer
          • Show the calculation of buffer capacity (Both for acid and for base)
          • Make the requested pH vs. moles (or mmol) of acid / base plot.
            • This is a single graph!
            • You may plot by hand (make a full-page graph) or using Excel or other graphing software.
            • If plotting in Excel, make the volume of the HCl added negative in order to achieve a properly formatted plot.
          • Post-lab Questions are OPTIONAL, but recommended.

    • Thursday, 4/5:
      • Lab Test #1
      • Carry out Experiment #9 pH Titration - Part C


Wednesday, March 21


Friday, March 2

  • Please see the CALENDAR for updated DUE DATES for next week.
  • Please see the LECTURE page for worksheet updates and powerpoint slides for Acids & Bases.
  • Please PRINT the following lab handout to bring to lab on TUESDAY:
  • Office Hours TODAY:
    • 10:10-11 am
    • Noon - 1pm (extra time added for this week)
  • Exam #2 is just a week and a half away! Keep up-to-date on your studies and practice problems for the exam. Come to office hours with questions, and visit Dylan's PI sessions for questions and practice:
    • Days: Monday/Wednesday/Friday
    • Time: 1:30 - 2:30 pm
    • Room: 8-306
  • Expanding Your Horizons (EYH) Conference
    • Volunteers (Go'fers) Needed!
      • Saturday, March 17
      • Time: 7:00 am - 4:30 pm
    • Orientation:
      • Friday, March 16
      • Time: 2-3 pm
      • Room: 7-106
    • Please sign-up if you can help out!


Wednesday, February 28

  • Experiment #6: LeChatelier's Principle (revised Spring 2018)
    • Lab Handout - Though some minor changes may still be made,
      this file is ready to print
    • Prepare data table in your Lab Notebook for Systems 1,2,3 - one data table per page
  • Office Hours for the rest of this week:
    • Wednesday:
      • 10:10-11 am
      • Noon - 1pm
    • Thursday:
      • None outside of class; however, I can answer questions during lab time.
    • Friday:
      • 10:10-11 am
      • Noon - 1pm (extra time added for this week)


Tuesday, February 20

  • Please see CANVAS for your scores in the class. Please let me know as soon as possible if there are any discrepancies. (Note: Exam 1 and Adjusted Quiz #1 scores will be posted later today.)
    • Quiz #1 Grading Note: If your Exam #1 percentage is higher than your Quiz #1 percentage,
      then your Q1 score will be replaced by the average of the Q1 score and the E1 score
      (adjusted to 40 points) counted twice.
      • For example, if you earned 24/40 (60%) on the quiz, but then earned 90/100 (90%) on the
        exam (equivalent to 36/40 quiz points), then your adjusted Q1 score will be the
        average of 24, 36, and 36, which is 32/40 (80%).


Monday, February 19

  • Experiment #3 Data Analysis Notes:
    • Make your order determination based on the ROOM temperature trial.
      • Becasue we observed a much higher percentage of the reaction, you should be able to make the most accurate determination from this trial.
      • You may then assume that the reaction proceeds by the same mechanism and will have the same order at low temperature. You will not be making a separate determination for the low temperature trial. This is a very reasonable assumption. Experimental data for most reactions show that mechanisms do not change with temperature.
    • Please be sure that you are getting enough significant digits for the slope of your line.
      • For the graph that represents the order for the reaction, be sure that you have a minimum of 3 significant digits for the slope of the line as calculated by the software's linear regression function.
      • In MS Excel, right-click on the equation box and change the format to "number" and include enough decimal places to get 3 significant digits in the slope. This may not work if you have modified the equation. If that is the case, remove the trendline and then add it again. I will demonstrate this Tuesday in lab.


Sunday, February 18

  • Please be sure to check the dates on the course calendar for items due this week.
  • PS #4 on equilibrium was posted a few days ago. It will be Monday, February 26 at 9pm.
  • Please complete the reading in Chapter 17 and begin working the book and extra practice problems.
  • As announced, the handout for Experiment #5: Determination of Keq by spectrophotometry
    was posted on Thursday afternoon.


Monday, February 12

  • As announced in lecture today, I have to see an orthopedist tomorrow morning and must cancel the morning (AA - 9:20am) lab session for tomorrow, February 13.
    • I plan to hold office hours from 12:30-2pm in my office, and a
    • Recitation session in lab (7-341) starting at 2:10 pm.
      • This session will be optional and open to students from both lab sessions.
      • NOTE: If my appointment runs long - I will update the class calendar.
  • Dylan will hold a PI session Tuesday as well from 1-2 pm in 8-302.
    • This is in addition to his Monday & Wednesday Sessions from 1:30-2:30 in Room 8-306.
  • Our other lab session activities have not been changed; however, I have updated some due dates. Please see the calendar for all of these updates!
  • The Prelab for Experiment #4 is due at the start of lab on Thursday. It is made up of the Purpose, Equation for the Reaction, and the two Data Tables – one for Hydrolysis and one for Esterification. (Be sure to put in the two data tables in the notebook – you do not need to copy in the analysis tables.)
  • Reminder: Exam #1 will be held in lecture on Wednesday. Please arrive a bit early if you can (by ~9am) so that we can start the test promptly at 9:10am.


Sunday, February 11

  • We will be doing some review for Exam #1 in lecture on Monday. Please come with questions on worksheets, problem sets, book problems, or concepts to help drive the review session.
  • We will discuss requirements for Experiment #4 during lecture tomorrow.
  • As discussed before, Exam #1 will cover review material from General Chemistry 1 (particularly concentration and stoichiometry), Chapter 16, and the lectures and problems covered on Kinetics, and our Introduction to Equilibrium (only parts of chapter 17).
  • Specifically, the topics from Equilibrium to focus on are:
    • Concept of chemical equilibrium
    • Reaction quotient, Q, and K
    • Calculating K from equilibrium conditions (easy)
    • Calculating a single equilibrium concentration when K and the others are given (easy)
    • Calculating K from initial conditions and limited equilibrium information – makes use of an I-C-E table (moderate - similar to my last example on Friday)
  • The above concepts are covered in an ungraded Sapling Learning Problem Set posted Saturday morning.


Monday, February 5

  • Please download the Unit 2: Equilibrium notes from the LECTURE page for class on Wednesday.


Saturday, February 3

  • I am feeling much better this morning. Thank you so miuch for all of the kind messages that I received in the las couple of days! Have a good weekend, and I plan to see you Monday.


Friday, February 2

  • I am still not feeling well tonight, so I have decided to cancel class for Friday, February 2.
  • I am postponing the due date for the Experiment #3 prelab question to Monday at Noon.
  • I am also postponing the Lab Report #2 by a day to Wednesday at Noon.
  • The calendar reflects the above updates.
  • Dylan will still be holding his PI session from 1:30-2:30 in 8-306 on Friday as well. I recommend using this time to help reinforce your understanding of the recent material, and to ask questions relating to the prelab questions. 


Thursday, February 1

  • I am not feeling well this morning and I have decided to cancel lab for today, February 1, 2018.
    • I recommend using this time to work on/complete your Experiment #3 Prelab Questions or Experiment #2 Report.
    • I also posted the Sapling PS#3 yesterday, and will update the website with some of the extra practice worksheet answer keys later today.
    • I do plan to answer emails today, so you can send questions to me that way.
    • I hope to return tomorrow. However, please check the website/email early tomorrow morning for an announcement either way.
    • Have a good day!
  • PI Session with Dylan:
    • Days: Monday/Wednesday/Friday
    • Time: 1:30 - 2:30 pm
    • Room: 8-306


Wednesday, January 31

  • Sapling Problem Set #3 is now posted.


Friday, January 26

  • EYH Mailing #2:
    • TODAY
    • Room 7-341(our lab room)
    • 12:30 ~ 2:30pm
  • On Monday, I will only be holding my 10:10 - 11 am office hours. I will not be available in the afternoon.


Tuesday, January 23

  • Reminder: Please be sure to bring a printout of the Kinetics 1worksheet to lab today.


Saturday, January 20

  • Thank you to everyone who helped out yesterday with the EYH mailing! We got a big part of the work done, so we will only need to do one additional mailing in the coming week. I will announce the day, time, and location on Monday.
  • The next note set is updated and ready to download/print: Kinetics, part 2: VIEWPRINT


Friday, January 19

  • The calendar issue appears to be resolved.
    Please see the calendar for next week's lab activities & due dates.
  • EYH Mailing #1:
    • TODAY
    • Room 7-341(our lab room)
    • 12:30 - 2pm(?)
  • There will be 1-2 additional mailings in the coming week.


Wednesday, January 17

  • Academic Excellence Workshops (AEW) will be offered by Dylan Rigling this semester. Plan to make use of this important resource for tutoring and supplemental instruction in the course. Dates & times for meetings will be announced based on your time preference surveys.


January 2018

  • Welcome to CHEM 220 - General Chemistry 2 for Science Majors.
    I am looking forward to a productive, challenging, and rewarding semester! 
  • CHEM 220 Spring 2018 Syllabus
    • This is the official course syllabus. Please print it if you would like a hardcopy. Please take note of the Quiz #1, Lab Test, and Exam dates. (Some dates differ from the DRAFT syllabus previously posted.) Make-ups are not possible, so it is very important that you are in class on those dates. If an exam or test date changes, you will be given at least one week's notice prior to the new date. Additional quizzes may be given and may or may not be announced.
  • Our first class session will be the LABORATORY onTUESDAY, January 16
    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, so I encourage you to arrive to campus early!

    • For detailed waitlist procedures, follow this link.
  • The course text, Chemistry, 8th 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 textbook. However, you are also welcome to use the 5th, 6th, or 7th 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 editions). The readings and assigned problems from the text are essential to the course. I also recommend purchasing the Student Solutions Manual to accompany your edition of the text. If you are buying online, please do this well before the start of classes so that you will have the text to work from when classes start.
  • If you would like to get started preparing for the course, 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.
  • Sign up for the Sapling Learning Online Homework System:
    • The course should be available at least a few days prior to the start of classes.
    • 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.
    • 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 available.
    • 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.

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.