Table of Contents


Williamson's Chem 120

Contact me at

Please put "chem 120" in the subject line of your e-mail to me. I answer student e-mail first in my chem 120 folder and the others go into junk mail, so your messages will go to junk without chem 120 in the subject line! I only ck junk every couple of weeks or so!

PLEASE DO NOT USE @ OR to contact me- THESE WILL NOT GO THROUGH! Use if you need to contact me!


**Want to see a previous problem solving session? go to the protected homepage.

** Sample exams are now posted for Exam 1, with the solution video.

***COVID STATEMENT- from the syllabus and the faculty senate To help protect Aggieland and stop the spread of COVID-19, Texas A&M University urges students to be vaccinated and to wear masks in classrooms and all other academic facilities on campus, including labs. Doing so exemplifies the Aggie Core Values of respect, leadership, integrity, and selfless service by putting community concerns above individual preferences. COVID-19 vaccines and masking — regardless of vaccination status — have been shown to be safe and effective at reducing spread to others, infection, hospitalization, and death.

There are faculty, staff and students on campus who are more highly vulnerable to COVID than many of you are. I’m asking you to please wear masks in this class in deference to them and my family member who is immunocompromised. I very much appreciate your help in keeping the Aggie family well and my family safe during a challenging time. I will be in my mask!!

** When you see "NOT READY FOR F21" the section still reflects OLD information.


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Exam Reviews



Click Here to Access these items on the Protected Hompage (password will be given in class on 8/31 AND was in the class email)

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Click here for the answers to questions YOU probably meant to ask: Frequently asked questions from e-mail are posted here by topic.  There are also practice questions and answers.

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**IF YOU MADE A 'D' in chem 119, you really should consider retaking chem 119 or have a very good reason for this score if you decide to continue in chem 120. Ideally, you want to have all of the concepts from chem 119 firmly understood, so you can go on to chem 120. I will always remind you of the concepts we are building on, so you can review the material if you need to. Some students will be coming from 107 or from testing out of 119.

**What are my recorded grades??? See your grades on CANVAS!

NOT READY FOR F21**How do I calculate my MIDTERM grade??? Click here!
At midterm, we had 164 points possible (E1 = 100 pts, Homework 1-2 = 24 pts, Mini Exams for chpt 12/13, chpt 10/20, and chpt 14 = 30 pts, Tasks best 1 of 2 = 5 pts, Download 1= 5pts) NOTE: clicker points or lab points will not be in Midterm grades, nor will anything be dropped. This is NOT midway of the 750 pts possible in the lecture part of the course!! MIDTERM TOTAL POINTS AND LETTER GRADES WILL BE POSTED ON ECAMPUS.

NOT READY FOR F21**How do I calculate my FINAL grade???
Click here for an excel file that will download to your computer. You can enter all of your earned grades, plus estimate the future grades. Click here if you want a paper copy to calculate your grades with. These are tentatively correct. David and I will be checking these out during the week of 10/12.

**Is there any extra credit?  NO EXTRA CREDIT. (This is the policy for most college-level courses.) Only the credit offered on assignments, clickers, homework, exams is available.

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Dr. W's office hours on Zoom:

Monday from 3-4
Tuesday from 2:30-3:30
Wednesday from 1:30-3
Thursday from 10-11
or by appointment

Zoom Link:
For office hours:
You will need to use sso to log in with your TAMU UIN and password with this link

email me at:
**Please put chem 120 in the subject line of your e-mails to me. Otherwise, it will go to junk, which I only ck every week or so!

Maria's SI Hours F2F and Zoom:

Wednesdays from 6-7:30--F2F in ILCB 111
Sunday from 7-8:30 --- Zoom

Zoom Link:

email Maria at:

See the SI website-- In order to acces it, you must be signed in through your tamu account at:

Connor's IA Office Hours on Zoom:

Mondays from 10-11
Fridays from 10-11

Zoom Link:

email Connor at:

FREE Drop-In Tutoring

1)  Lab TA's hold office hours to answer your questions for both lab and lecture. The Face-to-Face hours are in HELD 215 from 8-5 M-F. The zoom hours are at this llink The passcode is; fyphelp. The 120 TA's have a schedule and are probably best if your questions are about 120 lab. If you have a lecture question, then there any TA should be able to answer it. begins on 9//6

2) THE TUTOR HUBS sponsored by the ACADEMIC SUCESS CENTER offers free drop-in ZOOM tutoring beginning Sunday, Sept. 5th. . For details of courses and schedules, please see their web site at: 458-4900. Their full schedule of courses and times will be listed on the website, by Friday, September 3rd.

3) Dr. Kennicutt, a retired prof, holds FREE chemistry helpdesk from 2-7 on Tuesdays, starting on 9/7 (EXCEPT 9/14). Her zoom code is 4947622423 with password: helpdesk. Students can contact her at gmail ( and her cell: 979-492-0262. She also does private tutoring for Chem 119/120/107 and lab on Zoom or in person as well.

PAID Individual Tutoring
See me during office hours for ideas about individuals who will tutor for hire in one-to-one sessions.

PAID Group Tutoring
* *I don't really recommend any tutoring agency. I think you can pick it up yourself or with the free help available (the SI, the IA, the 215 HELD help desk, the tutor zones, my office hours, the sample exams, and reviews movies!). I think the problem with these tutoring agencies is that they teach: 1) methods other than what I do, so students get confused and remember about 1/2 of each so mess up the exams and 2) shortcuts that only work in certain circumstances, so students miss it when I give questions. Use the free tutoring if possible! See me during office hours for ideas.

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You will have 7 sets of homework assignments, worth 10 pts each. Approximately 2 weeks of homework equals to one set.. When you miss a problem your online homework will show you how to work it or give you hints about how to work it. Then you will be given a similar, but different problem on your next attempt. You will have 10 attempts to get the problems correct.

**The due dates/times for your homework are in MindTap. In the syllabus, you see the dates that say "HWK Set #1 ENDS" This means that all of the homework from the beginning of the semester through that point will make up Homework set #1. If you get 95% of the points on this set, you will receive 10 course points. There will be 7 sets of homework.

Only the graded assignments MUST be done. The others are for your study (practice). You only need to do the required number of questions (e.g., 2 of 3). No extra credit for doing 3 of 3.

No difference in credit by attempts. You get the same credit if you complete the assignments on the first try or on the 8th try. No deductions for the number of tries it takes you to get to the required number of questions. Scroll to see all assignments in MindTap when in the weekly view

Using MindTap (some call it OWLbook or the Young,Vining book): Credit is given for the number of assignments (tutor questions and interactive questions) and mastery exercises that are mastered by the due date. You will be asked to do the Reviews as a chapter mini-exam. Things like the Challenge, and Study Guide are for your practice, along with another copy of the Review. I recommend these for study AFTER we have finished a chapter.

So if you master all that are assigned, you should receive full credit (10 homework points). The total possible is the addition of the numbers for all graded assignments. For each set, if you did all or at least 95% you will get 10 pts. If you get 90% of them, you will get 9 pts, 80% = 8pts, 70% = 7 pts, 60% = 6 pts, 50% = 5pt, 40% = 4 pts, below 40% = 0 pts.

**YOU MUST USE to buy your homework/textbook system to get the TAMU prices. This deal will ONLY be available from our TAMU link. The publisher offers a 14-day free trial that can be used until you purchase your access code. If you want to take this option, see under To Register below.

**To Register: You can click on You will click on our course "General Chemistry 120'. Next Click on 'Register" where you will be asked to sign into your Cengage account or to set up an accoun using your TAMU email. Once registered into the course and see the "My Home" page and have your free 14 day trial. This is a movie showing how to register is:

**To Purchase: DO NOT HIT THE REVIEW PURCHASE OPTIONS on your 'My Home" page, AS YOU WILL NOT GET THE TAMU PRICE!! INSTEAD go back to then click "Purchase MindTap only" to see the options. Here you will be asked IF you have first registered, click 'yes", then you will see a number of options. The best option is for $45 for 6 months, that is without a hard-copy of the book. You really won’t need the print book. The homework system is really embedded in the book, such that you read a short section of the book, then have questions right below it for most of the assignments….. so unlike some homework systems the text and the question are in the same screen. Again, a number of my past students didn’t really want a print book. BUT option labelled as "epack" for $65.00 for 6-months includes a hard-copy of the textbook, and they will mail it to you. If it is backordered, they will mail it to you when it is ready. Even with if the hardcopy is back-ordered, you will get into the electronic parts immediately. You should NOT need the $85 version, as they are good for 24 months. One is just digital and the epack version includes a hard-copy of the book. The all digital $45 version is fine!!!

If you purchased an access code with a book from a bookstore, you will choose 'Review Purchase Options" from 'My Home' and click on the 'Enter access code' link under the textbook. enter the access code that will be on a card inside the book.

You may also want to purchase Cengage Unlimited, if you have 2 or more courses with a Cengage book. It is 119.99 per semester for unlimited products. For this option, use this course key to add our course: MTPP5M8QSXC4

Use this website to login AFTER YOU ARE REGISTERED in the course: NOT from Canvas! Canvas is too new and may be down!

NEED MORE HELP TO REGISTER OR PURCHASE? SEE THE TAMU student support website with daily office hours:

**We don’t use the overall percentage in MindTap SO… the percent in the circle in MindTap doesn’t matter. I often only require a certain number of those possible, so everyone’s percent in the circle will go down. Do all unless it is clearly marked for you to do less than required by the system. For the homework assignments, we sum the points you earned and divide by the total possible, then multiply by 100 to get the percentage for that 2-week homework set. SO… the percent in the circle in MindTap doesn’t matter.


**There are reported issues with MindTap and Chrome. If you have any difficulties with the homework, switch browsers to Firefox.

**For number 11 on the Chemdoodle Sketcher: First draw toluene, which is the alternating double bonds 6 sided structure with CH3 hooked to it. THEN click on the down arrow next to the circle with a plus in it. This will expand into a menu with the Rx tool. click on the Rx tool, then You want to hover over the C in the CH3 and an input box will come up. add a 1 in the box and click done. The CH3 should change to R1, then submit answer!

**On assignment 10.4 Mastery II, you need to draw 2 of a species if there is a coefficient of 2, like 2 CO; so you will need 2 boxes where you draw CO in each.

**on 19.4a, the tutored problem 19.4.1, I will not ask you to give the K for multiple equations. If you do the other parts correctly, you will get 0.8 pts out of 1pt. 19.4a is worth 2 points, you can do the first question, so 1.8 out of 2 pts will be required for 19.4a

**19 Review On question #8, you will need to do calculations. Solve for x to compare molar solubilities for compounds with different stoichiometry, even though the problem says without calculations!

**On 21.3a, If the image does not appear, then change browsers (firefox perhaps). Chrome has some problems with this image.

** ON 21.1e for the cell notation: Make the single and double lines by using the key above the return key on the right side of the key board. The lowercase is \, while the uppercase is | Do two of the uppercase to get the double line.

**ON 21.1 M question #4 wants the 1/2 equations BEFORE you multiply to get the electrons the same number.

**Assignment 21.3 Mastery, for the 3rd group of questions: Only 1 question will be required NOT 2. For your exam 4, do the one that just says a 1M solution or just a solution- this will NOT require the Nernst Equation.

**ON 21.2a for the second question (tutored problem 21.2.1) students are having questions about c and d. There is a long explanation under Frequently Asked Questions, then at the bottom of electrochemical section.

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The full set of learning objectives is in your syllabus.

For the objectives and homework for Exam 1, click here!
For the objectives and homework for Exam 2, click here!
For the objectives and homework for Exam 3, click here!
For the objectives and homework for Exam 4, click here! 

You will need acrobat reader to see and print these.  These are the same as those passed out in class. If you need acrobat reader click .

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Click here for the syllabus and calendar in pdf. This is also on HOWDY and was emailed to you! Ck the syllabus for your clicker and calculator needs.

You will need acrobat reader to see and print these. If you need acrobat reader click here

**Students cannot use calculators that are programmable or have alpha-numeric capabilities for the exams. This means no TI-eighty anything. You CAN NOT use a TI-83 since it has alphabetic memory. You need a TI 30 or 36 or its Casio equilivent. The calculator cannot have alphabetic memory. It should cost $9-15. Be sure to buy one with the keystrokes you like. For example: TI-83 require that you put in log then the number. If you want this same keystroke for your lower calculator, then at the store, hit the log button. If the calculator gives you an error, this calculator will require that you put in the number, then hit log. If the calculator says log and is ready for the number, this calculator has the same keystrokes as your TI-8X.

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**If you missed an exam and need to sign up for the makeup exam, see or e-mail me. Makeups are granted for university reasons (or VERY good ones). Otherwise, the missed exam is the one you will replace with the final percentage.

** Remember that your final percentage can replace your lowest hourly exam, but you don't want two low exams 1 bad exam is not a problem, but you must do well on the remaining

*Remember that your clicker, homework, Mini-Exams, and task pts should be at or near 100% on. IF you are doing these, you can make a little lower on exams than the letter grade you want in the course. For example if your exam average is around 68, then your points for clicker, homework, mini-exams, and tasks will bring up your course grade to a C (if you have all of these points).

**When it is available, download the grade calculator in the grades section below.

**Why is the exam average important???There is no extra credit. I don't curve, but will lower the points required for each grade at the end of the semester, based to a large part on the averages on the exams. Use the average to let you know both how you are doing compared to the class and how the class is doing. also remember that your exam grades can be a little lower than you want for the course, since your tasks (25 pts), clicker course points (30 pts), mini-exams (90), and homework (84 pts) are 250 points, so more than two test grades, for which you should get close to 100, in addition to the 1 exam grade that you can drop.

**Not happy with your Exam grade? Here are things that have helped students in the past:

**To study for the exam: 
1) do the two sample exams for each of the 4 old exams,
2) look over the study guides and practice on the MindTap reviews on the appropriate chapters,
3) go over your objective sheet,
4) practice any objectives that you are weak on by doing more problems on that topic (using the reviews and study guides for each chapter)
5) Do a quick read of the sections that are stated on your objective sheet for the objectives you are weak on.
6) Finally, go over the sample exams again, this time read the question and say HOW to work the problem, then uncover your answer and see if you know how to work the problem by reading it.
7) Then get a good night's sleep!!



Exam I = xx/100 pts for the total exam for all classes. Congrats to the 81 perfect scores and 85 others with 90% or better (so166 A's +97 B's +45 C's +52 D's)!! Remember that the percentage you make on the final can replace your lowest exam, if it is higher.

  Most missed (less than 50% correct): Poorly done (59-50% correct):
For 2:55



For 4:15

1. same

1. same

Exam II= xxx pts/100 pts for the total exam. Congrats to the 44 perfect scores and the 62 more will 90% or better on the full exam (On the total exam: 106A's + 62 B's + 50 C's + 71 D's!!). Remember that the percentage you make on the final can replace your lowest exam, if it is higher.

  Most missed (less than 50% correct): Poorly done (59-50% correct):
For 2:55




For 4:15

1. same

1. same

Exam III = xx pts/100 pts for the total exam. Congrats to the 64 perfect scores on the exam and the 40 more will 90% or better on the full exam (On the total exam: 104A's + 74 B's + 57 C's + 47 D's).

  Most missed (less than 50% correct): Poorly done (59-50% correct):
For 2:55

1. .


For 4:15

1. same

1. same

Exam IV = xx pts/100 pts for the total exam. Congrats to the 80 perfect scores and the 50 others with 90% or better (130 A's, 40B's, 36 C's, 48 D's)

  Most missed (less than 50% correct): Poorly done (59-50% correct):
For 2:55



For 4:15 1. same

1. same

FINAL = xx/100 pts Congrats to the xx with perfect scores and xx others with 90% or better (so xxA's, xx B's, xx C's, xx D's )!!

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You will need an iclicker app. For the iclicker app: If you do not already have an iclicker reef account, you can create one for free. You can do this by downloading and opening the iclicker reef mobile app via the App Store or Goggle Play or by visiting and creating an account as a student. You have a 2-week trial account. After that you have to purchase a subscription (link is in the syllabus).

We will use the iclicker every class period, BUT it will be the second week or so until we begin counting it for a grade! This is also linked on ecampus. WHEN YOU REGISTER YOUR CLICKERS, USE YOUR TAMU UIN!

**Chem 120 has two parts: 3/4 of the grade is from the lecture course, while 1/4 is from the lab course.  The lab will be taught by a Teaching Assistant (a TA).  Dr. Lee and Dr. Songok are the lab coordinators, in charge of TAs, curriculum, and grades. Contact Dr. Lee or Dr. Songok about lab issues. and . You should also go to the lab website. Here are the Lab Announcements that I have been given:

9/20 to 9/24

Colligative Properties
-SmartWorksheet due at 1 am the night before your lab
-Lab notebook should be submitted to Gradescope

-Prelab Quiz due at 1 am the night before your lab session
- Lab notebook should be prepared before lab session

9/13 to 9/17 Colligative Properties
-Prelab Quiz due at 1 am the night before your lab
-Lab notebook should be prepared before lab session
-Please dress lab-appropriate and have your goggles
9/6 to 9/10

Safety and Lab Notebooks:
- Bring a dedicated notebook (composition or spiral-bound, at least 50 pages).
- Goggles are $5 and will be sold by PLU in Heldenfels Hall

**Dr. Kennicutt's website is available for students: and has good info for students.

**Wondering about the Zika Virus? Click here for a movie from the American Chemical Society that is straightforward

**Want to make your plain goggles colorful??  Click here for the instructions on how to dye  Get with friends to color a bunch at once!

** You can click complex molecules and see a 3D image of them

**Want to read about how scientists turn carbon dioxide into coal? Click here!!

** For more info on thermite. demonstration of thermite grenade cutting through steel.

**See this article about the benefits of taking notes by hand vs. keyboard:

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