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=Welcome to the Chem 2046 Wiki!=

I will be posting files here until we can get Blackboard up and running!

Please use this lab as our Take Home Freezing Point Depression Lab. You will do this paper lab instead of the in-class lab in your lab manual. It will be due on Thursday, July 7th in class.



Also, please remember that our first exam is on Thursday, July 7th!!! Also due that day: Freezing Point Lab and Ch 14 Homework

Please post your lessons for chapter 14 no later than midnight Friday night/Sat morning: 14.7: Hector 14.9: Aaron 14.10&14.12: Jimmy 14.13&14.15: Tyson and Mark 14.14: Brittani Please post your peer reviews of the lessons no later than midnight Sunday night/Monday morning: 14.7: Brittani 14.8: Hector 14.9: Erin and Ashley 14.10&14.12: Aaron 14.13&14.15: Jimmy 14.14: Tyson & Mark PLEASE NOTE THE SHIFT IN REVIEWS DUE TO ADDING 14.14
 * 14.8**: Erin and Ashley [|Page_1_of_2.jpg] [|Page_2_of_2.jpg]

It looks like some people didn't see how to make their files visible here, and it confused some people. I will give an extension until 10pm on Tuesday for those who didn't see the files they were supposed to edit. There will be 5 extra credit points for those who figured it out and got it in on our original schedule.

Your quiz answers are due by email to me at rblack@fscj.edu by midnight Sunday night/Monday morning as well. An answer key will be posted Monday morning, and no quiz answers will be accepted after that time.


 * QUIZ 3 ANSWERS:** any quizzes received after this time (9am EST) will not be accepted. [[file:Quiz 3 Key- Ch 14- Acid Base.docx]]

=** REMINDER: EXAM 1 IS TODAY -- THURS JULY 7TH! **= You will have 90 minutes to complete the exam, then we will take a break and do the Iodine Clock Lab. You will have a page of equations and constants, as well as a periodic table. In the future exams will be on Tuesdays so that you can leave as soon as you're done with the exam. Also, please remember to bring your labs and your homework to turn in in class!

7/9: I have finished grading the exams, and the average was a 67, with a few high scores (>80), a few lows (<40), and a few right around the average (50-70). Remember that even the average score of 67 is a C, and with the the potential to become an 83, which is a very high B... almost an A. I will be returning the exams on Tuesday, and you will have until Thursday to do the rework. We'll go over the rules for reworks again on Tuesday. Also due on Tuesday is the Iodine Clock lab... no homework or quiz this Tuesday! Have a good weekend!

7/20: Here is the description of the final assignment:

7/21: I will be handing out the quiz today in class. It will be due by email to me at rblack@fscj.edu by midnight on Sunday (Sunday night/Monday morning). I will post an answer key here on Monday morning so you can use it to study for the exam. Late quizzes will not be accepted since the answer key will be published. Here is a copy in case you can't make it to class today, or you lose your copy. TYPE-O ALERT: NH3NO3 SHOULD BE NH4NO3... SORRY! Also, since your book doesn't list an entropy for PCl5(s), calculate the deltaS's for the reactions with negative deltaS in question #2, and calculate the temperature at equilibrium for reaction D.

7/24: Here is a copy of the answer key for Quiz 4... I can't get my scanner to cooperate, so I took a photo. Hopefully it works for you all! I can post a word document with just the answers if it's giving people problems. ERROR ON ANSWER KEY: #1 should be C&D (since Kb for C5H5N is larger than Ka for HCN, solution is basic); #5 should be A (6.4E-5 > Ksp, not <Ksp! doh!)

7/25: Here is the answer key for Quiz 5. No submissions will be accepted after this time (8:45am EST) REMEMBER: EXAM 2 IS ON TUESDAY, COVERING CHAPTERS 15 & 16!

CHAPTER ASSIGNMENTS FOR THE FINAL PROJECT: CHAP 17A HW: 40, 42, 44, 46, 52, 54, 56, 60, 62, 66 7/29: Here is Quiz 6. Turn it in on paper on Tuesday in class These are the instructions I'd like you to use when writing your formal lab report. Since the procedure was so long for this lab, you may say that the test was done "according to the Chem 2046 lab manual", noting any deviations (like, "using 12 drops of 1M HCl instead of 2 drops of 6M HCl"). A title page is not required, but please put a title and your name in your Header. The lab report should be typed, and will be due on Tuesday 8/9. I would like you to use your lab manual, your book, wikipedia, and your chemistry knowledge to try to figure out why/how each test works. (For example, what is the white precipitate that signifies a positive test? What is the reaction equation that describes the unknown plus the test reagent forming that test result?) And also, in the conclusion, I would like you to say which metals you had in your sample. You can't determine from our tests what the anion in the compounds are, just the metal cations. You should also attach a copy of your lab notebook pages that show your work over the two lab days. These should be attached at the end of the lab report. If you have any questions, feel free to email me or ask in class! The typewritten portion of the lab report will probably take 3-5 pages. But length is less important to me than making sure you have all of the info requested.
 * Ashley&Erin || 10&11 ||
 * Ashley&Erin || 12 ||
 * Hector || 13 ||
 * Aaron || 14 ||
 * Mark || 15 ||
 * Brittani&Tyson || 16 ||
 * Jimmy || 17 ||
 * Tyson&Brittani || 18&20 ||

8/5: Nice job on your reworks guys! Nice to see the average come up to 79... better than last test, and this one was pretty tough! REMEMBER: formal lab reports, homework, and quiz 7 are all due on Tuesday. A little humor from Chemistry Cat while you work on your formal lab report...

8/9: SYLLABUS GRADING UPDATES AND OTHER INFO: ASSIGNMENTS: The syllabus says that assignments will total 135 points; 5 points for each homework, plus 5 per worksheet, and then the final project. We ended up with 2 worksheets (10 pts total), 11 homework assignments (55 pts total), plus the work that you did for chapter 14 (I considered this 2 worksheets worth 10 pts total: 5 for your section, 5 for your peer review), and the final project (worth 60 pts). EXAMS:
 * Exam 3 is next Tuesday. I will grade it, and get it back to you on the review presentation day on Thursday. You will bring your reworks to the final exam.
 * You will not have a rework for the final, but you will be allowed one side of one page of notes on the final

8/11: Here is Quiz 8, due Tues 8/16: Exam 3 day!

8/18: The average on the test was a 75... great job everyone!!! Here is the final handout: Also, here is the powerpoint for Ch 13: I'll see you this afternoon for our Final Review presentations, and our last lab!

8/19: It seems that there has been some confusion on determining unpaired electrons in a coordination compound. The original hybridization model provided in the chapter is incomplete, as it doesn't take into account crystal field splitting. This is illustrated in the difference between the low spin and high spin octahedral compounds. To determine if something is dia or paramagnetic, you need to first consider the crystal field splitting for that geometry, and then fill in the metal's d electrons. Since the ligand electrons come in in pairs, the orbitals occupied by a single electron remain partially filled. Only the empty orbitals can accept a pair of electrons from the ligand to form the coordinate covalent bond. We introduced the valence bond theory not as a tool to be used, but as a way to show the need to use crystal field theory. I'm sorry if this created any confusion. Even if you do not understand why the splitting occurs (i know, it's a pretty advanced concept), you should at least use the given crystal field splitting patterns to fill in your d electrons to determine the number of unpaired electrons, and therefore whether the compound is dia or paramagnetic.

8/22: I wasn't able to get a copy of the standardized exam I wanted, so I'll be writing my own final. See you tomorrow evening!

8/23: The final is written! It is 6 pages, including a 10 point extra credit question. You will have 2 hours to complete it. It doesn't have any evil multiple choice questions. :) See you tonight at 7:45! Please be on time so that we can finish at a decent hour. Don't forget to bring your Exam 3 rework, Quiz 9, the Titration lab, and any late work you want to turn in. It has been a pleasure getting to know all of you this summer! Feel free to hold onto my home email address and contact me in the fall for help with OChem if you need it.

FINAL GRADE SHEET!!!! If you have any questions about any of the grades, please let me know!