Search found 59 matches
- Sun Dec 08, 2019 11:00 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 4
- Views: 430
Re: Final
You needed to draw the metal iron, which was Fe connecting to the CN molecule but showing how it connects, like which specific one (C or N) connects and why (due to charges).
- Sun Dec 08, 2019 10:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 14A FInal
- Replies: 6
- Views: 485
Re: 14A FInal
I was told the TA's had 4-5 days to grade them but not too sure...
- Sun Dec 08, 2019 10:56 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: OH- and H+
- Replies: 6
- Views: 532
Re: OH- and H+
I usually do the chemical rxn with water to tell.
- Sun Dec 08, 2019 10:55 pm
- Forum: Biological Examples
- Topic: Cisplatin [ENDORSED]
- Replies: 19
- Views: 1249
Re: Cisplatin [ENDORSED]
Cisplatin is the biologically active one whereas trans is not due to the better job cis does from bonding at tow G on DNA rather than 1.
- Sun Dec 08, 2019 10:52 pm
- Forum: Hybridization
- Topic: Pi bond
- Replies: 10
- Views: 738
Re: Pi bond
Yes they always exist in p orbitals only!
- Sat Dec 07, 2019 5:17 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: why is EDTA hexadentate?
- Replies: 1
- Views: 193
Re: why is EDTA hexadentate?
I am also confused about this. Also, how can the N atoms give up a lone pair? Wouldn't that make them only have 4 bonds which would result in 4 electrons when they should have 5? Can someone please explain.
Re: Chelating
jvera4b wrote:Liliana Aguas 3G wrote:What day of lecture notes was this topic mostly covered?
I believe November 20.
Thank you so much!
- Sun Dec 01, 2019 10:22 pm
- Forum: Bronsted Acids & Bases
- Topic: Naming
- Replies: 4
- Views: 329
Re: Naming
KSong_3C wrote:I think we do because it was one of our homework problems (9C.3)
Oh true, then it is likely that we will need to especially cause he did go over it in class.
- Sun Dec 01, 2019 10:21 pm
- Forum: Bronsted Acids & Bases
- Topic: Naming
- Replies: 4
- Views: 329
Re: Naming
When he was going over it in class it seemed like it but it'd be best to ask a ta to be sure.
Re: Chelating
What day of lecture notes was this topic mostly covered?
- Sun Dec 01, 2019 10:17 pm
- Forum: Bronsted Acids & Bases
- Topic: Final
- Replies: 13
- Views: 790
Re: Final
Yeah, it's pretty much all the topics in the outline he has, the information he has given during lecture, and homework problems.
- Sun Dec 01, 2019 10:14 pm
- Forum: Student Social/Study Group
- Topic: Week 10 Chemistry Community
- Replies: 9
- Views: 701
Re: Week 10 Chemistry Community
Yes, I had talked to my ta and it's the same time so Sunday. And there should be a total of 50 posts because we do 5 a week and there's 10 weeks. :)
- Sat Nov 23, 2019 11:08 pm
- Forum: Bond Lengths & Energies
- Topic: Boiling Points
- Replies: 3
- Views: 757
Re: Boiling Points
Yes exactly, because there's more electrons, there's more protons in the nucleus also so the mass is larger and that makes it a larger molecule. Because it's a larger molecule, the polarizability of it is greater, so there's a higher chance for fluctuability of its electrons around the orbitals so t...
- Sat Nov 23, 2019 11:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR and its relation to Hybridization
- Replies: 3
- Views: 209
Re: VSEPR and its relation to Hybridization
Yes, it'e because it's related to shape and because of the VSEPR you are able to determine if the molecule is nonpolar/ polar overall even if there is dipole moments which this contributes to how the molecule will react (form bonds) with other molecules and how many bonds at that which is where hybr...
- Sat Nov 23, 2019 11:02 pm
- Forum: Hybridization
- Topic: Sigma and Pi Bonds
- Replies: 7
- Views: 444
Re: Sigma and Pi Bonds
Yes, we should just know that and how they interact as mentioned above. And how to show their interaction on a molecule.
- Sat Nov 23, 2019 10:59 pm
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 334228
Re: Final Jitters
I always get really bad anxiety during test week to the point where I get sick and throw up or am constantly nauseous. Anyone have ideas for how to help while also being able to study? You could try meditating and planning little study breaks to look forward to. Also, try to think about tests in th...
- Sat Nov 23, 2019 10:56 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: T-shaped v. Trigonal pyramid
- Replies: 9
- Views: 516
Re: T-shaped v. Trigonal pyramid
Yes, I always like to draw the shape of the electron arrangement then cross of the most reasonable atoms (based on repulsion) and then that is usually how you get T-shape or trigonal pyramidal. It's easier when you have a visual.
- Sun Nov 17, 2019 11:32 pm
- Forum: Hybridization
- Topic: test 2
- Replies: 8
- Views: 453
Re: test 2
Yes, Lavelle said that hybridization is not on the test but sigma and pi bonds are. It's also not cumulative, so it's all the material after the midterm up to tomorrow (11/18) but not hybridization.
- Sun Nov 17, 2019 11:29 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E.11 Part B
- Replies: 2
- Views: 179
Re: 2E.11 Part B
Yes, you have to determine which to take off from the electron arrangement shape to get the least amount of repulsion for the molecule shape.
- Sun Nov 17, 2019 11:27 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining polarity 2E 25 pt d
- Replies: 2
- Views: 191
Re: Determining polarity 2E 25 pt d
Yes, exactly because the shape determines what direction the dipole moments are pointing toward and from there you can see if they cancel out or not.
- Wed Nov 13, 2019 9:33 pm
- Forum: Student Social/Study Group
- Topic: Test 2
- Replies: 7
- Views: 453
Re: Test 2
Also, will tests be in section again?
- Wed Nov 13, 2019 9:32 pm
- Forum: Student Social/Study Group
- Topic: Test 2
- Replies: 7
- Views: 453
Re: Test 2
I feel like the topic Coordination Compounds and their Biological Importance will not be on test 2, because if we just started the topic Molecular Shape and Structure then there might not be enough time for people to get a grasp of the topic before their tests as their sections might be early on in ...
- Wed Nov 13, 2019 6:52 pm
- Forum: Electronegativity
- Topic: Polar Molecules
- Replies: 4
- Views: 270
Re: Polar Molecules
Although molecules can have polar covalent bonds, there are a few exceptions where the dipole moments cancel each other out; thus, creating non-polar molecules that have polar bonds. Ex: CO 2 and CCl 4 While both C=O and C-Cl bonds are polar, the dipole moments cancel each other out due to their li...
- Sun Nov 10, 2019 11:42 pm
- Forum: Coordinate Covalent Bonds
- Topic: Electronegativity
- Replies: 12
- Views: 1685
Re: Electronegativity
Can someone explain how shielding works? I understand the concept as when there are more expanded shells of electrons the electrons are further away and the ones in the furthest shell are not pulled on as much, but is it the idea that the ones closer to the nucleus are "stealing" more of ...
- Sun Nov 10, 2019 11:40 pm
- Forum: Coordinate Covalent Bonds
- Topic: Electronegativity
- Replies: 12
- Views: 1685
Re: Electronegativity
It decreases as you go down the group because the attraction to the nucleus decreases so there is not as much of a pull as higher up.
- Sun Nov 10, 2019 11:36 pm
- Forum: Coordinate Covalent Bonds
- Topic: Coordinate vs polar covalent
- Replies: 10
- Views: 2408
Re: Coordinate vs polar covalent
Yes and the polar covalent bonds have partial charges attracting other oposite partial bonds.
- Sun Nov 10, 2019 11:34 pm
- Forum: Octet Exceptions
- Topic: Reasoning for Octet Exception
- Replies: 19
- Views: 1151
Re: Reasoning for Octet Exception
Only elements from period 3 and beyond can have expanded octets as they can fill up the empty d orbitals that follow higher in energy.
- Sun Nov 10, 2019 11:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent and Ionic Bonds
- Replies: 6
- Views: 311
Re: Covalent and Ionic Bonds
Yes it is easier to use the period trends and understand the concept behind it so you can be given any problem and have the best way to approach.
- Sun Nov 10, 2019 11:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 161103
Re: How to find my posts
Is there anyway to know how many times you posted or no? I post during the week and forget by the weekend how many times I have and when I go to see my posts if I posted in the same one twice it wont show me that.
- Sun Nov 10, 2019 11:29 pm
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 334228
Re: Final Jitters
I always get really bad anxiety during test week to the point where I get sick and throw up or am constantly nauseous. Anyone have ideas for how to help while also being able to study?
- Sun Nov 03, 2019 9:17 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 16
- Views: 669
Re: Midterm
When it says all the material up to 2D does that include 2.1, 2.7, 2.11, and 2.25 questions from chemical bonds homework?
- Sun Nov 03, 2019 7:25 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: isoelectronic definition
- Replies: 7
- Views: 231
Re: isoelectronic definition
It's when they have the same number of electrons and same electron configuration! Section 1F.3 explains it with some examples:) So two elements would have to have the same number of electrons as well which would then be the same electron configurations for both? Yes! Because when they have the same...
- Sun Nov 03, 2019 7:24 pm
- Forum: Lewis Structures
- Topic: lowest energy
- Replies: 5
- Views: 246
Re: lowest energy
I understand how to draw the structure with the lowest energy and that ir represents the lowest formal charge, but what does it mean to have lower energy? Like lower energy compared to what or for what? Why do you need the structure with the lowest energy?
- Sat Nov 02, 2019 9:31 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: isoelectronic definition
- Replies: 7
- Views: 231
Re: isoelectronic definition
It's when they have the same number of electrons and same electron configuration! Section 1F.3 explains it with some examples:)
- Wed Oct 30, 2019 11:04 pm
- Forum: Coordinate Covalent Bonds
- Topic: coordinate covalent bonds
- Replies: 3
- Views: 165
Re: coordinate covalent bonds
Yeah exactly what they said. Today he went over Boron as the example. So B completed its octet by F providing both of its electrons. Originally it was Boron Triflouride, BF3, but that only had 6 valence electrons. By adding another Flouride, B completes it octet to form tetraflouroborate anion BF4-,...
- Wed Oct 30, 2019 10:56 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm
- Replies: 28
- Views: 1213
Re: Midterm
Yeah, he clarified today in lecture that it would cover all the material up to Friday of this week because of the campus closure on Monday. So it's Fundamentals, Quantum, and up to 2D on chemical bonds. We're not gonna have all of chemical bonds covered.
- Wed Oct 30, 2019 10:52 pm
- Forum: Student Social/Study Group
- Topic: Need Notes
- Replies: 10
- Views: 673
Re: Need Notes
Hi, OMG thank you SO much but I don't need them anymore. But, I really appreciate it!!! Also, I have the notes and I can send the ones you need!!! Actually, take her notes! I can still send them but my writing is super messy hahaha hers are probably better HI! So sorry for getting back to you so la...
- Sun Oct 27, 2019 9:57 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006100
Re: Post All Chemistry Jokes Here
Have you heard the one about a chemist who was reading a book about helium?
He just couldn't put it down.
He just couldn't put it down.
- Sun Oct 27, 2019 9:51 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Questions
- Replies: 2
- Views: 76
Re: Midterm Questions
Yes, they pull like one or two but overall they are different problems but just similar to the homework questions.
- Sun Oct 27, 2019 9:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Study Tips!
- Replies: 7
- Views: 295
Re: Study Tips!
Yes, watching Khan Academy videos is helpful! Especially for this new section. Also, I really recommend going to the step up sessions. They really help me out.
- Sun Oct 27, 2019 9:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Overall Grades
- Replies: 1
- Views: 76
Re: Overall Grades
Also, there's no curve? Or if there is how does it work?
- Sun Oct 27, 2019 9:47 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 17524
Re: Test 1 [ENDORSED]
Ok, so only the midterm is cumulativa and the tests are just on new material we have not yet been tested on?
- Sun Oct 27, 2019 9:45 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 146979
Re: Reading the textbook
What do you guys recommend when reading the textbook? Because it can get really confusing and I don't understand what to take notes on. Also, should we read them before class and take notes or after lecture? I think we can read the textbook whenever we want. If you prefer to learn the topics on you...
- Sun Oct 20, 2019 11:18 pm
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 17
- Views: 818
Re: Midterm
Are you talking about the fundamentals from the topic review of high school material?
- Fri Oct 18, 2019 7:21 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006100
Re: Post All Chemistry Jokes Here
In spirit of the topic we're learning:))
What do you call quantums of electromagnetic radiation that don't get along?
...... Foe-tons
What do you call quantums of electromagnetic radiation that don't get along?
...... Foe-tons
- Fri Oct 18, 2019 7:16 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Advice for studying
- Replies: 92
- Views: 6501
Re: Advice for studying
I agree with what everyone is saying about the Step Up sessions!! They go step by step and it's really good because it sets the foundation of how to do it so then when you do the homework problems it makes you practice the idea.
- Fri Oct 18, 2019 7:06 pm
- Forum: Student Social/Study Group
- Topic: Need Notes
- Replies: 10
- Views: 673
Re: Need Notes
Hi, last Wednesday I had a job interview and had to leave early so I did't get a chance to get the notes down. If anyone can please send them that would be AMAZING and I would greatly appreciate it :) **Also, if anyone needs any other notes post here!! HI! I have notes from that lecture! If you can...
- Wed Oct 16, 2019 7:58 pm
- Forum: Student Social/Study Group
- Topic: Need Notes
- Replies: 10
- Views: 673
Need Notes
Hi, last Wednesday I had a job interview and had to leave early so I did't get a chance to get the notes down. If anyone can please send them that would be AMAZING and I would greatly appreciate it :)
**Also, if anyone needs any other notes post here!!
**Also, if anyone needs any other notes post here!!
- Sun Oct 13, 2019 11:19 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006100
Re: Post All Chemistry Jokes Here
Ok my last one was actually corny(hehe) so here's another:
Want to hear a joke about sodium, bromine, and oxygen???
NaBrO
Want to hear a joke about sodium, bromine, and oxygen???
NaBrO
- Sun Oct 13, 2019 11:18 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006100
Re: Post All Chemistry Jokes Here
Did you hear the one about cobalt, radon, and yttrium?????????????????????
It was CoRnY.................. LOL
It was CoRnY.................. LOL
- Sun Oct 13, 2019 11:16 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 146979
Re: Reading the textbook
What do you guys recommend when reading the textbook? Because it can get really confusing and I don't understand what to take notes on. Also, should we read them before class and take notes or after lecture?
- Sun Oct 13, 2019 11:12 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 17524
Re: Test 1 [ENDORSED]
Does anyone know when test scores will be out?
- Sun Oct 13, 2019 11:09 pm
- Forum: Student Social/Study Group
- Topic: Curve?
- Replies: 50
- Views: 6026
Re: Curve?
Yes, it is all just based on the class average so technically there is no curve.
- Thu Oct 03, 2019 9:53 pm
- Forum: SI Units, Unit Conversions
- Topic: Knowing Units
- Replies: 7
- Views: 366
Re: Knowing Units
cnguyen1k wrote:There's a lot of youtube videos and resources that you can use to memorize the conversions. :)
Okay yeah I'm going to have to look into that lol.
- Thu Oct 03, 2019 9:50 pm
- Forum: SI Units, Unit Conversions
- Topic: Discussion Credit
- Replies: 7
- Views: 387
Re: Discussion Credit
Does attending discussion weekly count as part of discussion credit? It doesn't seem mandatory to attend but after week one, homework will be turned in during discussion so if you're not there then you can't turn it in. However, my friend who's also in the class said her Ta told her she can attend ...
- Thu Oct 03, 2019 9:47 pm
- Forum: SI Units, Unit Conversions
- Topic: Knowing Units
- Replies: 7
- Views: 366
Re: Knowing Units
cnguyen1k wrote:Yes I think you're going to have to know the unit conversions but it becomes easier with practice.
Okay, I just wasn't sure if we had to for tests, but thank you.
- Thu Oct 03, 2019 9:44 pm
- Forum: SI Units, Unit Conversions
- Topic: Knowing Units
- Replies: 7
- Views: 366
Knowing Units
Are we going to have to memorize the exact units for conversion. For example, in the homework E1, I converted pm to m and it was 1m/1*10^-12pm but am I expected to know that there are 1*10^-12 pm for every mole?
- Thu Oct 03, 2019 9:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3006100
Re: Post All Chemistry Jokes Here
What kind of dogs do chemists have?
...... laboratory retrievers......
...... laboratory retrievers......
- Thu Oct 03, 2019 9:34 pm
- Forum: SI Units, Unit Conversions
- Topic: Homework for Week 1
- Replies: 16
- Views: 811
Re: Homework for Week 1
Yes, the community discussion questions are due on Sunday and NOT in lecture.