Search found 67 matches
- Sat Dec 07, 2019 12:13 am
- Forum: Lewis Acids & Bases
- Topic: Stronger Base and Stronger Acid
- Replies: 3
- Views: 250
Stronger Base and Stronger Acid
How do you identify which base is stronger or which acid is stronger when given two bases/acids?
- Wed Dec 04, 2019 2:17 am
- Forum: Administrative Questions and Class Announcements
- Topic: Grade points
- Replies: 1
- Views: 195
Grade points
Does anyone know roughly how many points are needed for grades above C-? Like what is needed for C, C+, B-, B, B+, A-, A, and A+?
- Wed Dec 04, 2019 2:01 am
- Forum: Naming
- Topic: Tips on Naming
- Replies: 5
- Views: 392
Tips on Naming
Whenever I look at the chemical names given in the homework problems, they always overwhelm me! Can someone please give me some tips on how to easily name chemicals such as the ones in problems like 9C.1 and 9C.3
- Mon Dec 02, 2019 7:37 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Studying for the Final [ENDORSED]
- Replies: 11
- Views: 717
Re: Studying for the Final [ENDORSED]
Review the problems you got marked off on from the midterm, do the homework problems for concepts you don't quite understand (I would recommend to do all to really expose yourself to many test question possibilities), and do the activities on SaplingLearning Plus
- Mon Dec 02, 2019 7:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam
- Replies: 3
- Views: 325
Re: Final Exam
I agree with Alex. So, I think it would be helpful to study the newer material as well as material that Lavelle withheld from the midterm, such as Heisenberg uncertainty.
- Mon Dec 02, 2019 7:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Past exams
- Replies: 7
- Views: 670
Re: Past exams
I'm almost 99% sure that the Test Bank isn't allowed to take Lavelle's tests. Thus, there would be no previous exams for this class there. I think the best legal option is to do Lyndon's Marshmallow review since they're inspired on previous test questions. But, the illegal option is to probably ask ...
- Mon Dec 02, 2019 7:30 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final tips
- Replies: 19
- Views: 1008
Re: Final tips
I'd say definitely go over the midterm solutions (especially problems you got marked off), this will give you an idea of what test concepts you didn't quite understand! Also, you should study the concepts we didn't cover in the midterm, because I lowkey feel like Dr. Lavelle is the type of professor...
- Mon Dec 02, 2019 7:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Difficulty
- Replies: 14
- Views: 824
Re: Difficulty
I think there is an obvious higher level of difficulty for students who haven't taken AP Chemistry. This class has me beyond stressed compared to my other classes! However, I make this assumption loosely based on my experience in my calculus class I'm also taking this quarter. My experience in that ...
- Thu Nov 21, 2019 9:47 pm
- Forum: Student Social/Study Group
- Topic: Any tips on how to catch up in this class?
- Replies: 16
- Views: 920
Re: Any tips on how to catch up in this class?
Honestly, whenever I read the textbook I get more confused! So I'd honestly just recommend working out every assigned homework problem in the Outlines on Lavelle's website. Also, for each problem it's important to understand how to solve those problems, why certain equations are used, and the genera...
- Wed Nov 20, 2019 10:58 pm
- Forum: Dipole Moments
- Topic: Polar or Nonpolar
- Replies: 5
- Views: 448
Polar or Nonpolar
How exactly do you determine if a molecule is polar or nonpolar? I understand it mainly regards to dipoles canceling out or not, but can anybody elucidate this concept, I'm not quite fully understanding. Thanks!
- Wed Nov 20, 2019 10:56 pm
- Forum: Dipole Moments
- Topic: Intermolecular Forces
- Replies: 7
- Views: 444
Intermolecular Forces
Hi, I'm still a bit confused about how you know which intermolecular forces are involved given just the chemical formula. Can someone explain this to me? (For reference, I'm talking in regards to problems like 3F.1 and 3F.2)
- Tue Nov 19, 2019 7:06 pm
- Forum: General Science Questions
- Topic: Test 2 Review
- Replies: 8
- Views: 597
Re: Test 2 Review
3F.4-3F.5, also the topics on Lavelle's Outline 4: Molecular Shape and Structure, that doesn't include hybridization (up to sigma/pi bonds).
- Tue Nov 19, 2019 7:04 pm
- Forum: General Science Questions
- Topic: Chemistry Community Questions
- Replies: 5
- Views: 401
Re: Chemistry Community Questions
That's what I was wondering too! Like I kept up with the 5 questions a week, but how is this monitored?
- Tue Nov 19, 2019 6:58 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 2
- Replies: 2
- Views: 286
Re: Test 2
I believe it's very possible that we'll be asked to reproduce the A-X-E notation, especially since Lavelle writes it out almost each time he does an example in lecture!
- Tue Nov 19, 2019 6:56 pm
- Forum: Hybridization
- Topic: 2.57
- Replies: 2
- Views: 220
Re: 2.57
I don't have an answer but WOW that's crazy how it just skipped it and it isn't part of Lavelle's solution manual error resource on his website! Nice catch lol
- Tue Nov 19, 2019 6:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Memorization of Molecular Shapes
- Replies: 1
- Views: 195
Memorization of Molecular Shapes
When it comes to molecular shapes and shapes with the presence of lone pairs, does anyone have helpful pneumonics or techniques to memorize the many shapes?
- Sat Nov 16, 2019 11:36 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 299
Re: Bond Angles
What I noted is that you should be able to tell when the bond angles are less than the expected (i.e. less than 109.5 deg in the example you give), but it is also helpful to be able to rank them when comparing various shapes, such as the bond angles on a molecule with one lone pair against a molecu...
- Sat Nov 16, 2019 11:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 299
Bond Angles
I might have missed when he said it, but did Lavelle specify if we're allowed to just write that bond angles in the presence of a lone pair are just less than their normal measure? For instance, a tetrahedral with two lone pairs, can we just write the bond angles as less than 109.5 degrees? Or would...
- Sat Nov 16, 2019 11:12 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Studying
- Replies: 14
- Views: 861
Re: Final Studying
As this class progresses, I'm seeing more and more students succeed depending on the homework problems they expose themselves to. So for the final, I plan to work on many different problems! Also, something that gave me trouble (among many others) during the midterm, were solving problems given only...
- Sat Nov 16, 2019 11:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Conceptual/Calculation Questions
- Replies: 1
- Views: 158
Conceptual/Calculation Questions
Does anybody know if Test 2 will resemble the midterm or the first test more? I know Lavelle said that the midterm and tests subsequent to it will be significantly harder, but I'm wondering more in terms of test 2 having conceptual questions that pair with calculation based questions like the midter...
- Sat Nov 16, 2019 10:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Second Discussion Test
- Replies: 9
- Views: 515
Re: Second Discussion Test
Kendra Barreras 3E wrote:So for the 2nd test there will only be material from after the midterm?
Sorry, I am just seeing this reply but yes, the Test 2 is only on material after the midterm and the dipole interactions Lavelle taught right before our midterm.
- Sun Nov 10, 2019 1:47 am
- Forum: Administrative Questions and Class Announcements
- Topic: Commuters
- Replies: 3
- Views: 180
Commuters
As a commuter, I’m finding it pretty hard to really prepare for tests in this course (as it’s very difficult for me to attend review sessions/office hours with my schedule). I know this is very dependent on when I’m available, but do any of you commuters out there have any general advice to spare? A...
- Sun Nov 10, 2019 1:37 am
- Forum: Photoelectric Effect
- Topic: Wavelength from Work Function
- Replies: 1
- Views: 282
Wavelength from Work Function
Hypothetically, if a chemistry test in this class had a problem where you had to find the wavelength from just the provided work function value, what would you do? This TOTALLY didn’t give me a hard time on a chem test or anything hahaha jk...unless?
- Sun Nov 10, 2019 1:33 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Electron Transitions
- Replies: 2
- Views: 251
Re: Electron Transitions
*By the way, I mean a problem like that in general, I’m not asking for the specific answer from the midterm... lol I feel like it’s illegal to talk about the test answers. #APExamVibez
- Sun Nov 10, 2019 1:30 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Electron Transitions
- Replies: 2
- Views: 251
Electron Transitions
Hi, On the midterm, there was a question asking about the excitement of an atom to a different principle quantum number. And I was just wondering if anyone could please walk me through the equation used to find an answer for a problem like that and what steps we’d take to find the solution. This pro...
- Sun Nov 10, 2019 1:25 am
- Forum: Administrative Questions and Class Announcements
- Topic: Second Discussion Test
- Replies: 9
- Views: 515
Re: Second Discussion Test
Also, does anyone know when the test will take place?
- Sun Nov 10, 2019 1:25 am
- Forum: Administrative Questions and Class Announcements
- Topic: Second Discussion Test
- Replies: 9
- Views: 515
Second Discussion Test
Does anyone know what the next test in our discussion sections will cover?
- Wed Nov 06, 2019 12:04 am
- Forum: Dipole Moments
- Topic: Dipole, midterm?
- Replies: 7
- Views: 459
Re: Dipole, midterm?
Dipoles are not on the midterm as they are apart of the 3F unit, and our midterm is only cumulative of units up to 2D.
- Sun Nov 03, 2019 2:04 am
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Format
- Replies: 4
- Views: 223
Midterm Format
Is the midterm going to be all free-response problems using calculations or will there be other types like multiple choice, true/false, etc.?
- Sat Nov 02, 2019 11:00 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Calculator Issues!
- Replies: 3
- Views: 337
Calculator Issues!
Hi, I have been practicing a lot of problems lately and I realized that whenever I calculate things like the Heisenberg uncertainty equation, I always get the wrong answer using my TI-30XIIS calculator. My calculator is set to SCI and DEG, yet I still get answers incorrect! However, when I check my ...
- Sat Nov 02, 2019 9:56 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Equations we need for midterm
- Replies: 7
- Views: 615
Re: Equations we need for midterm
I believe 1D.3 is not a part of our recommended homework problems. Thus, we will not be expected to reproduce problems outside of the recommended homework problems and what Dr. Lavelle covers in lecture. I hope this helps.
- Sat Nov 02, 2019 12:28 am
- Forum: Administrative Questions and Class Announcements
- Topic: Active Topics
- Replies: 1
- Views: 54
Active Topics
Just to clarify, the topics with an asterick (*) such as Particle in Box, Black Body, etc. are not going to be tested, correct?
- Fri Nov 01, 2019 11:42 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg Equation
- Replies: 2
- Views: 104
Rydberg Equation
This might be a silly question but which equation did Dr. Lavelle prefer us to use instead of the Rydberg? I want to know which to study. Thanks
- Fri Nov 01, 2019 11:30 pm
- Forum: Properties of Light
- Topic: Wavelengths
- Replies: 2
- Views: 131
Wavelengths
Does anybody know if we're gonna be expected to know the specific wavelengths in nm for the midterm? Like for example, we're given a problem to solve for the wavelength then we have to say which type of radiation it is or maybe even which color the wavelength represents?
- Fri Nov 01, 2019 10:49 pm
- Forum: Trends in The Periodic Table
- Topic: Periodic Table & Formulas
- Replies: 2
- Views: 70
Periodic Table & Formulas
Hi,
Does anybody know if we get the same exact list of constants/equations, and the same periodic table for every test we take? I've been practicing with the copies given during Test 1 and I want to know if it'll be the same!
Does anybody know if we get the same exact list of constants/equations, and the same periodic table for every test we take? I've been practicing with the copies given during Test 1 and I want to know if it'll be the same!
- Fri Nov 01, 2019 10:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling Learning
- Replies: 3
- Views: 137
Re: Sapling Learning
Hey! I got an email about it, but it made it seem like everyone needs to trade in the code sleeve at the UCLA store? Do you know if this only applies to the people that SaplingLearning doesn't work for? Or should we all be trading in the code sleeve because SaplingLearning will be inactive after Oc...
- Tue Oct 29, 2019 10:46 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 7
- Views: 415
Re: Midterm
Midterm is November 6th and I believe we are being assorted into specific classrooms depending on lecture and last name. Don't forget to bring typical materials for testing and an ID!
- Tue Oct 29, 2019 10:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Topics
- Replies: 3
- Views: 204
Re: Midterm Topics
Everything from outline 1 to outline 3! Unless there were any changes due to our one cancelled lecture!
- Tue Oct 29, 2019 10:39 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm
- Replies: 10
- Views: 478
Re: Midterm
Blue books are not needed for the midterm.
- Tue Oct 29, 2019 10:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 16
- Views: 671
Re: Midterm
I believe everything up to the topics covered in Outline 3.
- Tue Oct 29, 2019 10:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling Learning
- Replies: 3
- Views: 137
Re: Sapling Learning
Hey! I got an email about it, but it made it seem like everyone needs to trade in the code sleeve at the UCLA store? Do you know if this only applies to the people that SaplingLearning doesn't work for? Or should we all be trading in the code sleeve because SaplingLearning will be inactive after Oct...
- Sun Oct 27, 2019 9:56 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Topics
- Replies: 5
- Views: 214
Re: Midterm Topics
According to a document I found through Lavelle’s website, I believe the midterm will cover up to Outline 3.
- Sun Oct 27, 2019 9:55 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Online Modules
- Replies: 7
- Views: 188
Re: Online Modules
I believe Lavelle announced that the modules were only for the first outline and some of the Quantum unit since it has the most content.
- Sun Oct 27, 2019 9:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Format
- Replies: 11
- Views: 470
Re: Midterm Format
On Lavelle’s website there’s a midterm subheader lower on the page that directs where students go to take their midterm based on last name and lecture. As for the test, the document from the midterm subheader said the test is 120 minutes, 8 questions. The document elaborates a bit further.
- Sun Oct 27, 2019 9:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Overall Grades
- Replies: 1
- Views: 76
Overall Grades
Does anyone know how we’re being graded in this course? It is to my understanding that 50% of all 500 points is a C- but what are the ranges for ‘B’ grades? ‘A’ grades?
- Sun Oct 27, 2019 9:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Study Tips!
- Replies: 7
- Views: 296
Study Tips!
I was wondering if anybody has any really helpful study tips for this class. I know that reading the textbook is one of the most helpful study methods but can anyone suggest anything other than this?
- Sun Oct 27, 2019 9:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Questions
- Replies: 2
- Views: 76
Midterm Questions
In the Midterm review/exam schedule section on Lavelle’s website, it says that test questions are from homework and online assessments. That being said, will the questions actually be taken directly from the pool of assigned homework problems? Or are they just similar?
- Tue Oct 15, 2019 11:17 pm
- Forum: Properties of Electrons
- Topic: Homework problem 1B. 15
- Replies: 2
- Views: 145
Re: Homework problem 1B. 15
I believe the equation used was (hc/E)=λ, E is found from the answer to part b, h is Planck's constant, and c is represented by 2.99792 x 10^8.
- Tue Oct 15, 2019 11:02 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How do I post a new topic?
- Replies: 2
- Views: 17033
Re: How do I post a new topic?
In my personal experience, I post in the topic that's most related, but I saw that someone posed a question regarding the Rydberg equation in the announcement section! But if you cannot find the topic that's most related, I would just post it in a section that's faintly similar because I know some p...
- Tue Oct 15, 2019 10:55 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Atomic Radius
- Replies: 18
- Views: 605
Re: Atomic Radius
In general, the periodic table has the following trends for atomic radius: As you move down a column, atomic radius increases. As you move from left to right along a row, the atomic radius decreases. Wait, actually that sounds very familiar and I think I knew that subconsciously. Hahah thanks! But ...
- Tue Oct 15, 2019 10:50 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Atomic Radius
- Replies: 18
- Views: 605
Atomic Radius
This could be such a basic question but how do you find atomic radius? To be honest, I looked at the solutions manual (specifically for 1F.1 where it asks to list the elements in order of decreasing atomic radius) and still don't understand how the measurement is obtained. Anything helps, thanks!
- Tue Oct 15, 2019 10:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009292
Re: Post All Chemistry Jokes Here
My understanding of chemistry. That's it. That's the joke.
- Thu Oct 10, 2019 11:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Missing Chem Notebook
- Replies: 1
- Views: 170
Re: Missing Chem Notebook
I'll keep my eye out for it. I hope it finds you well.
- Thu Oct 10, 2019 11:38 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 Grading
- Replies: 12
- Views: 917
Re: Test 1 Grading
I'm pretty sure it is graded on how many points out of 50 we get on the test. But if not, I think the test is out of 40 points and we get 10 points for being there? I heard from my friend who took chem 14a last year that her test was out of 40 points. Can anyone confirm this distribution of 10 poin...
- Thu Oct 10, 2019 11:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Extra help
- Replies: 8
- Views: 439
Re: Extra help
As mentioned above, YouTube is a great place for extra explanations on the chemistry topics covered. Organic Chemistry Tutor, The Chemistry Solution, and some of the Conquer Chemistry videos are really helpful!
- Thu Oct 10, 2019 9:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Where do we check our grades?
- Replies: 3
- Views: 244
Re: Where do we check our grades?
I know that for test and exams, we're given a score, but our quarter grade depends on the summation of all test/exam scores and the class average score. So I'm assuming we won't truly know until the final exam scores are released, which is kinda scary to think about. But, I could be wrong. I'm just ...
- Thu Oct 10, 2019 9:29 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Weekly Posts
- Replies: 4
- Views: 229
Re: Weekly Posts
That is a great question! How are we graded on our number of posts if we posted more than the necessary amount in a previous week? Does it carry over?
- Thu Oct 10, 2019 9:23 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 Grading
- Replies: 12
- Views: 917
Test 1 Grading
Hi all,
Does anyone know how the first test is graded? I know it's out of 50 points, but I'm a bit confused on the whole "you get a point for each minute" since obviously the tests are graded on correctness and work to show answers.
Does anyone know how the first test is graded? I know it's out of 50 points, but I'm a bit confused on the whole "you get a point for each minute" since obviously the tests are graded on correctness and work to show answers.
- Thu Oct 03, 2019 1:59 pm
- Forum: Balancing Chemical Reactions
- Topic: HW question L35
- Replies: 2
- Views: 107
Re: HW question L35
I think it's an error in the textbook, because oddly the solution manual lists the reactant as Fe3Br8. Nice catch!
- Thu Oct 03, 2019 1:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Where do we turn in the homework?
- Replies: 5
- Views: 194
Re: Where do we turn in the homework?
I believe the homework is turned into our discussion sections, since the TA's are responsible for the grading of each assignment, test, etc.
- Thu Oct 03, 2019 1:29 am
- Forum: SI Units, Unit Conversions
- Topic: Diagnostic test for chem 17 vs 14A
- Replies: 5
- Views: 369
Re: Diagnostic test for chem 17 vs 14A
You're not alone! I actually know quite a few people, myself included, who lost their chemistry with chemistry. That was a horrible joke but you know what I mean!
- Thu Oct 03, 2019 1:22 am
- Forum: Significant Figures
- Topic: General Question About Scientific Notation
- Replies: 2
- Views: 109
Re: General Question About Scientific Notation
Putting .0014 units into the scientific notation of 1.4 x 10^-3 would better adhere to the rules of sig figs, as the zeros in .0014 are not significant. But, I think these also mostly depend on the number with the least amount of sig figs displayed in the problem itself.
- Thu Oct 03, 2019 12:06 am
- Forum: Molarity, Solutions, Dilutions
- Topic: Dilution Calculations
- Replies: 3
- Views: 120
Re: G.23
It's one of those additions in the problem that tries to trick you and test your knowledge on what's the appropriate course of action when solving the problem.
- Wed Oct 02, 2019 10:30 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Periodic Table & Formulas
- Replies: 2
- Views: 129
Periodic Table & Formulas
When we take tests, finals, etc. will we have access to a periodic table and formulas necessary for the problems on the testing material?
This may or may not have been mentioned during the lecture, but sometimes I'm so deep in note-taking I forget to actually process the words being said.
This may or may not have been mentioned during the lecture, but sometimes I'm so deep in note-taking I forget to actually process the words being said.
- Wed Oct 02, 2019 10:19 pm
- Forum: Balancing Chemical Reactions
- Topic: Tips on Balancing
- Replies: 4
- Views: 140
Re: Tips on Balancing
My high school chemistry teacher would make us practice balancing equations by handwriting each individual element appearing in both the reactants and products sides and how many moles each had (it can be a lot of work, but it can potentially ease you into balancing). For instance in the case of Fe2...
- Wed Oct 02, 2019 6:05 pm
- Forum: Empirical & Molecular Formulas
- Topic: Clarification on the Vitamin C Example
- Replies: 6
- Views: 245
Re: Clarification on the Vitamin C Example
So, if this 0.004g is lost to discrepancy or for rounding purposes, wouldn’t this further our mass percentage composition data from accuracy? Would this be more considered precision?
- Tue Oct 01, 2019 11:53 pm
- Forum: Empirical & Molecular Formulas
- Topic: Clarification on the Vitamin C Example
- Replies: 6
- Views: 245
Clarification on the Vitamin C Example
In the example given in class regarding 8.00g of Vitamin C, where the carbon amounted to 3.27g, hydrogen amounted to 0.366g, and oxygen was 4.36g, Dr. Lavelle emphasized the importance of double-checking that the sum of these amounts equal to the 8.00g. When adding these, you receive a total of 7.99...