Search found 111 matches
- Fri Mar 12, 2021 6:48 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6N.3 Part A. How to get the half-reactions?
- Replies: 1
- Views: 168
6N.3 Part A. How to get the half-reactions?
Screen shot of the question below. I am asking about part A. I am having trouble getting the half-reactions. I know that it has to do with h2 and hcl, but I don't understand why the solutions manuel has H+ going to H2 and vice versa for the anode and cathode. If anyone can help me out that will be g...
- Fri Mar 12, 2021 3:45 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.3 Textbook Why cant we add the half reactions?
- Replies: 3
- Views: 286
6M.3 Textbook Why cant we add the half reactions?
Screenshot of the question is inserted. I am specifically asking for part C. For part C, the standard potential of the anode half-reaction is 0.27 and the standard potential of the cathode half-reaction is 0.79. In the solution manual, we have to use the equation Enot= Enot cathode - Enot anode. Why...
- Thu Mar 11, 2021 5:46 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.5 Part D
- Replies: 3
- Views: 257
Re: 6K.5 Part D
This is the right equation. Disregard the second equation in my question
- Thu Mar 11, 2021 5:12 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.5 Part D
- Replies: 3
- Views: 257
6K.5 Part D
Balance each of the following skeletal equations by using oxidation and reduction half-reactions. All the reactions take place in basic solution. Identify the oxidizing agent and reducing agent in each reaction. PICTURE OF REACTION EQUATION BELOW. I am just confused about why the oxidization half re...
- Wed Mar 10, 2021 10:33 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 7E.3 Textbook Question Help
- Replies: 2
- Views: 309
7E.3 Textbook Question Help
The presence of a catalyst provides a reaction pathway in which the activation energy of a certain reaction is reduced from 125 kJ⋅mol−1 to 75kJ⋅mol−1. (a) By what factor does the rate of the reaction increase at 298 K, all other factors being equal? (b) By what factor would the rate change if the r...
- Sun Mar 07, 2021 11:58 pm
- Forum: Balancing Redox Reactions
- Topic: Studying for finals?
- Replies: 47
- Views: 2788
Re: Studying for finals?
I think the best thing to do is review the textbook problems. It's almost impossible to redo every single one of them, so I recommend just doing one problem of each type from the topics we've already been tested on (unless there's a specific concept that you're struggling with) and all of the ones ...
- Sun Mar 07, 2021 11:57 pm
- Forum: Student Social/Study Group
- Topic: Note Taking
- Replies: 145
- Views: 22178
Re: Note Taking
I do handwritten and just copy the slides, then I make another set of notes that I personalize.
- Sun Mar 07, 2021 11:55 pm
- Forum: Student Social/Study Group
- Topic: How do you deal with burnout?
- Replies: 144
- Views: 26074
Re: How do you deal with burnout?
I feel this too :( I just get plenty of rest and just commit to a schedule of doing things that need to be done.
- Sun Mar 07, 2021 11:54 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: What was your favorite chem topic?
- Replies: 137
- Views: 15050
Re: What was your favorite chem topic?
molecular shape and structure in Chem 14A and thermodynamics (yes i know) from 14B!
- Sun Mar 07, 2021 11:54 pm
- Forum: Student Social/Study Group
- Topic: Book Recommendations
- Replies: 135
- Views: 24413
Re: Book Recommendations
The Perks of Being a Wallflower :)
- Sun Feb 28, 2021 10:37 pm
- Forum: Student Social/Study Group
- Topic: Fave food
- Replies: 266
- Views: 54814
Re: Fave food
It was my birthday weekend, so I made so many french macarons so celebrate. Not very healthy, but my favorite snack/dessert!
- Sun Feb 28, 2021 10:35 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Final
- Replies: 15
- Views: 1025
Re: Final
Sunday morning on March 14, but check the time on the professor's website!
- Sun Feb 28, 2021 10:32 pm
- Forum: Student Social/Study Group
- Topic: Exercising Our Minds and Bodies
- Replies: 120
- Views: 36569
Re: Exercising Our Minds and Bodies
Running and stretching!
- Sun Feb 28, 2021 10:32 pm
- Forum: Student Social/Study Group
- Topic: Balance / Self Care Tips
- Replies: 62
- Views: 4669
Re: Balance / Self Care Tips
Reading (recreational reading) and excercise are my best self-care tips!
- Sun Feb 28, 2021 10:31 pm
- Forum: Student Social/Study Group
- Topic: Fav Shows of the Moment
- Replies: 115
- Views: 61152
Re: Fav Shows of the Moment
Im too busy at the moment haha, but during spring break im definitely going to binge watch some 90's classics.
- Mon Feb 22, 2021 1:37 am
- Forum: Student Social/Study Group
- Topic: Balance / Self Care Tips
- Replies: 62
- Views: 4669
Re: Balance / Self Care Tips
I feel like reading and cardio really helps!
- Thu Feb 18, 2021 11:17 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: The difference in approaching 4J.13 and 4J.15 in the Textbook
- Replies: 3
- Views: 318
The difference in approaching 4J.13 and 4J.15 in the Textbook
4J.13 Determine which of the following compounds are stable with respect to decomposition into their elements under standard conditions at 25 °C (see Appendix 2A): (a) PCl5(g); (b) HCN(g); (c) NO(g); (d) SO2(g). 4J.15 Which of the following compounds become less stable with respect to the elements a...
- Thu Feb 18, 2021 4:25 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Textbook question 4I.5
- Replies: 1
- Views: 242
Textbook question 4I.5
Suppose that 50.0 g of water at 20.0°C is mixed with 65.0 g of water at 50.0°C at constant atmospheric pressure in a thermally insulated vessel. Calculate ΔS and ΔStot for the process. I understand that since there is a temperature change we have to use ∆S=nCmln(Tf/Ti) in order to solve the equation...
- Wed Feb 17, 2021 2:09 pm
- Forum: Calculating Work of Expansion
- Topic: 4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)
- Replies: 1
- Views: 173
Re: 4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)
wait, I reread this question again, and since C6H6 is a liquid does that mean we have to find the change in gas molecules?
- Wed Feb 17, 2021 2:01 pm
- Forum: Calculating Work of Expansion
- Topic: 4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)
- Replies: 1
- Views: 173
4.7 7th Edition (why do we need to calculate the net production of moles of the reaction)
4.7 4.7 (a) Calculate the work that must be done against the atmosphere for the expansion of the gaseous products in the combustion of 1.00molC6H6(l) at 25 °C and 1.00 bar. (b) Using data in Appendix 2A, calculate the standard enthalpy of the reaction. (c) Calculate the change in internal energy, ΔU...
- Mon Feb 15, 2021 2:10 am
- Forum: Ideal Gases
- Topic: 4.17 How to Identify When We Should Use the Ideal Gas Law?
- Replies: 4
- Views: 525
4.17 How to Identify When We Should Use the Ideal Gas Law?
A technician carries out the reaction 2SO2(g)+O2(g)→SO3(g)at 25 °C and 1.00 atm in a cylinder fitted with a piston and maintained at constant pressure. Initially, 0.030 mol SO2 and 0.030 mol O2 are present in the cylinder. The technician then adds a catalyst to initiate the reaction. (a) Calculate t...
- Sun Feb 14, 2021 11:54 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Favorability of a Reaction and ∆U
- Replies: 4
- Views: 269
Favorability of a Reaction and ∆U
Is there a way to tell whether or not a reaction can be favorable depending on ∆U?
- Sun Feb 14, 2021 11:53 pm
- Forum: Calculating Work of Expansion
- Topic: 4D.7 7th Edition
- Replies: 2
- Views: 275
4D.7 7th Edition
(a) Calculate the work that must be done against the atmosphere for the expansion of the gaseous products in the combustion of 1.00 mol C6H6(l) at 25°C and 1.00 bar. (b) Using data in Appendix 2A, calculate the standard enthalpy of the reaction. (c) Calculate the change in internal energy, ΔU, of th...
- Sun Feb 14, 2021 11:46 pm
- Forum: Calculating Work of Expansion
- Topic: When work is positive and negative
- Replies: 3
- Views: 262
When work is positive and negative
When work is negative, the system is doing work and when the work is positive, then work is being done on the system?
Is that correct?
Is that correct?
- Sun Feb 14, 2021 11:43 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Does ∆U depend on q, w, and T?
- Replies: 5
- Views: 366
Does ∆U depend on q, w, and T?
Does ∆U always depend on w, q, and T? I am asking since there are two equations for ∆U, which are ∆U=3/2nR∆T and ∆U=q+w.
- Sun Feb 14, 2021 11:39 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Internal Energy, When Q is zero?
- Replies: 4
- Views: 390
Internal Energy, When Q is zero?
When q is zero in ∆U=q+w, does this mean that there is no heat transferred to the surroundings? When q is negative, it means that heat is released and when q is positive this means that there is heat absorption?
Can someone let me know if my statements are correct, or if I'm wrong.
Can someone let me know if my statements are correct, or if I'm wrong.
- Sun Feb 07, 2021 11:54 pm
- Forum: Student Social/Study Group
- Topic: Superbowl Sunday
- Replies: 26
- Views: 2065
Re: Superbowl Sunday
505598869 wrote:I was wrong to bet against the bucks.
LOL
- Sun Feb 07, 2021 11:52 pm
- Forum: Student Social/Study Group
- Topic: Study routine.
- Replies: 51
- Views: 3594
Re: Study routine.
I think consistently practicing is the best place to start. Going to UA sessions, practice textbook problems, sapling, all of those will help with the midterms and finals. Remember not to cram!
- Sun Feb 07, 2021 11:50 pm
- Forum: Student Social/Study Group
- Topic: Fav Shows of the Moment
- Replies: 115
- Views: 61152
Re: Fav Shows of the Moment
Attack on Titan
- Sun Feb 07, 2021 11:49 pm
- Forum: Student Social/Study Group
- Topic: Post Midterm 1...
- Replies: 39
- Views: 2320
Re: Post Midterm 1...
I feel the same way, but don't feel too bad over it :) I find what has been helpful so far is going to UA sessions!
- Sun Feb 07, 2021 11:47 pm
- Forum: Student Social/Study Group
- Topic: Silly Mistakes?
- Replies: 72
- Views: 8063
Re: Silly Mistakes?
Thanks for sharing this! It made me feel better about my mistakes on the test too!
- Sun Jan 31, 2021 11:43 pm
- Forum: Student Social/Study Group
- Topic: Worried About MT 1 Grades
- Replies: 39
- Views: 2526
Re: Worried About MT 1 Grades
I never related to a chem community post more. Last quarter's midterms and this quarter's midterms are vastly different in terms of how challenging they were. I think we just need to try our best and see how it goes. We did the best we could and that's what matters the most.
- Sun Jan 31, 2021 11:41 pm
- Forum: Student Social/Study Group
- Topic: Midterm Grades
- Replies: 15
- Views: 936
Re: Midterm Grades
Hopefully by the end of the week!
- Sun Jan 31, 2021 11:40 pm
- Forum: Student Social/Study Group
- Topic: Spring 2021
- Replies: 106
- Views: 26687
Re: Spring 2021
I am waiting next year as I want to get some hands on experience!
- Sun Jan 31, 2021 11:39 pm
- Forum: Student Social/Study Group
- Topic: Work Life Balance
- Replies: 44
- Views: 2293
Re: Work Life Balance
I completely relate to this! I think as hard as it is, try to incorporate some healthy habits to keep our mental wellness in check, like listening to music, going in walks, or reading books. Hope this gets better!
- Sun Jan 31, 2021 11:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling Reset?
- Replies: 17
- Views: 1637
Re: Sapling Reset?
Unfortunately, I do not think there is a reset button. What has been helpful to me is to take notes on the sapling questions so I can come back to it later.
- Sun Jan 24, 2021 11:43 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Approximation
- Replies: 5
- Views: 359
Re: Approximation
Professor Lavelle said that to be safe, whenever Ka < 10-4 then we are good to use the approximation. I don't think that will change in an exam setting either.
- Sun Jan 24, 2021 11:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Approximately x
- Replies: 18
- Views: 796
Re: Approximately x
Professor Lavelle has stated to be safe, whenever Ka < 10-4
- Sun Jan 24, 2021 11:37 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 162349
Re: Reading the textbook
I actuallly dont read the textbook and whenever I have a question I either ask the UA's or go to the professor's office hours.
- Sun Jan 24, 2021 11:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 324417
Re: Tutoring? [ENDORSED]
PLF sessions are also very helpful!!
- Sun Jan 24, 2021 11:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student - Part II [ENDORSED]
- Replies: 298
- Views: 359326
Re: Advice from a Medical Student - Part II [ENDORSED]
thank you so much for your update! this was so inspiring!!
- Sun Jan 24, 2021 11:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Accessing the E-textbook [ENDORSED]
- Replies: 125
- Views: 37687
Re: Accessing the E-textbook [ENDORSED]
If you get the e-text, then it comes with the solutions manuel! not sure if that is included in the looseleaf version.
- Sun Jan 17, 2021 11:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: quadratic formula values
- Replies: 13
- Views: 847
Re: quadratic formula values
if both are positive, choose the one that will not result in a negative number when you plug it in the equations for equilibrium constants. For example, if an equation to find the equilibrium concentration of a reactant is 0.5-x and you have values 0.2 and 0.8 from your quadratic equation, 0.8 will ...
- Sun Jan 17, 2021 11:51 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ICE table values
- Replies: 20
- Views: 998
Re: ICE table values
You should use the units given in the question, but mol/L is standard.
- Sun Jan 17, 2021 11:49 pm
- Forum: Student Social/Study Group
- Topic: Midterms During Lecture
- Replies: 44
- Views: 2782
Re: Midterms During Lecture
Yes midterms are during lecture. I believe this was in the syllabus.
- Sun Jan 17, 2021 11:45 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 74
- Views: 5702
Re: PV=nRT
P is for Pressure, V is for Volume in Liters, n is for number of moles, R is for gas constant, and T is for Temperature in Kelvin
- Sun Jan 17, 2021 11:44 pm
- Forum: Student Social/Study Group
- Topic: Comfort Movies
- Replies: 168
- Views: 49560
Re: Comfort Movies
How To Be Single!! Dakota Johnson is such a great actress imo and this movie really shows how everyone's successes and timings are different! Really good to wind down after a stressful event (class).
- Sun Jan 10, 2021 11:30 pm
- Forum: Student Social/Study Group
- Topic: Sapling Homework
- Replies: 15
- Views: 1053
Re: Sapling Homework
I think Dr. Lavelle assigns different due dates. It might not be the end of every week.
- Sun Jan 10, 2021 11:28 pm
- Forum: Student Social/Study Group
- Topic: Exam Changes
- Replies: 12
- Views: 665
Re: Exam Changes
Yes, our midterms will be during lecture for this quarter and not during discussion like it was last quarter.
- Sun Jan 10, 2021 11:27 pm
- Forum: Student Social/Study Group
- Topic: Study Tips
- Replies: 32
- Views: 1729
Re: Study Tips
I find that going to workshops and step-up sessions before exams helped a lot. For this quarter, I'm going to try to go to at least one step-up and two-workshops per week so I can keep up with those worksheets!
- Sun Jan 10, 2021 11:25 pm
- Forum: Student Social/Study Group
- Topic: Study Habits
- Replies: 96
- Views: 9680
Re: Study Habits
The best thing that I can do differently for myself this quarter is to make a schedule to realistically space out my studying, and force myself to stick to it. Cramming does not work, especially in a class like this. I find that it is better to study ahead of time so I can retain the information bet...
- Mon Dec 14, 2020 11:57 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 49
- Views: 3425
Re: Final Exam
Yeah, I felt rushed too. Many people did. I dont think the alloted time was enough. Good luck to you though! Just remember that theres always chances to do better and grad schools like to see upward trends :)
- Sat Dec 12, 2020 4:16 pm
- Forum: Bronsted Acids & Bases
- Topic: Why is H2SO3 an acid when the oxygens have lone pairs?
- Replies: 2
- Views: 583
Why is H2SO3 an acid when the oxygens have lone pairs?
So H2SO3 is an acid, but the lewis structure (which I inserted below) has lone pairs to attract H+ ions from H2O, which will make OH- ions. So why is it an acid and not a base? What makes H2SO3 lose H+ ions but not attract them?
- Sat Dec 12, 2020 12:33 pm
- Forum: Bronsted Acids & Bases
- Topic: Textbook Problem J.1 Part C
- Replies: 3
- Views: 347
Textbook Problem J.1 Part C
This question asks to classify whether certain molecules are acids or bases. For part C, since KOH has an H, I thought this means that it could give off a proton and be an acid. Why is KOH a base and not an acid?
- Sat Dec 12, 2020 7:11 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Textbook Problem 9C.5
- Replies: 5
- Views: 520
Re: Textbook Problem 9C.5
This is the pic, forgot to insert.
- Sat Dec 12, 2020 7:10 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Textbook Problem 9C.5
- Replies: 5
- Views: 520
Textbook Problem 9C.5
In part d, the question asks the ligand can be polydentate, and give the maximum number of places on the ligand that can bind simultaneously to a single metal center. For oxalate ion, the formula is C2O4 2-. I attached a picture. Since there are lone pairs on 4 of the atoms, what makes it bidentate ...
- Sat Dec 12, 2020 12:34 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Why is CO (carbon monoxide) monodentate?
- Replies: 6
- Views: 1714
Re: Why is CO (carbon monoxide) monodentate?
FrancescaHawkins3J wrote:In my understanding, CO is a monodentate ligand because when one of the lone pairs becomes a bonding pair, it repels the other lone pair, which becomes too far away to create a second bond.
This makes perfect sense! Thank you!
- Sat Dec 12, 2020 12:07 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Why is CO (carbon monoxide) monodentate?
- Replies: 6
- Views: 1714
Why is CO (carbon monoxide) monodentate?
So the lewis structure of CO is C and O having triple bonds and there are 1 lone pair on each C and O. Since there are two lone pairs on the CO molecule, why isnt it a bidentate ligand?
- Fri Dec 11, 2020 11:43 pm
- Forum: Lewis Structures
- Topic: Confused about Fe's (Iron) total valence electrons
- Replies: 2
- Views: 1370
Confused about Fe's (Iron) total valence electrons
Since Fe is a transition metal and has unfilled d orbitals, it can have up to 12 valence electrons when bonding; for example in the molecule Ba(FeBr4)2. Usually, when it is not bonded, it just has 2 valence electrons.
Can someone confirm or deny whether the statement above is correct?
Can someone confirm or deny whether the statement above is correct?
- Thu Dec 10, 2020 11:31 pm
- Forum: Conjugate Acids & Bases
- Topic: What is the difference between a lewis acid and bases and Bronsted acids and bases?
- Replies: 7
- Views: 615
What is the difference between a lewis acid and bases and Bronsted acids and bases?
To my understanding, Bronsted acids and bases use the accepting or donating of H+ ions in their definition, while lewis acids and bases go by accepting or donating electrons in their definition. Is this correct?
- Thu Dec 10, 2020 12:37 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Why is NH2 a bidentate ligand?
- Replies: 2
- Views: 1550
Why is NH2 a bidentate ligand?
The definition of a bidentate ligand is one that is able to donate 2 electron pairs. Since each N has 5 valence electrons and it bonds to Co, H, and another H, then it only has a lone pair left. Wouldnt this make each NH2 a monodentate ligand? I have attached an image of the coordination compound be...
- Thu Dec 10, 2020 5:28 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Why is NH2 a bidentate ligand?
- Replies: 1
- Views: 206
Why is NH2 a bidentate ligand?
The definition of a bidentate ligand is one that is able to donate 2 electron pairs. Since N has 5 valence electrons and it bonds to Co, H, and another H, then it only has a lone pair left. Wouldnt this make NH2 a monodentate ligand?
- Thu Dec 10, 2020 12:15 am
- Forum: Quantum Numbers and The H-Atom
- Topic: Why does nickel have an expanded octet?
- Replies: 3
- Views: 361
Why does nickel have an expanded octet?
Can someone explain why nickel has an expanded octet?
To my understanding, there are 8 electrons in nickel's 3d state, and there are 2 electrons in its 4s state. So how does it have an expanded octet?
To my understanding, there are 8 electrons in nickel's 3d state, and there are 2 electrons in its 4s state. So how does it have an expanded octet?
- Wed Dec 09, 2020 11:36 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Why does nickel have an expanded octet?
- Replies: 6
- Views: 773
Why does nickel have an expanded octet?
Since nickel has n=4, which means it contains the f-orbitals, is this why it has an expanded octet?
- Wed Dec 09, 2020 6:51 pm
- Forum: Bronsted Acids & Bases
- Topic: why is SO2 acidic?
- Replies: 1
- Views: 186
why is SO2 acidic?
Why is SO2 acidic when it accepts a proton?
- Mon Dec 07, 2020 4:42 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Cisplatin Question
- Replies: 1
- Views: 220
Cisplatin Question
In cisplatin, why do the chlorines unbind from the ligand, and not the amine groups? Shouldn't the bond between platinum and ammonia be more sensitive to breaking off as opposed to the chlorine?
- Sun Dec 06, 2020 10:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: final format
- Replies: 5
- Views: 432
Re: final format
My TA said it was about 30 questions, and partial credit might be given to questions with multiple parts. I'd check with your TA just to make sure :)
- Sun Dec 06, 2020 10:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Extra Credit
- Replies: 13
- Views: 894
Re: Extra Credit
I don't think extra credit is offered, but I would ask just to make sure :)
- Sun Dec 06, 2020 10:40 pm
- Forum: Student Social/Study Group
- Topic: Point distribution
- Replies: 11
- Views: 803
Re: Point distribution
I totally understand your point of view, but he is allowing many people to pass with a C- by just earning half the points in the course. I know several of us really want to pass with an A, including myself, but the pandemic sadly puts everyone in a difficult position. Do not let earning a grade low...
- Sun Dec 06, 2020 10:36 pm
- Forum: Student Social/Study Group
- Topic: How are you?
- Replies: 154
- Views: 21320
Re: How are you?
I'm doing well! I'm just glad its the holidays. the holiday season is so overrated but is my favorite season of the year!
- Sun Dec 06, 2020 2:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Lectures not loading
- Replies: 6
- Views: 370
Lectures not loading
Ever since CCLE came back up this late morning, my lectures wouldn't load. I tried clearing out cookies and logging back in, but does anyone know what else I can do?
- Sun Nov 29, 2020 10:27 pm
- Forum: Student Social/Study Group
- Topic: Midterm Partial Credit
- Replies: 19
- Views: 1345
Re: Midterm Partial Credit
I think that questions that are harder and have more room for error have partial credit, but just to make sure I recommend emailing the professor or your TA :)
- Sun Nov 29, 2020 10:26 pm
- Forum: Student Social/Study Group
- Topic: How have your study habits changed?
- Replies: 45
- Views: 2531
Re: How have your study habits changed?
Procrastination is my worse enemy, and I think I'm getting a little bit better, but I definitely still have room for improvement :)
- Sun Nov 29, 2020 10:24 pm
- Forum: Student Social/Study Group
- Topic: How to study for class
- Replies: 30
- Views: 1727
Re: How to study for class
I find that going over the lecture notes and re-explaining the concepts to myself in my head are beneficial, as well as doing the outline homework. I only do the questions, I don't read the textbook though because I am very much a visual learner.
- Sun Nov 29, 2020 10:23 pm
- Forum: Student Social/Study Group
- Topic: Studying for Final Exam
- Replies: 57
- Views: 3679
Re: Studying for Final Exam
I find that going over the outline questions and attending as many workshops as I can are very helpful! For older material I was planning to review the modules on the professor's website.
- Sun Nov 29, 2020 10:21 pm
- Forum: Student Social/Study Group
- Topic: Tips for Staying Focused
- Replies: 64
- Views: 5299
Re: Tips for Staying Focused
I honestly struggle with this so much so I don't even know if I'm qualified to answer, but my best tips would be to listen to instrumental music (dont listen to music with voices and lyrics, very distracting), have snacks and water on hand, take breaks, and be in a not too cold or not too hot enviro...
- Sun Nov 22, 2020 11:53 pm
- Forum: Student Social/Study Group
- Topic: How to relax after midterms
- Replies: 54
- Views: 4176
Re: How to relax after midterms
I really like to paint! or read a new book! :)
- Sun Nov 22, 2020 11:48 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Lectures through Thanksgiving
- Replies: 7
- Views: 557
Re: Lectures through Thanksgiving
I think we will have class since we only do really have Thursday and Friday off, but I would check with the TA or ask the professor during OH to make sure :)
- Sun Nov 22, 2020 11:47 pm
- Forum: Student Social/Study Group
- Topic: Exercising Our Minds and Bodies
- Replies: 120
- Views: 36569
Re: Exercising Our Minds and Bodies
I live near the woods, so I like to run around there during daylight :)
- Thu Nov 19, 2020 1:00 am
- Forum: Ionic & Covalent Bonds
- Topic: How to determine which molecule is more ionic?
- Replies: 11
- Views: 2772
How to determine which molecule is more ionic?
So I understand that BaBr2 is more ionic than BeBr2 because since electronegativity decreases down a group, then the electronegative difference between Ba and Br is greater than the electronegative difference between Be and Br2. However, I am confused because then why is NaCl a stronger ionic bond t...
- Wed Nov 18, 2020 12:26 am
- Forum: Ionic & Covalent Bonds
- Topic: Relationship of Cations in Melting Points
- Replies: 1
- Views: 344
Relationship of Cations in Melting Points
So what is the relationship of cations and melting points? So if cations that are smaller in size and have higher positive charges are stronger, then why does NaCl have a stronger ionic bond and a higher melting point than MgCl2. Mg is smaller than Na and has a 2+ charge, while Na has a 1+ charge. C...
- Sun Nov 15, 2020 11:52 pm
- Forum: Dipole Moments
- Topic: Which interactions are intermolecular?
- Replies: 7
- Views: 436
Which interactions are intermolecular?
To my understading:
When it comes to ion - dipole, hydrogen bonding, dipole-dipole interactions, and london dispersion forces, these are all intermolecular interatcions, not intramolecular interactions.
Can someone confirm or deny what I stated is correct?
When it comes to ion - dipole, hydrogen bonding, dipole-dipole interactions, and london dispersion forces, these are all intermolecular interatcions, not intramolecular interactions.
Can someone confirm or deny what I stated is correct?
- Sun Nov 15, 2020 5:53 pm
- Forum: Ionic & Covalent Bonds
- Topic: Difference on how atomic size affects covalent and dipole interactions
- Replies: 9
- Views: 2159
Difference on how atomic size affects covalent and dipole interactions
To my understanding: For covalent bonds, increasing the atomic radius would result in a larger distance and a weaker bond, while for London dispersion forces, increasing the atomic radii would cause higher polarizability and thus a greater intermolecular attraction. Can someone confirm or deny what ...
- Sun Nov 15, 2020 5:44 pm
- Forum: Dipole Moments
- Topic: Do london dispersion forces occur for polar molecules
- Replies: 3
- Views: 435
Do london dispersion forces occur for polar molecules
For one of the questions on the week 5 and 6 sapling homework, there was an explanation of one of the homework questions that stated "dispersion forces do not involve electrostatic interactions of polar groups and are present between all molecules. I'm a bit confused by this statement since it ...
- Sun Nov 15, 2020 3:17 am
- Forum: Octet Exceptions
- Topic: How does sulfur have up to 12 valence electrons
- Replies: 3
- Views: 2740
How does sulfur have up to 12 valence electrons
I'm confused about how sulfur can have 12 valence electrons in SO42- and SF6. I thought that since sulfur is in the third period, it could only go up to 10 valence electrons because sulfur's electrons can be excited to the 3d state. Any clarification would be appreciated.
- Sat Nov 14, 2020 8:03 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: under which circumstances does 4s have lower energy than 3d?
- Replies: 2
- Views: 316
under which circumstances does 4s have lower energy than 3d?
So to my understanding, the 4s state is lower than the 3d state only when the 3d state does not get filled, or when the 4s state gets filled before the 3d state, correct? For example, in the electron configuration of Ca:[Ar] 4s^2, the 4s state would be lower than the 3d state because Ca does not hav...
- Sun Nov 08, 2020 7:35 pm
- Forum: Student Social/Study Group
- Topic: Mid-quarter Check in
- Replies: 67
- Views: 5332
Re: Mid-quarter Check in
Not going to lie, the online format is honestly very depressing. With that being said, this class, in particular, is so much better than all my other classes. I feel like this class is very accomodating given all the changes from in-person classes to online classes. Hope everyone is drinking water a...
- Sun Nov 08, 2020 7:21 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Reviewing Answers for Midterm 1
- Replies: 13
- Views: 772
Re: Reviewing Answers for Midterm 1
For my TA, he said that we have to email him to see which questions we missed. To clarify, I think it would be best to email your TA :)
- Sun Nov 08, 2020 7:19 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 2 Question Count
- Replies: 17
- Views: 774
Re: Midterm 2 Question Count
I'm pretty sure it will be about the same number of questions. For the difficulty level, I'm not sure if midterm 2 is going to be harder than midterm 1.
- Sun Nov 08, 2020 7:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Curve?
- Replies: 12
- Views: 682
Re: Midterm Curve?
Since the average for the midterm was high, I doubt that there will be a curve. But please check with your TA to clarify :)
- Sun Nov 08, 2020 7:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 2 Format
- Replies: 7
- Views: 365
Re: Midterm 2 Format
Hi! I'm pretty sure it will be the same format, with multiple-choice questions using Respondus.
- Sun Nov 01, 2020 11:49 pm
- Forum: DeBroglie Equation
- Topic: sapling homework
- Replies: 4
- Views: 389
Re: sapling homework
So your objective is to find the difference between the incident photons and the energy of the ejected electrons, in eV/atom. So since they give you the wavelength, you would use that to find the energy per photon in joules, convert that to energy per photon in eV. You would subtract the 0.137 eV by...
- Sun Nov 01, 2020 11:45 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Why is the 4s state filled before the 3d state?
- Replies: 14
- Views: 978
Why is the 4s state filled before the 3d state?
For K (potassium) on the periodic table, after Argon, you would just jump to period 4 for K, which would result in the electron configuration of potassium, K: [Ar]4s^1. Therefore the energy of the 4s state will be lower than the 3d state unless I fill the 3d state for another element (ie, scandium),...
- Sun Nov 01, 2020 11:21 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Why we do not specify if n is s, p, or d for one electron systems?
- Replies: 2
- Views: 230
Why we do not specify if n is s, p, or d for one electron systems?
So to my understanding, for hydrogen, we don't specify orbitals with the principal quantum number (n=1,2,3 etc) with the angular momentum (l) or the orientation of the angular momentum because the energy for the electron in the orbital is the same? If I am correct above, then the interaction of mult...
- Thu Oct 29, 2020 5:40 pm
- Forum: Photoelectric Effect
- Topic: when to use the kinetic energy equation and when to use Bohr's equation
- Replies: 2
- Views: 190
when to use the kinetic energy equation and when to use Bohr's equation
This is a discussion question from week two and I'm confused for part c. Part C asks what is the wavelength of the radiation that caused photo ejection of the electron. So for this question, I thought we can use the equation E photon = h times c / wavelength because we are trying to find the wavelen...
- Thu Oct 29, 2020 3:04 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Atomic Spectra Post Module Question
- Replies: 2
- Views: 222
Atomic Spectra Post Module Question
So this question asks what region of the electromagnetic spectrum does this wavelength correspond. Can someone clarify how to determine which wavelengths go in which region of the electromagnetic spectrum? This is the module question. The meter was defined in 1963 as 1,650,763.73 wavelengths of radi...
- Sun Oct 25, 2020 11:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: exam format
- Replies: 1
- Views: 101
Re: exam format
10 multiple choice questions with varying difficulty!
- Sun Oct 25, 2020 11:16 pm
- Forum: Properties of Light
- Topic: Is c always the speed of light?
- Replies: 92
- Views: 7246
Re: Is c always the speed of light?
Based on what we've learned so far, C would be the speed of light unless the question otherwise specifies
- Sun Oct 25, 2020 11:12 pm
- Forum: Properties of Light
- Topic: How are you guys studying for the midterm?
- Replies: 19
- Views: 1262
Re: How are you guys studying for the midterm?
video modules, retake the module tests and try to get the questions rights without referencing your notes too much, and then text book problems!
- Sun Oct 25, 2020 11:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: what kind of calculator
- Replies: 4
- Views: 192
Re: what kind of calculator
We are supposed to use a scientific calculator for the exam. I'm not sure if we are allowed to use a scientific graphing calculator so I'd recommend to email the professor or your TA :)