Search found 90 matches
- Mon Mar 09, 2020 1:53 am
- Forum: Experimental Details
- Topic: picking a trial
- Replies: 13
- Views: 1554
Re: picking a trial
You should end up with the same result, i guess we just always try to pick out the easiest choice
- Mon Mar 09, 2020 1:52 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: Rate Laws
- Replies: 3
- Views: 227
Re: Rate Laws
I also believe it'd always require some work/calculation
- Mon Mar 09, 2020 1:51 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Theory
- Replies: 3
- Views: 276
Re: Arrhenius Theory
from my understanding, the equation helps us account for the factors that impact the rate of a reaction that we don't see in the rate laws
- Sat Mar 07, 2020 11:16 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Electromotive force (emf)
- Replies: 9
- Views: 610
Re: Electromotive force (emf)
if its the same as cell potential I would assume we don't need to know much more about it
- Sat Mar 07, 2020 11:13 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: non ideal gases
- Replies: 6
- Views: 611
Re: non ideal gases
yes, and not moles in the way we used to think of it, which is something that really confused me at first
- Sat Mar 07, 2020 11:11 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: biological examples
- Replies: 3
- Views: 323
- Sat Mar 07, 2020 11:08 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: pH and Oxidizing Strength
- Replies: 3
- Views: 283
Re: pH and Oxidizing Strength
Also, how do you know if a metal/other compound is a strong reducing/oxidizing agent? I imagine theres a few ways but I do remember reading somewhere that good reducing agents tend to have large atomic radiuses and atoms with low EN so I figure thats one way you might be able to tell if its strong,...
- Sat Mar 07, 2020 10:59 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Equilibrium Constants
- Replies: 3
- Views: 237
Re: Equilibrium Constants
It depends on what you're given but probably you can use the Nernst equation, but it depends on if you're given enough to use that
- Sat Mar 07, 2020 10:48 pm
- Forum: Balancing Redox Reactions
- Topic: Physical state
- Replies: 6
- Views: 419
Re: Physical state
Since we only change coefficients I don't believe the physical states are altered
- Sat Mar 07, 2020 10:44 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Study Advice
- Replies: 73
- Views: 6745
Re: Study Advice
I find myself very lost at times and started going to the step up sessions, which I have found pretty helpful. Before then I would just go to my PLF but the step up sessions have given me a nice boost in my understanding
- Sun Mar 01, 2020 9:24 pm
- Forum: Balancing Redox Reactions
- Topic: Redox Reactions and Acid/Base Reactions
- Replies: 9
- Views: 681
Re: Redox Reactions and Acid/Base Reactions
Redox reactions just have to involve a change in oxidation number for one or more reactant elements, so it is not limited to that
- Sun Mar 01, 2020 9:20 pm
- Forum: Balancing Redox Reactions
- Topic: Cell Diagrams
- Replies: 14
- Views: 932
Re: Cell Diagrams
I'm not sure what sources switch it up, but I would say in the context of this class the anode will stay on the left and cathode on the right
- Sun Mar 01, 2020 9:16 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidizing/reducing agent
- Replies: 18
- Views: 1045
Re: Oxidizing/reducing agent
oxidizing agents = the ones carrying out the oxidation. and then same with reduction agents
- Sun Mar 01, 2020 9:15 pm
- Forum: Balancing Redox Reactions
- Topic: oxidizing agents
- Replies: 11
- Views: 588
Re: oxidizing agents
I like to think of it as, the oxidizing agents carry out the oxidation, and same with reduction
- Sun Mar 01, 2020 8:01 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Activated complex
- Replies: 4
- Views: 763
Re: Activated complex
I would assume we do not need to know it for the final
- Sun Feb 23, 2020 11:55 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Units in Entropy Equation for Volume
- Replies: 5
- Views: 327
Re: Units in Entropy Equation for Volume
I believe the units for entropy after the calculations should end up being J/K
- Sun Feb 23, 2020 11:54 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: S = 0
- Replies: 21
- Views: 1127
Re: S = 0
its zero for an isothermal reversible reaction!
- Sun Feb 23, 2020 11:45 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: w max
- Replies: 3
- Views: 355
- Sun Feb 23, 2020 11:42 pm
- Forum: Calculating Work of Expansion
- Topic: Work without volume
- Replies: 5
- Views: 375
Re: Work without volume
since what we learned involves expansion of volume, we need the change in volume to see how much work is done
- Sun Feb 23, 2020 7:17 pm
- Forum: Balancing Redox Reactions
- Topic: Half reactions
- Replies: 7
- Views: 480
Re: Half reactions
Mariana Fuentes 1L wrote:A way of identifying redox reactions is : The LEO goes GER.
LEO: Lose Electrons Oxidation
GER: Gain Electrons Reduction
there's also OIL RIG, which is:
Oxidation Is Loss= OIL
Reduction Is Gain= RIG
which is referring to loss/gain of electrons
- Sun Feb 23, 2020 7:10 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing redox reactions
- Replies: 5
- Views: 407
Re: Balancing redox reactions
https://www.youtube.com/watch?v=v5sDNmYCaqo
this video on balancing redox reactions was helpful to me
this video on balancing redox reactions was helpful to me
- Sun Feb 23, 2020 6:59 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: rust
- Replies: 9
- Views: 693
Re: rust
rusting is an oxidation reaction. iron reacts with water and oxygen to form hydrated iron(III) oxide. both water and oxygen and needed for rusting to occur. so our learning of these types of reactions applies
- Sun Feb 23, 2020 6:48 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: galvanic/voltaic cells
- Replies: 7
- Views: 808
Re: galvanic/voltaic cells
the terms are used like interchangeable synonyms so I believe they are the same
- Sun Feb 23, 2020 6:38 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: chemistry community posts
- Replies: 12
- Views: 596
Re: chemistry community posts
Robert Tran 1B wrote:The posts are usually counted at the end of the quarter. You should do 5/week to stay on track, but as long as you have 50 by the end of the quarter and you didn't do a bunch of them at the same time, you'll be good.
is this true? I assumed they were checked every week by the end of sunday
- Sun Feb 23, 2020 6:36 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Half reactions
- Replies: 13
- Views: 717
Re: Half reactions
https://www.youtube.com/watch?v=fdbrhQAM9Gw
this video helped me understand half reactions a little better.
this video helped me understand half reactions a little better.
- Sun Feb 23, 2020 3:50 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: 5G.15
- Replies: 5
- Views: 323
Re: 5G.15
in that case, it seems like it is most likely wrong
- Tue Feb 11, 2020 4:29 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: equations
- Replies: 4
- Views: 142
Re: equations
read closely as to what they give you. Sometimes they give you information to throw you off but look for any constant pressure, temperature, or volume. Also read closely to know exactly what values change. Also read for any words that describe the reaction or changes in the systems. If you know the ...
- Tue Feb 11, 2020 4:25 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: Online resources for W/Boltzmann EQ
- Replies: 1
- Views: 220
- Tue Feb 11, 2020 4:15 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: First Law
- Replies: 5
- Views: 359
Re: First Law
Dang, studying for the midterm but this question has me curious now. I honestly have no idea but if we are trying to put it in context of that law, I guess matter isn't being created but rather expanded and recycled. But then again I don't know much about space and the universe. it'd be really crazy...
- Tue Feb 11, 2020 4:00 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 240111
Re: Tutoring? [ENDORSED]
AAP is honestly the best form of help with a class in my experience. PLFs help a lot and in my experience you form a nice small community with people in your classes you wouldn't have met otherwise
- Tue Feb 11, 2020 4:00 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 240111
Re: Tutoring? [ENDORSED]
AAP is honestly the best form of help with a class in my experience. PLFs help a lot and in my experience you form a nice small community with people in your classes you wouldn't have met otherwise
- Tue Feb 11, 2020 3:51 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: Second and Third Law of Thermodynamics
- Replies: 2
- Views: 115
- Tue Feb 11, 2020 3:40 pm
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: Degrees of Change in Entropy
- Replies: 5
- Views: 180
Re: Degrees of Change in Entropy
I think we should usually convert to kelvin, but it might depend on what the question says
- Tue Feb 11, 2020 3:36 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: All Laws of Thermodynamics
- Replies: 2
- Views: 156
Re: All Laws of Thermodynamics
not sure about the concepts, but I feel like if you know the conceptual side or the actual formula part well, you'll be able to figure out the part you don't know
- Tue Feb 11, 2020 3:32 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Midterm Material
- Replies: 10
- Views: 490
Re: Midterm Material
I assume we shouldn't focus on it much, but it might help knowing more about it but I am not sure if its worth risking studying it more instead of earlier topics
- Thu Feb 06, 2020 9:35 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: PLF sessions
- Replies: 6
- Views: 327
Re: PLF sessions
How do I gain access to the emails of PLF instructors to join? I could use some help with chemistry and math /: if you're in AAP, you can just ask around and ask any PLF instructors if they know of any people who lead the PLF sessions you're looking for. I'm in AAP but one time my enrollment in PLF...
- Sun Feb 02, 2020 7:21 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: isolated system
- Replies: 13
- Views: 600
Re: isolated system
the example i think of is a hydroflask. a water bottle like that isn't perfect, but ideally you can think that the temperatures don't transfer and that the temperature of the beverage in the bottle remains the same and not phased from the temperature outside the bottle.
- Sun Feb 02, 2020 7:07 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Positive or negative work?
- Replies: 8
- Views: 261
Re: Positive or negative work?
it is negative if the system is expelling energy by doing work onto the surroundings. It is positive if the surroundings are doing work on the system
- Sun Feb 02, 2020 7:05 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Constant Volume and Pressure
- Replies: 7
- Views: 248
Re: Constant Volume and Pressure
it means the volume or pressure will not change during the reaction. In the problems, it usually either specifies that it is constant, or you have to infer that based off what information they give you and the values they list
- Sun Feb 02, 2020 7:04 pm
- Forum: General Science Questions
- Topic: Test 1: Sig Figs
- Replies: 7
- Views: 346
Re: Test 1: Sig Figs
I would assume they count, and I think you have to base it off how many sig figs the problem gives you. I believe its the lowest amount of sig figs the problem gives you and you match yours with those given
- Sun Feb 02, 2020 7:01 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: extensive property
- Replies: 12
- Views: 604
Re: extensive property
Personally, what helped me memorize it was that i just learned to memorize the association of mass and volume to the word extensive, so when I thought of extensive I would remember mass and volume. so when I think of mass and volume I remember they depend on the amount of material
- Sun Jan 19, 2020 6:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Titration
- Replies: 3
- Views: 117
Re: Titration
I don't think he said it's going to be on the test
- Sun Jan 19, 2020 6:47 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Test 1 Acids and Bases Topic
- Replies: 9
- Views: 490
Re: Test 1 Acids and Bases Topic
Ritu Gaikwad 2E wrote:For the acids and bases, do we have to memorize the list of strong acids and bases for future tests and exams?
i'm not sure if we are required to memorize them, but it is usually good to know.
- Sun Jan 19, 2020 6:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentrations
- Replies: 12
- Views: 384
Re: Concentrations
I'm not sure if this answers your question but if the temperature is the same the concentration does not change the equilibrium constant (k). However, if you change the temperature it does change the equilibrium constant. So temperature is the only thing that can affect the the equilibrium constant...
- Sun Jan 19, 2020 6:40 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Why is K unitless?
- Replies: 10
- Views: 562
Re: Why is K unitless?
because its concentrations over concentrations, the M cancels out and its also just a ratio of the concentrations
- Fri Jan 17, 2020 9:32 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kc & Kp
- Replies: 12
- Views: 281
Re: Kc & Kp
Elizabeth Harty 1A wrote:Are the calculations the same regardless of whether its concentration of partial pressure?
i believe the calculations are the same so i think its okay as long as you account for any differences in units or something
- Sun Dec 01, 2019 10:20 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: Bases
- Replies: 4
- Views: 670
Re: Bases
bases also react with acids on human skin, which influences how they feel
- Sun Dec 01, 2019 10:13 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acids Vs. Bases
- Replies: 11
- Views: 839
Re: Acids Vs. Bases
https://www.khanacademy.org/science/org ... sted-lowry
I found this video to be helpful with distinguishing the two
I found this video to be helpful with distinguishing the two
- Sun Dec 01, 2019 8:18 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 4
- Views: 286
Re: Coordination Number
yes so you would count the number of bonds to figure out the coordination number of the central atom
- Sun Dec 01, 2019 8:10 pm
- Forum: *Stereochemistry
- Topic: What's a stereocenter?
- Replies: 5
- Views: 2205
Re: What's a stereocenter?
I am not sure but if it is on the final I doubt it'd be very important. As long as you remember that basic definition
- Sun Dec 01, 2019 8:03 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Oxidation Number
- Replies: 9
- Views: 731
Re: Oxidation Number
the safe way would be to include it always, especially on an exam
- Sun Nov 24, 2019 9:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: H3O+
- Replies: 12
- Views: 26099
Re: H3O+
its classification as tetrahedral is based off of it having 4 regions of density, as it will have a lone pair on the O as just the three hydrogrens would not satisfy oxygen
- Sun Nov 24, 2019 8:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 4
- Views: 180
Re: Polarity
if they have the same pull opposite of each other, like 4 of the same atoms surrounding a central atom, they will cancel out.
- Sun Nov 24, 2019 8:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Intermolecular forces
- Replies: 5
- Views: 337
Re: Intermolecular forces
The three major types of intermolecular interactions are London dispersion forces, dipole–dipole interactions and hydrogen bonds
- Sun Nov 24, 2019 8:41 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent vs linear
- Replies: 56
- Views: 4032
Re: Bent vs linear
linear will have no lone pairs so the bond angle will not be altered
- Sun Nov 24, 2019 8:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs on Cenrtral Atom
- Replies: 11
- Views: 581
Re: Lone Pairs on Cenrtral Atom
the lone pairs will not attract the other bonds and actually repel them so bond angle decreases
- Sun Nov 17, 2019 10:30 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: shape
- Replies: 3
- Views: 219
Re: shape
I think there would only be one, but maybe there are exceptions to where there could technically be more than one
- Sun Nov 17, 2019 9:43 pm
- Forum: Hybridization
- Topic: Specifics
- Replies: 3
- Views: 243
Re: Specifics
so far, I do nt believe we should but perhaps later on that will be the case.
- Sun Nov 17, 2019 9:41 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Lone Pairs
- Replies: 5
- Views: 861
Re: Lone Pairs
A lone pair of electrons at a central atom always tries to repel bonded pair of electrons. So, the bonds are displaced slightly, which leads to a decrease of bond angle.
- Sun Nov 17, 2019 9:00 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Simpler Terms
- Replies: 4
- Views: 722
Re: Simpler Terms
Paramagnetic compounds are attracted to magnetic fields, they have unpaired electrons. diamagnetic compounds are repelled from magnetic fields. their electrons all have paired spins.
- Sun Nov 17, 2019 8:53 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Covalent Character
- Replies: 3
- Views: 1965
Re: Covalent Character
Mg and Br have a smaller difference in electronegativity
- Sun Nov 17, 2019 8:28 pm
- Forum: Hybridization
- Topic: Test 2 Topics
- Replies: 11
- Views: 660
Re: Test 2 Topics
it is everything from the midterm onwards
- Sun Nov 17, 2019 8:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shapes
- Replies: 7
- Views: 414
Re: Shapes
there is linear, trigonal planar, bent, tetrahedral, trigonal pyramidal, trigonal bypyramidal, seesaw, t shaped, octahedral, square pyramidal, square planar
- Sun Nov 17, 2019 7:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining a VSEPR model
- Replies: 6
- Views: 375
Re: Determining a VSEPR model
I don't believe it matters, as long as the number of regions of electron density is accurate
- Sun Nov 17, 2019 7:42 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 2
- Replies: 19
- Views: 812
Re: Test 2
it is definitely safe to draw the most stable lewis structure to help with that.
- Sun Nov 17, 2019 7:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Influence on Molecular Shape
- Replies: 4
- Views: 190
Re: Influence on Molecular Shape
bond angle is effected by lone pairs on the central atom. the presence of a lone pair decreases bond angle.
- Sun Nov 03, 2019 8:15 pm
- Forum: Hybridization
- Topic: Electrons
- Replies: 13
- Views: 1222
Re: Electrons
to moves to the next higher energy orbital because it is excited
- Sun Nov 03, 2019 7:58 pm
- Forum: Ionic & Covalent Bonds
- Topic: In what order do electrons get removed?
- Replies: 7
- Views: 35485
Re: In what order do electrons get removed?
valence electrons are removed from the highest energy level first
- Sun Nov 03, 2019 7:49 pm
- Forum: Bond Lengths & Energies
- Topic: Bond energies
- Replies: 4
- Views: 206
Re: Bond energies
I'm not sure if you mean bond strength, but if you do, single bonds are the weakest. Double bonds are stronger and triple are the strongest
- Sun Nov 03, 2019 7:44 pm
- Forum: Bond Lengths & Energies
- Topic: Ions for the Midterm
- Replies: 3
- Views: 195
Re: Ions for the Midterm
I believe we don't have to memorize those random ions. Unless we see them a lot, I doubt we'd have to memorize them
- Sun Nov 03, 2019 7:42 pm
- Forum: Bond Lengths & Energies
- Topic: Strength of Bonds
- Replies: 16
- Views: 622
Re: Strength of Bonds
longer bonds are weaker and shorter bonds are stronger.
- Sun Oct 27, 2019 9:02 pm
- Forum: Bond Lengths & Energies
- Topic: bond lengths for single or double bonds
- Replies: 7
- Views: 410
Re: bond lengths for single or double bonds
not sure if it varies, but generally, the stronger the bond, the shorter the length. So a triple would be shorter than a double and a double would be shorter than a single
- Sun Oct 27, 2019 8:55 pm
- Forum: Ionic & Covalent Bonds
- Topic: Double bond placement
- Replies: 15
- Views: 796
Re: Double bond placement
they can be placed as long as they satisfy the octet rule but you should try drawing a structure with zero formal charge because it will be most stable. the double/triple bonds will help getting the formal charge to zero
- Sun Oct 27, 2019 8:52 pm
- Forum: Lewis Structures
- Topic: Figuring out When/How to Add a Double Bond
- Replies: 3
- Views: 98
Re: Figuring out When/How to Add a Double Bond
you would use a double or triple bond to satisfy the number of valence e- each element needs. also they are used to get the formal charge to zero
- Sun Oct 27, 2019 8:48 pm
- Forum: Lewis Structures
- Topic: Lone Pairs
- Replies: 12
- Views: 538
Re: Lone Pairs
lone pairs are going to be two single dots next to each other that are not bonded to anything, thus making them lone pairs.
- Sun Oct 27, 2019 8:46 pm
- Forum: Electronegativity
- Topic: Electronegativity
- Replies: 14
- Views: 596
Re: Electronegativity
Jorge Ramirez_4H wrote:Is electronegativity important when doing electron configurations?
for only electron configurations, it is not really useful. knowing what it is and its trend is more useful for bonds and lewis structures
- Sun Oct 20, 2019 8:54 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: how to prepare
- Replies: 22
- Views: 813
Re: how to prepare
personally, reading a textbook does not help me, so I always recommend youtube videos. It is good to know what formulas you do not need to memorize, so you can watch these videos over and over again while focusing on learning to apply the formulas and conversions.
- Sun Oct 20, 2019 8:47 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Hund's rule and Pauli Exclusion Principle
- Replies: 14
- Views: 755
Re: Hund's rule and Pauli Exclusion Principle
the relationship would be that they are both necessary in understanding how filling up the orbitals works. You can start by using Hund's rule to make sure each orbital has an electron before doubling up. Then, you can use Pauli's principle to arrange it so each orbital has one up and one down.
- Sun Oct 20, 2019 8:37 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Short Hand
- Replies: 11
- Views: 397
Re: Short Hand
since the configurations continue to get longer and longer, you can start the longer configurations with an abbreviation of the noble gas that comes before it. The noble gases are the column all the way to the right and they have full outer shells, which makes it possible for us to use them when doi...
- Sun Oct 20, 2019 7:45 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Spin up and spin down
- Replies: 13
- Views: 1055
Re: Spin up and spin down
Since this is only 14a I dont think we should know much more about the details of it than he explains in lecture. I think main thing to remember is the -1/2 and +1/2 numbers and that it is always one down and one up in an orbital
- Sun Oct 20, 2019 7:37 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbitals
- Replies: 8
- Views: 269
Re: Orbitals
ATingin_3I wrote:Why is it that each orbital can only hold 2 electrons max?
I suppose its just a given that is defined by the Pauli exclusion rule, along with how the two electrons must have different spins
- Sun Oct 13, 2019 7:41 pm
- Forum: Properties of Light
- Topic: Photoelectric Effect
- Replies: 7
- Views: 326
Re: Photoelectric Effect
in vacuums, we don't see the same interferences as we would in realistic settings
- Sun Oct 13, 2019 7:38 pm
- Forum: Properties of Electrons
- Topic: Mass of Electrons
- Replies: 6
- Views: 277
Re: Mass of Electrons
I believe it is always the same and it was a constant listed in the test sheet last week.
- Sun Oct 13, 2019 7:30 pm
- Forum: DeBroglie Equation
- Topic: Diffraction patterns
- Replies: 4
- Views: 188
Re: Diffraction patterns
I like to remember that two in phase waves leads to constructive and two out of phase lead to destructive. What helps me is drawing out what in phase/out of phase waves would look like to visualize how it would lead to destructive or constructive.
- Sun Oct 13, 2019 7:21 pm
- Forum: Properties of Light
- Topic: Speed of light.
- Replies: 10
- Views: 270
Re: Speed of light.
yes and it might be one of the constants listed on the test sheets
- Sun Oct 13, 2019 7:15 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 17473
Re: Test 1 [ENDORSED]
Jasmine Kim 3H wrote:If we need to use the answer of one question for the next question and our answer for the first question is wrong, will we not get full credit for the second, even if our calculations on the second were correct?
not entirely sure, but i believe you should still get some points for accurate process
- Mon Oct 07, 2019 11:57 pm
- Forum: Empirical & Molecular Formulas
- Topic: Polyatomic Ions/Naming Compounds
- Replies: 6
- Views: 574
Re: Polyatomic Ions/Naming Compounds
705327693 wrote:Do we have to know this stuff for the first test?
I would like to assume it wouldn't be directly tested on the first test but more than likely it would be necessary later on in the course
- Mon Oct 07, 2019 11:54 pm
- Forum: Balancing Chemical Reactions
- Topic: When are atoms lost or created?
- Replies: 14
- Views: 1721
Re: When are atoms lost or created?
Its always good to remember mass is neither created or destroyed. However it can be confusing since he mentioned something about atoms being destroyed in nuclear reactions, but pretty sure we won't see that in this class
- Mon Oct 07, 2019 11:47 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 17473
Re: Test 1 [ENDORSED]
A bluebook is not mentioned in the syllabus for the first test
- Mon Oct 07, 2019 11:44 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student - Part II [ENDORSED]
- Replies: 298
- Views: 244799
Re: Advice from a Medical Student - Part II [ENDORSED]
It was so great to hear your story. Often times it feels like we should know exactly what we want to do with our careers but it is nice to see an example of success while not knowing exactly each step going forward.