Search found 114 matches
- Sat Mar 14, 2020 1:21 pm
- Forum: General Rate Laws
- Topic: Factors Affecting k
- Replies: 83
- Views: 6923
Re: Factors Affecting k
Also, k is a intensive property, not an extensive property, right?
- Sat Mar 14, 2020 1:17 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: arrhenius equation
- Replies: 4
- Views: 353
Re: arrhenius equation
And what is the A again?
(I’m sorry I always forget)
(I’m sorry I always forget)
- Sat Mar 14, 2020 1:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: take home FINAL DEADLINE
- Replies: 15
- Views: 1153
Re: take home FINAL DEADLINE
He said he’d send out info today but it’s already 4 pm. Have you guys received anything?
- Sat Mar 14, 2020 1:12 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final- general questions
- Replies: 12
- Views: 965
Re: Final- general questions
Same, I’m really nervous I’m going to miss an email and then get an f or something because I missed the time.
- Sun Mar 08, 2020 5:19 pm
- Forum: General Rate Laws
- Topic: affect of temperature on K
- Replies: 4
- Views: 353
Re: affect of temperature on K
@ Daniel Chen 2L , I am also curious about that... Something else that confused me was when the textbook would say the temperature that did not seem like a standard temp, but then would say what k equals. I'm pretty sure that I should just use the k and note that the temp was only given for context....
- Sun Mar 08, 2020 5:15 pm
- Forum: Second Order Reactions
- Topic: Non-integer orders
- Replies: 7
- Views: 1179
Re: Non-integer orders
Is there a certain amount within an integer that we should get in order to assume it counts for experimental error and round it?
Like, say on the exam I get n=1.75. Is that close enough to round to 2? If not, what is the general cutoff for being close enough?
Like, say on the exam I get n=1.75. Is that close enough to round to 2? If not, what is the general cutoff for being close enough?
- Sun Mar 08, 2020 5:12 pm
- Forum: Zero Order Reactions
- Topic: Zero Order reaction rate constant
- Replies: 8
- Views: 507
Re: Zero Order reaction rate constant
And what is the units for the rate constant of the zero order rxn?
- Sun Mar 08, 2020 5:11 pm
- Forum: First Order Reactions
- Topic: rate constants
- Replies: 30
- Views: 1563
Re: rate constants
Also, will we ever get a graph with a curve of lnA/t even if we have the correct order reaction? I thought I saw an example like that in the book but I was confused.
- Sun Mar 08, 2020 5:10 pm
- Forum: First Order Reactions
- Topic: rate constants
- Replies: 30
- Views: 1563
Re: rate constants
In what case would we ever get a negative rate constant?
- Sun Mar 08, 2020 5:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Review Sessions
- Replies: 6
- Views: 390
Re: Final Review Sessions
Hi! Have you heard about the final review that Lyndon and Matt usually do?
- Fri Feb 28, 2020 11:04 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.39 [ENDORSED]
- Replies: 2
- Views: 465
Re: 14.39 [ENDORSED]
I am having trouble finding the n value in part b. I keep getting 10 or 5. Do you know how to do this part? Thank you!
- Fri Feb 28, 2020 12:52 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.3
- Replies: 3
- Views: 471
Re: 6M.3
Why is the anode on the right? I thought galvanic cells have positive overall cell potentials?
- Fri Feb 28, 2020 12:34 pm
- Forum: Balancing Redox Reactions
- Topic: Homework 6M1
- Replies: 5
- Views: 474
Re: Homework 6M1
A positive cell potential means that the cathode is the electrode on the right of the cell diagram. A negative cell potential means that the cathode is the electrode on the left side of the cell diagram. Since the problem states that the cell potential was found to be negative, then this means that...
- Thu Feb 27, 2020 8:41 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Drawing Cell Diagram
- Replies: 7
- Views: 522
Re: Drawing Cell Diagram
I didn't realize that the cell diagram does not represent the order of the molecules in the reaction. But a rule I can follow is that the side being oxidized is the anode, and whatever solid that is on that side should be on the side of the anode, right? And that if there is no solid then the electr...
- Thu Feb 27, 2020 8:34 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: How to tell which is anode/cathode based on standard reduction potentials E
- Replies: 5
- Views: 400
Re: How to tell which is anode/cathode based on standard reduction potentials E
Thank you ThomasNguyen_Dis1H! That was really helpful. I was reminded of those two types of cells (galvantic and electrolytic). There is also a concentration cell in which the cell potential is zero because the standard reduction potentials are equal.
- Thu Feb 27, 2020 8:20 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Why do we tend to measure reduction potential instead of oxidation potential? [ENDORSED]
- Replies: 2
- Views: 530
Re: Why do we tend to measure reduction potential instead of oxidation potential? [ENDORSED]
Thank you.
On a related note, why do both the half reactions cell potential of the oxidation of 2Cl- and the reduction of Cl2 equal the same number? In my discussion today we did a problem like that and the cell potentials were not opposite signs of each other.
On a related note, why do both the half reactions cell potential of the oxidation of 2Cl- and the reduction of Cl2 equal the same number? In my discussion today we did a problem like that and the cell potentials were not opposite signs of each other.
- Thu Feb 27, 2020 8:17 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Potentials on Test 2
- Replies: 3
- Views: 266
Re: Cell Potentials on Test 2
Yeah, I am pretty sure we'll be given all those values, we don't need to memorize it.
- Thu Feb 27, 2020 8:15 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Where to find Ecell values
- Replies: 15
- Views: 916
Re: Where to find Ecell values
My TA talks about the "e-chem series" and how if the value is higher then it has more oxidizing/reducing power, but what is the e-chem series?
- Wed Feb 12, 2020 4:17 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Pizza Rolls 6 (pt.1)
- Replies: 10
- Views: 769
Re: Pizza Rolls 6 (pt.1)
We are never given T so we can't solve the last step for w and therefore q.
- Wed Feb 12, 2020 12:15 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Heat Capacity for Enthalpy
- Replies: 2
- Views: 204
Re: Heat Capacity for Enthalpy
And make sure you're using the same unit for Joules/Kilojoules! :)
The textbook switches it sometimes and it got me a couple times.
The textbook switches it sometimes and it got me a couple times.
- Tue Feb 11, 2020 11:10 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 8.51 The enthalpy of formation of trinitrotoluene (TNT)
- Replies: 5
- Views: 11133
Re: 8.51 The enthalpy of formation of trinitrotoluene (TNT)
Thank you! This helped so much!
- Tue Feb 11, 2020 10:58 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Enthalpy versus heat
- Replies: 11
- Views: 590
Re: Enthalpy versus heat
And to further clarify, standard enthalpy for a reaction and heat needed for that reaction are the same, right? As long as the q is for the same number of moles at the delta H is for.
Because I noticed that standard enthalpy only has the units of kJ (or J). (Not kJ per mol)
Because I noticed that standard enthalpy only has the units of kJ (or J). (Not kJ per mol)
- Tue Feb 11, 2020 10:55 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Question 4B.3
- Replies: 5
- Views: 346
Re: Question 4B.3
I feel you, it seems like there are so many typos in the textbook I don't really trust the answer key that much.
- Tue Feb 11, 2020 10:53 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Reason for decrease in entropy
- Replies: 5
- Views: 316
Re: Reason for decrease in entropy
Thank you, that helps a lot! :)
But do you know what I mean about how in high school we learned that the entropy of the universe is always increasing? Maybe I misunderstood that when we originally learned that.
But do you know what I mean about how in high school we learned that the entropy of the universe is always increasing? Maybe I misunderstood that when we originally learned that.
- Tue Feb 11, 2020 10:52 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Homework Problem 8.47
- Replies: 3
- Views: 2650
Re: Homework Problem 8.47
It is because it says the work is done on the system. Therefore the system is gaining that energy and the surroundings are losing it.
For example, when we pump a bike tire, we (surroundings) are doing work on the tire (system), which is why we feel tired. We are losing delta U
For example, when we pump a bike tire, we (surroundings) are doing work on the tire (system), which is why we feel tired. We are losing delta U
- Sun Feb 09, 2020 12:33 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: How is heat capacity a state function?
- Replies: 3
- Views: 3839
Re: How is heat capacity a state function?
Is heat capacity a state function? I thought that if it relies on the change in heat/transfer of heat then it is not a state function?
- Sat Feb 08, 2020 6:21 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Delta U at Constant V/P
- Replies: 4
- Views: 232
Re: Delta U at Constant V/P
I'm kind of confused, what does -P delta V equal?
Thank you!
Thank you!
- Sat Feb 08, 2020 6:11 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Degeneracy
- Replies: 9
- Views: 373
Re: Degeneracy
Isn't degeneracy used for the entropy equation (S=kBlnW)?
- Sat Feb 08, 2020 6:01 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy of transition
- Replies: 8
- Views: 440
Re: Entropy of transition
Thank you, Ariel! That helped a lot.
- Sat Feb 08, 2020 5:57 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Microstates
- Replies: 6
- Views: 276
Re: Microstates
What is a microstate?
(I'm sorry, I don't remember this part of the lecture!)
(I'm sorry, I don't remember this part of the lecture!)
- Sat Feb 08, 2020 5:55 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Reason for decrease in entropy
- Replies: 5
- Views: 316
Reason for decrease in entropy
Why would entropy decrease in the universe? I thought there was a rule we learned in high school that the entropy of the universe is always increasing.
Also, why would entropy decrease in general?
Also, why would entropy decrease in general?
- Fri Feb 07, 2020 3:20 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy Decreasing, Temperature Increasing
- Replies: 6
- Views: 181
Re: Entropy Decreasing, Temperature Increasing
Why/when does entropy have a negative value? I thought that entropy only increases? Or is that only for the entire universe?
- Tue Jan 28, 2020 7:56 pm
- Forum: Phase Changes & Related Calculations
- Topic: Why does steam cause burns?
- Replies: 29
- Views: 1337
Re: Why does steam cause burns?
This makes me really scared of steam now!
- Tue Jan 28, 2020 7:55 pm
- Forum: Phase Changes & Related Calculations
- Topic: Cv and Cp
- Replies: 9
- Views: 458
Re: Cv and Cp
Do solids and liquids only use C? Or do they use Cv? I'm pretty sure they don't use Cp.
- Tue Jan 28, 2020 7:52 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: q vs. delta H
- Replies: 6
- Views: 310
Re: q vs. delta H
And -q means heat out of the system and into the surroundings, right?
- Tue Jan 28, 2020 7:51 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 11
- Views: 308
Re: Bond Enthalpies
Is the table we find this in the textbook or is there a general one online that is the same?
- Tue Jan 28, 2020 7:47 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: reaction enthalpy
- Replies: 14
- Views: 529
Re: reaction enthalpy
This confuses me too because its not like it gives off energy to create a bond, right? Unless it is saying it gives off energy to break a bond.
- Tue Jan 28, 2020 7:45 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: reversible and irreversible processes
- Replies: 9
- Views: 1557
Re: reversible and irreversible processes
What are the implications of these reversible/irreversible processes?
- Thu Jan 23, 2020 8:14 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Hw problem 5.35 help
- Replies: 3
- Views: 167
Re: Hw problem 5.35 help
The final vertical pieces of data show the reaction at equilibrium, right?
- Thu Jan 23, 2020 8:13 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: What is this?
- Replies: 23
- Views: 1510
Re: What is this?
This principle describes the movement of the reaction a certain way to make it try to reach equilibrium.
- Thu Jan 23, 2020 8:06 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Changing K
- Replies: 13
- Views: 541
Re: Changing K
Since changing temperature is the only thing that affects changing K, it becomes a different reaction, right?
- Thu Jan 23, 2020 8:00 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Inert Gas
- Replies: 6
- Views: 216
Re: Inert Gas
Similarly, why would adding a halogen be special in shifting/not shifting a reaction a certain way?
- Thu Jan 23, 2020 7:56 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: suggestions
- Replies: 16
- Views: 597
Re: suggestions
On this note, do you have suggestions on how to do more practice problems that are relevant and give you the answers so you can check?
- Thu Jan 23, 2020 7:55 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: pKa and pKb
- Replies: 17
- Views: 948
Re: pKa and pKb
@stephaniekim2k , That is a really great way of explaining it, thank you! It helped me a lot!
- Thu Jan 23, 2020 7:53 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Endothermic Reaction.
- Replies: 7
- Views: 309
Re: Endothermic Reaction.
Just so I am clear, the positive or negative enthalpy represents the object/solution/system itself either losing or gaining heat, not its surroundings, right?
- Thu Jan 23, 2020 7:52 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: definition of a buffer
- Replies: 8
- Views: 450
Re: definition of a buffer
Also, I'm not sure about the presence of a salt when making a buffer. Can someone please explain that to me? Thanks!
- Thu Jan 23, 2020 7:41 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: pKa to Kb
- Replies: 12
- Views: 674
Re: pKa to Kb
Also, I'm forgetting the concentration equation for pKb, can someone help me with that? Thanks!
- Thu Jan 23, 2020 7:37 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K value
- Replies: 7
- Views: 243
Re: K value
Do we exclude the x value even if K is a little bit smaller than 10^-3? Like if 10^3.4?
- Thu Jan 23, 2020 7:31 pm
- Forum: Ideal Gases
- Topic: When does the Ideal Gas Law Fail?
- Replies: 7
- Views: 1453
Re: When does the Ideal Gas Law Fail?
Also, how often do the circumstances exist when it fails?
- Thu Jan 23, 2020 7:30 pm
- Forum: Ideal Gases
- Topic: When does the Ideal Gas Law Fail?
- Replies: 7
- Views: 1453
Re: When does the Ideal Gas Law Fail?
When it fails, how much does it differ than it is supposed to?
- Thu Jan 23, 2020 7:29 pm
- Forum: Ideal Gases
- Topic: Ideal Gas meaning
- Replies: 7
- Views: 421
Re: Ideal Gas meaning
That's a good question, I've been wondering the same thing! Thank you!
- Thu Jan 23, 2020 7:28 pm
- Forum: Ideal Gases
- Topic: solids and K
- Replies: 8
- Views: 375
Re: solids and K
For not including liquids and solids, what if there is H2O as a gas? When I see that I'm worried that there is a typo.
Also, I've noticed a few typos in the textbook so far about figure numbers which is frustrating.
Also, I've noticed a few typos in the textbook so far about figure numbers which is frustrating.
- Thu Jan 23, 2020 7:23 pm
- Forum: Ideal Gases
- Topic: Acid and Bases
- Replies: 16
- Views: 603
Re: Acid and Bases
It's fine to have a negative pH sometimes, right? I got it once on a homework problem and I was worried I was doing it wrong.
- Thu Jan 23, 2020 7:20 pm
- Forum: Ideal Gases
- Topic: Acid and Bases
- Replies: 16
- Views: 603
Re: Acid and Bases
I had a hard time understanding how the strength of weak acids is determined. Sometimes we solve problems for weak acid solutions, but their pH is about 3 or 4. Are we not able to correlate low pH with strength of acidity?
- Thu Jan 23, 2020 7:18 pm
- Forum: Ideal Gases
- Topic: Acid and Bases
- Replies: 16
- Views: 603
Re: Acid and Bases
Is the pKa value on the same scale as the pH scale?
- Thu Jan 23, 2020 7:16 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 5564
Re: Kc vs Kp
From what I understand, pressures can be used with Kc or Kp but concentrations can only be used with Kc. Right?
- Tue Dec 03, 2019 9:12 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: pKa and electronegativity
- Replies: 2
- Views: 172
Re: pKa and electronegativity
Thank you! This is very helpful!
- Tue Dec 03, 2019 9:06 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Value of Kw?
- Replies: 4
- Views: 630
Re: Value of Kw?
I don't remember learning this, will it be on the final?
- Tue Dec 03, 2019 9:04 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: pKa vs Ka
- Replies: 6
- Views: 515
Re: pKa vs Ka
Ka will always be given, right? We don't have to memorize any of them, right?
- Tue Dec 03, 2019 9:03 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: pKa vs Ka
- Replies: 6
- Views: 515
Re: pKa vs Ka
Ka will always be given, right? We don't have to memorize any of them, right?
- Tue Dec 03, 2019 8:56 pm
- Forum: Polyprotic Acids & Bases
- Topic: How can you tell
- Replies: 18
- Views: 1068
Re: How can you tell
Therefore, can only acids be polyprotic?
Because if a base is polyprotic doesn't that mean we are referring to its acidic properties of being able to give off protons so its an acid?
Because if a base is polyprotic doesn't that mean we are referring to its acidic properties of being able to give off protons so its an acid?
- Tue Dec 03, 2019 8:54 pm
- Forum: Hybridization
- Topic: Triple Bond Hybridization
- Replies: 4
- Views: 217
Re: Triple Bond Hybridization
I'm kind of confused now...bond number (like triple/double/single) matters when dealing with hybridization?
- Tue Dec 03, 2019 8:49 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 6
- Views: 208
Re: Coordination Number
So, just to be clear, the coordination number is always the same as the areas of high electron population, right?
- Tue Dec 03, 2019 8:48 pm
- Forum: Naming
- Topic: Naming Compounds with Two Ligands
- Replies: 3
- Views: 210
Re: Naming Compounds with Two Ligands
Thank you! This is very helpful!
- Tue Dec 03, 2019 8:29 pm
- Forum: Naming
- Topic: Iron vs Ferrate
- Replies: 5
- Views: 201
Re: Iron vs Ferrate
Thank you all! This is very helpful
- Tue Dec 03, 2019 8:25 pm
- Forum: Biological Examples
- Topic: Hydrogen Bonding sites
- Replies: 11
- Views: 819
Re: Hydrogen Bonding sites
In organic molecules where they don't show the carbon atoms or lone pairs, do we assume that there are lone pairs around Oxygens or hydrogens...?
- Tue Dec 03, 2019 8:21 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 3
- Views: 262
Re: Ligands
What is considered the list of common polyatomic ions?
- Tue Dec 03, 2019 8:17 pm
- Forum: Naming
- Topic: Memorizing
- Replies: 9
- Views: 634
Re: Memorizing
I notice that there are not really many review sessions for naming, is it less important you think for the final?
- Tue Dec 03, 2019 8:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final tips
- Replies: 19
- Views: 1116
Re: Final tips
Thank you guys for all of these tips! I wonder if also reading the book will help!
- Tue Dec 03, 2019 8:10 pm
- Forum: Student Social/Study Group
- Topic: Preparing for the final
- Replies: 25
- Views: 1316
Re: Preparing for the final
Also, I wish the review sessions weren't late on a Friday night, those times are difficult for a commuter student but I have no other choice because I need to get a good grade..
- Tue Dec 03, 2019 8:08 pm
- Forum: Student Social/Study Group
- Topic: Preparing for the final
- Replies: 25
- Views: 1316
Re: Preparing for the final
I'm still confused on how we find out about step up sessions. Is it on chem community?
- Mon Nov 18, 2019 11:46 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Sigma and Pi Bonds
- Replies: 33
- Views: 1765
Re: Sigma and Pi Bonds
It seems like all we need to know for sigma/pi bonds for Test 2 is the definition and properties of sigma/pi bonds and what one/two/three bonds mean, is that right?
Thanks!
Thanks!
- Mon Nov 18, 2019 11:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AXE formula
- Replies: 9
- Views: 574
Re: AXE formula
Hi! What's the shape of the AX2E VSEPR formula? I think it is bent or trigonal planar, but I'm not sure.
- Mon Nov 18, 2019 11:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How to know which angles are smaller
- Replies: 8
- Views: 519
Re: How to know which angles are smaller
Also, what are the angles of AX5E (which I think is a square pyramidal shape)?
- Mon Nov 18, 2019 11:42 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How to know which angles are smaller
- Replies: 8
- Views: 519
Re: How to know which angles are smaller
What are the angles of the AX2E VSEPR formula? I think this is either a bent shape or trigonal planar but I'm not sure
- Mon Nov 18, 2019 11:41 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: seesaw
- Replies: 5
- Views: 472
Re: seesaw
Hi! I think it is less than 90 degrees and 120 degrees.
- Mon Nov 18, 2019 11:40 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 4
- Views: 167
Re: Hybridization
Do all molecules use hybridized orbitals?
- Wed Nov 13, 2019 9:15 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Self Check 2E.3A
- Replies: 2
- Views: 123
Re: Self Check 2E.3A
The physical length that we show the triple bond does not matter when drawing, correct?
Thanks!
Thanks!
- Wed Nov 13, 2019 9:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone pairs of other atoms in molecule
- Replies: 3
- Views: 174
Re: Lone pairs of other atoms in molecule
I'm confused on the bond angle for T-shaped molecules with 2 lone pairs (and 3 bonding pairs)? Is it all less than 90?
Thanks!
Thanks!
- Wed Nov 13, 2019 9:05 pm
- Forum: Hybridization
- Topic: Pi vs Sigma Bonds
- Replies: 4
- Views: 345
Re: Pi vs Sigma Bonds
Therefore, less orbital overlap means a weaker bond?
Thanks!
Thanks!
- Wed Nov 13, 2019 9:04 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Intermolecular Forces vs Bonding???
- Replies: 5
- Views: 431
Re: Intermolecular Forces vs Bonding???
I'm still kind of confused on what a dipole moment is, can you help clarify?
- Wed Nov 13, 2019 9:03 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Determining Polarity
- Replies: 5
- Views: 434
Re: Determining Polarity
So, just to be sure, if it is a nonmetal + alkaline earth metal, it is polar molecule?
- Wed Nov 13, 2019 8:59 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: ion-dipole
- Replies: 2
- Views: 231
Re: ion-dipole
Do we need to know this for test 2?
- Wed Nov 13, 2019 8:58 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 2
- Replies: 15
- Views: 892
Re: Test 2
Up to what section in the textbook do we need to know for the test?
- Tue Nov 05, 2019 12:03 am
- Forum: Naming
- Topic: Naming Compounds (general question)
- Replies: 9
- Views: 478
Re: Naming Compounds (general question)
From the homework questions, it seems like we do. I'm worried that we do?
- Tue Nov 05, 2019 12:01 am
- Forum: Octet Exceptions
- Topic: Octet Rule exceptions
- Replies: 14
- Views: 897
Re: Octet Rule exceptions
Does anyone happen to know a fun/easy limerick to help memorize these?
Thanks!
Thanks!
- Tue Nov 05, 2019 12:01 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polar Covalent VS Ionic
- Replies: 11
- Views: 681
Re: Polar Covalent VS Ionic
This is really helpful, thank you. I'm also having trouble remembering if the ionic radius trend is different than atomic radius trend?
- Mon Nov 04, 2019 11:59 pm
- Forum: Dipole Moments
- Topic: Dipole moment calculation
- Replies: 2
- Views: 214
Re: Dipole moment calculation
Is there a formula we have to remember from the Dipole Moments section? I'm having trouble remembering.
- Mon Nov 04, 2019 11:58 pm
- Forum: Electronegativity
- Topic: Ionic or covalent?
- Replies: 17
- Views: 850
Re: Ionic or covalent?
Will we have to know the actual values of electronegativity to determine the minute differences? I assume probably not..
- Mon Oct 28, 2019 8:38 pm
- Forum: Octet Exceptions
- Topic: expanded octet?
- Replies: 9
- Views: 488
Re: expanded octet?
Were there any other elements perhaps in the same group way down the periodic table that have this exception other than those 3?
- Mon Oct 28, 2019 8:37 pm
- Forum: Electronegativity
- Topic: Electronegativity
- Replies: 14
- Views: 681
Re: Electronegativity
Daria Azizad 1K wrote:Electronegativity also decreases down the periodic table because as more shells are added, the more distant the positive nucleus is from other electrons it would attract; thus the electrostatic forces of attraction are weaker.
This helps so much! Thank you!
- Mon Oct 28, 2019 8:36 pm
- Forum: Electronegativity
- Topic: Fluorine's Electronegativity
- Replies: 6
- Views: 499
Re: Fluorine's Electronegativity
I don't really understand why elements in group 1 are not highly electronegative? Maybe I don't know the definition of electronegativity.
Also, why does electronegativity increase at you go up the groups?
Also, why does electronegativity increase at you go up the groups?
- Mon Oct 28, 2019 8:32 pm
- Forum: Octet Exceptions
- Topic: aufbau principle
- Replies: 8
- Views: 362
Re: aufbau principle
So when we draw the orbital configuration, does 4s go in a row below 3d if we are drawing it vertically with the higher energy levels going up?
- Mon Oct 28, 2019 8:30 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Purpose of the Equation
- Replies: 9
- Views: 403
Re: Purpose of the Equation
This is very helpful! Thank you!
And this is the same equation that Dr. Lavelle talked about how the velocity does not matter as much as the mass because when things are super small the differences in velocity don't make much of a difference?
(Sorry if that was worded very poorly!)
And this is the same equation that Dr. Lavelle talked about how the velocity does not matter as much as the mass because when things are super small the differences in velocity don't make much of a difference?
(Sorry if that was worded very poorly!)
- Mon Oct 28, 2019 8:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 10/28 Updates due to Fire [ENDORSED]
- Replies: 14
- Views: 1950
Re: 10/28 Updates due to Fire [ENDORSED]
Hi! I was also wondering when other midterm review sessions will be?
- Thu Oct 17, 2019 11:02 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Electron configurations
- Replies: 2
- Views: 144
Re: Electron configurations
Also, to what extent do you think we have to know and memorize the configurations? Do we have to be able to recognize each one up to the d orbitals?
- Thu Oct 17, 2019 10:55 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Magnetic Quantum number [ENDORSED]
- Replies: 4
- Views: 323
Re: Magnetic Quantum number [ENDORSED]
In the 3p subshell, where l=1, does this mean ml=0? Can ml=0?
- Thu Oct 17, 2019 10:50 am
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D 13 Homework [ENDORSED]
- Replies: 1
- Views: 169
1D 13 Homework [ENDORSED]
Hi! I am struggling a lot with 1D 13 b. How can be find the values of ml for an electron in the 6d subshell?
- Thu Oct 17, 2019 10:47 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Indeterminacy in Position [ENDORSED]
- Replies: 5
- Views: 268
Re: Indeterminacy in Position [ENDORSED]
So what distance does Δx represent on the electron level? The change in position between the first energy state and the second?
- Thu Oct 17, 2019 10:39 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Momentum
- Replies: 7
- Views: 340
Re: Momentum
I still don't understand why delta v is equal to the +/- number attached to the velocity when the velocity is given. It seems like it should be twice the value of the number that is +/-, but my TA told be explicitly that it is not.