Search found 114 matches

by Leila_4G
Sat Mar 14, 2020 1:21 pm
Forum: General Rate Laws
Topic: Factors Affecting k
Replies: 16
Views: 158

Re: Factors Affecting k

Also, k is a intensive property, not an extensive property, right?
by Leila_4G
Sat Mar 14, 2020 1:17 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: arrhenius equation
Replies: 4
Views: 38

Re: arrhenius equation

And what is the A again?
(I’m sorry I always forget)
by Leila_4G
Sat Mar 14, 2020 1:15 pm
Forum: Administrative Questions and Class Announcements
Topic: take home FINAL DEADLINE
Replies: 15
Views: 306

Re: take home FINAL DEADLINE

He said he’d send out info today but it’s already 4 pm. Have you guys received anything?
by Leila_4G
Sat Mar 14, 2020 1:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Final- general questions
Replies: 12
Views: 178

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.
by Leila_4G
Sun Mar 08, 2020 5:19 pm
Forum: General Rate Laws
Topic: affect of temperature on K
Replies: 4
Views: 57

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....
by Leila_4G
Sun Mar 08, 2020 5:15 pm
Forum: Second Order Reactions
Topic: Non-integer orders
Replies: 7
Views: 358

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?
by Leila_4G
Sun Mar 08, 2020 5:12 pm
Forum: Zero Order Reactions
Topic: Zero Order reaction rate constant
Replies: 8
Views: 63

Re: Zero Order reaction rate constant

And what is the units for the rate constant of the zero order rxn?
by Leila_4G
Sun Mar 08, 2020 5:11 pm
Forum: First Order Reactions
Topic: rate constants
Replies: 19
Views: 257

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.
by Leila_4G
Sun Mar 08, 2020 5:10 pm
Forum: First Order Reactions
Topic: rate constants
Replies: 19
Views: 257

Re: rate constants

In what case would we ever get a negative rate constant?
by Leila_4G
Sun Mar 08, 2020 5:09 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Review Sessions
Replies: 6
Views: 68

Re: Final Review Sessions

Hi! Have you heard about the final review that Lyndon and Matt usually do?
by Leila_4G
Fri Feb 28, 2020 11:04 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.39 [ENDORSED]
Replies: 2
Views: 197

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!
by Leila_4G
Fri Feb 28, 2020 12:52 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6M.3
Replies: 3
Views: 85

Re: 6M.3

Why is the anode on the right? I thought galvanic cells have positive overall cell potentials?
by Leila_4G
Fri Feb 28, 2020 12:34 pm
Forum: Balancing Redox Reactions
Topic: Homework 6M1
Replies: 5
Views: 109

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...
by Leila_4G
Thu Feb 27, 2020 8:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Drawing Cell Diagram
Replies: 7
Views: 93

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...
by Leila_4G
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: 26

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.
by Leila_4G
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: 291

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.
by Leila_4G
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: 33

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.
by Leila_4G
Thu Feb 27, 2020 8:15 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Where to find Ecell values
Replies: 15
Views: 141

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?
by Leila_4G
Wed Feb 12, 2020 4:17 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Pizza Rolls 6 (pt.1)
Replies: 10
Views: 227

Re: Pizza Rolls 6 (pt.1)

We are never given T so we can't solve the last step for w and therefore q.
by Leila_4G
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: 43

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.
by Leila_4G
Tue Feb 11, 2020 10:58 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Enthalpy versus heat
Replies: 11
Views: 114

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)
by Leila_4G
Tue Feb 11, 2020 10:55 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Question 4B.3
Replies: 5
Views: 59

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.
by Leila_4G
Tue Feb 11, 2020 10:53 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Reason for decrease in entropy
Replies: 5
Views: 64

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.
by Leila_4G
Tue Feb 11, 2020 10:52 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Homework Problem 8.47
Replies: 2
Views: 1276

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
by Leila_4G
Sun Feb 09, 2020 12:33 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: How is heat capacity a state function?
Replies: 3
Views: 2133

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?
by Leila_4G
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: 57

Re: Delta U at Constant V/P

I'm kind of confused, what does -P delta V equal?
Thank you!
by Leila_4G
Sat Feb 08, 2020 6:11 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Degeneracy
Replies: 9
Views: 114

Re: Degeneracy

Isn't degeneracy used for the entropy equation (S=kBlnW)?
by Leila_4G
Sat Feb 08, 2020 6:01 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy of transition
Replies: 8
Views: 87

Re: Entropy of transition

Thank you, Ariel! That helped a lot.
by Leila_4G
Sat Feb 08, 2020 5:57 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Microstates
Replies: 6
Views: 62

Re: Microstates

What is a microstate?
(I'm sorry, I don't remember this part of the lecture!)
by Leila_4G
Sat Feb 08, 2020 5:55 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Reason for decrease in entropy
Replies: 5
Views: 64

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?
by Leila_4G
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: 57

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?
by Leila_4G
Tue Jan 28, 2020 7:56 pm
Forum: Phase Changes & Related Calculations
Topic: Why does steam cause burns?
Replies: 29
Views: 256

Re: Why does steam cause burns?

This makes me really scared of steam now!
by Leila_4G
Tue Jan 28, 2020 7:55 pm
Forum: Phase Changes & Related Calculations
Topic: Cv and Cp
Replies: 9
Views: 93

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.
by Leila_4G
Tue Jan 28, 2020 7:52 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: q vs. delta H
Replies: 6
Views: 107

Re: q vs. delta H

And -q means heat out of the system and into the surroundings, right?
by Leila_4G
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: 68

Re: Bond Enthalpies

Is the table we find this in the textbook or is there a general one online that is the same?
by Leila_4G
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: 91

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.
by Leila_4G
Tue Jan 28, 2020 7:45 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: reversible and irreversible processes
Replies: 9
Views: 475

Re: reversible and irreversible processes

What are the implications of these reversible/irreversible processes?
by Leila_4G
Thu Jan 23, 2020 8:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw problem 5.35 help
Replies: 3
Views: 45

Re: Hw problem 5.35 help

The final vertical pieces of data show the reaction at equilibrium, right?
by Leila_4G
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: 627

Re: What is this?

This principle describes the movement of the reaction a certain way to make it try to reach equilibrium.
by Leila_4G
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: 111

Re: Changing K

Since changing temperature is the only thing that affects changing K, it becomes a different reaction, right?
by Leila_4G
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: 70

Re: Inert Gas

Similarly, why would adding a halogen be special in shifting/not shifting a reaction a certain way?
by Leila_4G
Thu Jan 23, 2020 7:56 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: suggestions
Replies: 16
Views: 152

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?
by Leila_4G
Thu Jan 23, 2020 7:55 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: pKa and pKb
Replies: 17
Views: 201

Re: pKa and pKb

@stephaniekim2k , That is a really great way of explaining it, thank you! It helped me a lot!
by Leila_4G
Thu Jan 23, 2020 7:53 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Endothermic Reaction.
Replies: 7
Views: 63

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?
by Leila_4G
Thu Jan 23, 2020 7:52 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: definition of a buffer
Replies: 8
Views: 126

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!
by Leila_4G
Thu Jan 23, 2020 7:41 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: pKa to Kb
Replies: 12
Views: 134

Re: pKa to Kb

Also, I'm forgetting the concentration equation for pKb, can someone help me with that? Thanks!
by Leila_4G
Thu Jan 23, 2020 7:37 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K value
Replies: 7
Views: 54

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?
by Leila_4G
Thu Jan 23, 2020 7:31 pm
Forum: Ideal Gases
Topic: When does the Ideal Gas Law Fail?
Replies: 7
Views: 60

Re: When does the Ideal Gas Law Fail?

Also, how often do the circumstances exist when it fails?
by Leila_4G
Thu Jan 23, 2020 7:30 pm
Forum: Ideal Gases
Topic: When does the Ideal Gas Law Fail?
Replies: 7
Views: 60

Re: When does the Ideal Gas Law Fail?

When it fails, how much does it differ than it is supposed to?
by Leila_4G
Thu Jan 23, 2020 7:29 pm
Forum: Ideal Gases
Topic: Ideal Gas meaning
Replies: 7
Views: 111

Re: Ideal Gas meaning

That's a good question, I've been wondering the same thing! Thank you!
by Leila_4G
Thu Jan 23, 2020 7:28 pm
Forum: Ideal Gases
Topic: solids and K
Replies: 8
Views: 77

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.
by Leila_4G
Thu Jan 23, 2020 7:23 pm
Forum: Ideal Gases
Topic: Acid and Bases
Replies: 16
Views: 140

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.
by Leila_4G
Thu Jan 23, 2020 7:20 pm
Forum: Ideal Gases
Topic: Acid and Bases
Replies: 16
Views: 140

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?
by Leila_4G
Thu Jan 23, 2020 7:18 pm
Forum: Ideal Gases
Topic: Acid and Bases
Replies: 16
Views: 140

Re: Acid and Bases

Is the pKa value on the same scale as the pH scale?
by Leila_4G
Thu Jan 23, 2020 7:16 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 43
Views: 512

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?
by Leila_4G
Tue Dec 03, 2019 9:12 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa and electronegativity
Replies: 2
Views: 46

Re: pKa and electronegativity

Thank you! This is very helpful!
by Leila_4G
Tue Dec 03, 2019 9:06 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Value of Kw?
Replies: 4
Views: 60

Re: Value of Kw?

I don't remember learning this, will it be on the final?
by Leila_4G
Tue Dec 03, 2019 9:04 pm
Forum: Calculating the pH of Salt Solutions
Topic: pKa vs Ka
Replies: 6
Views: 73

Re: pKa vs Ka

Ka will always be given, right? We don't have to memorize any of them, right?
by Leila_4G
Tue Dec 03, 2019 9:03 pm
Forum: Calculating the pH of Salt Solutions
Topic: pKa vs Ka
Replies: 6
Views: 73

Re: pKa vs Ka

Ka will always be given, right? We don't have to memorize any of them, right?
by Leila_4G
Tue Dec 03, 2019 8:56 pm
Forum: Polyprotic Acids & Bases
Topic: How can you tell
Replies: 11
Views: 273

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?
by Leila_4G
Tue Dec 03, 2019 8:54 pm
Forum: Hybridization
Topic: Triple Bond Hybridization
Replies: 4
Views: 43

Re: Triple Bond Hybridization

I'm kind of confused now...bond number (like triple/double/single) matters when dealing with hybridization?
by Leila_4G
Tue Dec 03, 2019 8:49 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 6
Views: 78

Re: Coordination Number

So, just to be clear, the coordination number is always the same as the areas of high electron population, right?
by Leila_4G
Tue Dec 03, 2019 8:48 pm
Forum: Naming
Topic: Naming Compounds with Two Ligands
Replies: 3
Views: 44

Re: Naming Compounds with Two Ligands

Thank you! This is very helpful!
by Leila_4G
Tue Dec 03, 2019 8:29 pm
Forum: Naming
Topic: Iron vs Ferrate
Replies: 5
Views: 42

Re: Iron vs Ferrate

Thank you all! This is very helpful
by Leila_4G
Tue Dec 03, 2019 8:25 pm
Forum: Biological Examples
Topic: Hydrogen Bonding sites
Replies: 8
Views: 84

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...?
by Leila_4G
Tue Dec 03, 2019 8:21 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 3
Views: 48

Re: Ligands

What is considered the list of common polyatomic ions?
by Leila_4G
Tue Dec 03, 2019 8:17 pm
Forum: Naming
Topic: Memorizing
Replies: 9
Views: 108

Re: Memorizing

I notice that there are not really many review sessions for naming, is it less important you think for the final?
by Leila_4G
Tue Dec 03, 2019 8:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Final tips
Replies: 19
Views: 308

Re: Final tips

Thank you guys for all of these tips! I wonder if also reading the book will help!
by Leila_4G
Tue Dec 03, 2019 8:10 pm
Forum: Student Social/Study Group
Topic: Preparing for the final
Replies: 25
Views: 341

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..
by Leila_4G
Tue Dec 03, 2019 8:08 pm
Forum: Student Social/Study Group
Topic: Preparing for the final
Replies: 25
Views: 341

Re: Preparing for the final

I'm still confused on how we find out about step up sessions. Is it on chem community?
by Leila_4G
Mon Nov 18, 2019 11:46 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi Bonds
Replies: 15
Views: 281

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!
by Leila_4G
Mon Nov 18, 2019 11:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: AXE formula
Replies: 9
Views: 82

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.
by Leila_4G
Mon Nov 18, 2019 11:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How to know which angles are smaller
Replies: 8
Views: 80

Re: How to know which angles are smaller

Also, what are the angles of AX5E (which I think is a square pyramidal shape)?
by Leila_4G
Mon Nov 18, 2019 11:42 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How to know which angles are smaller
Replies: 8
Views: 80

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
by Leila_4G
Mon Nov 18, 2019 11:41 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: seesaw
Replies: 5
Views: 73

Re: seesaw

Hi! I think it is less than 90 degrees and 120 degrees.
by Leila_4G
Mon Nov 18, 2019 11:40 pm
Forum: Hybridization
Topic: Hybridization
Replies: 4
Views: 49

Re: Hybridization

Do all molecules use hybridized orbitals?
by Leila_4G
Wed Nov 13, 2019 9:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Self Check 2E.3A
Replies: 2
Views: 53

Re: Self Check 2E.3A

The physical length that we show the triple bond does not matter when drawing, correct?

Thanks!
by Leila_4G
Wed Nov 13, 2019 9:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone pairs of other atoms in molecule
Replies: 3
Views: 47

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!
by Leila_4G
Wed Nov 13, 2019 9:05 pm
Forum: Hybridization
Topic: Pi vs Sigma Bonds
Replies: 4
Views: 55

Re: Pi vs Sigma Bonds

Therefore, less orbital overlap means a weaker bond?
Thanks!
by Leila_4G
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: 80

Re: Determining Polarity

So, just to be sure, if it is a nonmetal + alkaline earth metal, it is polar molecule?
by Leila_4G
Wed Nov 13, 2019 8:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 15
Views: 230

Re: Test 2

Up to what section in the textbook do we need to know for the test?
by Leila_4G
Tue Nov 05, 2019 12:03 am
Forum: Naming
Topic: Naming Compounds (general question)
Replies: 9
Views: 143

Re: Naming Compounds (general question)

From the homework questions, it seems like we do. I'm worried that we do?
by Leila_4G
Tue Nov 05, 2019 12:01 am
Forum: Octet Exceptions
Topic: Octet Rule exceptions
Replies: 14
Views: 320

Re: Octet Rule exceptions

Does anyone happen to know a fun/easy limerick to help memorize these?
Thanks!
by Leila_4G
Tue Nov 05, 2019 12:01 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polar Covalent VS Ionic
Replies: 11
Views: 152

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?
by Leila_4G
Mon Nov 04, 2019 11:59 pm
Forum: Dipole Moments
Topic: Dipole moment calculation
Replies: 2
Views: 50

Re: Dipole moment calculation

Is there a formula we have to remember from the Dipole Moments section? I'm having trouble remembering.
by Leila_4G
Mon Nov 04, 2019 11:58 pm
Forum: Electronegativity
Topic: Ionic or covalent?
Replies: 17
Views: 214

Re: Ionic or covalent?

Will we have to know the actual values of electronegativity to determine the minute differences? I assume probably not..
by Leila_4G
Mon Oct 28, 2019 8:38 pm
Forum: Octet Exceptions
Topic: expanded octet?
Replies: 9
Views: 115

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?
by Leila_4G
Mon Oct 28, 2019 8:37 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 14
Views: 140

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!
by Leila_4G
Mon Oct 28, 2019 8:36 pm
Forum: Electronegativity
Topic: Fluorine's Electronegativity
Replies: 6
Views: 118

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?
by Leila_4G
Mon Oct 28, 2019 8:32 pm
Forum: Octet Exceptions
Topic: aufbau principle
Replies: 8
Views: 143

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?
by Leila_4G
Mon Oct 28, 2019 8:30 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Purpose of the Equation
Replies: 9
Views: 116

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!)
by Leila_4G
Mon Oct 28, 2019 8:28 pm
Forum: Administrative Questions and Class Announcements
Topic: 10/28 Updates due to Fire [ENDORSED]
Replies: 14
Views: 1065

Re: 10/28 Updates due to Fire [ENDORSED]

Hi! I was also wondering when other midterm review sessions will be?
by Leila_4G
Thu Oct 17, 2019 11:02 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electron configurations
Replies: 2
Views: 55

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?
by Leila_4G
Thu Oct 17, 2019 10:55 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Magnetic Quantum number [ENDORSED]
Replies: 4
Views: 98

Re: Magnetic Quantum number [ENDORSED]

In the 3p subshell, where l=1, does this mean ml=0? Can ml=0?
by Leila_4G
Thu Oct 17, 2019 10:50 am
Forum: Quantum Numbers and The H-Atom
Topic: 1D 13 Homework [ENDORSED]
Replies: 1
Views: 74

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?
by Leila_4G
Thu Oct 17, 2019 10:47 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Indeterminacy in Position [ENDORSED]
Replies: 5
Views: 108

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?
by Leila_4G
Thu Oct 17, 2019 10:39 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Momentum
Replies: 7
Views: 134

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.

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