Search found 112 matches
- Tue Mar 10, 2020 1:15 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts
- Replies: 1
- Views: 215
Re: Catalysts
I think it can be added to any step, but only adding it to the slow step will really change the rate of the reaction. It will both affect the activation energy barrier, but only the one in the slow step will make a difference in the rate because that is the rate determining step.
- Tue Mar 10, 2020 1:13 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Calculation for pre-exponential factor A
- Replies: 3
- Views: 298
Re: Calculation for pre-exponential factor A
I think it would be given because he didn't really say we really needed to know it?
- Tue Mar 10, 2020 1:12 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: catalytic converter
- Replies: 2
- Views: 252
Re: catalytic converter
I think a catalytic converter is used to convert toxic cases like carbon monoxide to something less toxic and is used by coating an exhaust engine with a catalytic converter (I think like platinum?) Can someone confirm
- Tue Mar 10, 2020 1:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Coronavirus Concern
- Replies: 6
- Views: 632
Re: Coronavirus Concern
I think only 7 classrooms are equipped with Bruincast, so not sure if that is an option. I think that the most liekly option is to use zoom and have online classes instead.
- Tue Mar 10, 2020 1:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: practice test
- Replies: 2
- Views: 295
Re: practice test
I think Lyndon posted a review called "endgame"
- Tue Mar 03, 2020 12:49 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.7
- Replies: 5
- Views: 371
Re: 6M.7
I had the same question, but I think it would be given to us. Maybe use the one with the solid substance?
- Tue Mar 03, 2020 12:47 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 3
- Views: 306
Re: Cell Diagrams
I don’t think spectator ions are included
- Tue Mar 03, 2020 12:46 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: n
- Replies: 4
- Views: 353
Re: n
I think you find the amount of electrons transferred in the balanced reaction. So it is the number of electrons that eventually cancels out.
- Tue Mar 03, 2020 12:07 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: H2O or Metal Ion
- Replies: 2
- Views: 268
H2O or Metal Ion
How can I tell whether a metal ion or H2O is reduced for electrolysis?
- Mon Mar 02, 2020 12:19 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6n.3
- Replies: 1
- Views: 264
6n.3
Predict the potential of each of the following cells:
(a) Pt(s) | H2(g, 1.0 bar) | HCl(aq, 0.075 mol?L21) || HCl(aq, 1.0 mol?L21) | H2(g, 1.0 bar) | Pt(s).
How do you find the half reactions for this problem?
(a) Pt(s) | H2(g, 1.0 bar) | HCl(aq, 0.075 mol?L21) || HCl(aq, 1.0 mol?L21) | H2(g, 1.0 bar) | Pt(s).
How do you find the half reactions for this problem?
- Sat Feb 29, 2020 8:59 pm
- Forum: Balancing Redox Reactions
- Topic: Difference between balancing Basic and Acidic
- Replies: 3
- Views: 324
Re: Difference between balancing Basic and Acidic
Is the only difference between balancing basic and acidic reactions whether you add H+ or OH? Also, do you guys have any tips for balancing? Hi Rita, From what I understand, that is the most important difference between the two! I spoke with Matthew Tran, a UA, regarding balancing tips. I thought h...
- Sat Feb 29, 2020 3:40 pm
- Forum: Balancing Redox Reactions
- Topic: Homework 6K.3
- Replies: 2
- Views: 237
Re: Homework 6K.3
Does this mean that during the same reaction, it can be reduced and oxidized (some will get reduced and some will get oxidized?)
- Sat Feb 29, 2020 3:39 pm
- Forum: Balancing Redox Reactions
- Topic: Difference between balancing Basic and Acidic
- Replies: 3
- Views: 324
Difference between balancing Basic and Acidic
Is the only difference between balancing basic and acidic reactions whether you add H+ or OH?
Also, do you guys have any tips for balancing?
Also, do you guys have any tips for balancing?
- Sat Feb 29, 2020 3:35 pm
- Forum: Balancing Redox Reactions
- Topic: Redox Reactions
- Replies: 2
- Views: 330
- Sat Feb 29, 2020 3:06 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Very first learning objective on 2nd page of thermodynamics
- Replies: 2
- Views: 261
Re: Very first learning objective on 2nd page of thermodynamics
Maybe it's talking about delta G, which uses RT lnQ, which may depend on pressures?
- Sat Feb 29, 2020 3:02 pm
- Forum: General Rate Laws
- Topic: Unique Rate Applications
- Replies: 2
- Views: 256
Re: Unique Rate Applications
I think we can use it to determine the concentration of reactants at a certain point in reaction.
- Sat Feb 22, 2020 1:43 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: more than 2 cells
- Replies: 3
- Views: 289
more than 2 cells
Is it possible to have more than 2 galvanic cells together? How would that work?
- Sat Feb 22, 2020 1:39 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Cell Potential
- Replies: 2
- Views: 210
Re: Cell Potential
I was wondering the same thing. I know that if the reaction is spontaneous and delta G is negative, the E must be positive because of Nernst equation. But I am not sure for if E cell < Estandard Cell.
- Sat Feb 22, 2020 1:36 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Concentration effect on E
- Replies: 4
- Views: 364
Re: Concentration effect on E
I think it depends on the reaction? I could be wrong, but in Dr. Lavelle's example today, the increasing in Mn concentration, caused the forward reaction to be favored, making E increase since the E standard was positive. I think it depends what you increase in concentration.
- Sat Feb 22, 2020 1:34 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Potential difference
- Replies: 3
- Views: 243
Re: Potential difference
I think it just means that the potential difference is the amount of work energy needed to be able to take one electric charge from one place to another.
- Sat Feb 22, 2020 1:31 am
- Forum: Balancing Redox Reactions
- Topic: Homework 6K.3
- Replies: 2
- Views: 237
Homework 6K.3
We are supposed to find the oxidizing agent/reducing agent of: Cl2(g) --> HClO (aq) +Cl2 (g)
My question is, conceptually, how can something be both the oxidizing and reducing agent?
My question is, conceptually, how can something be both the oxidizing and reducing agent?
- Wed Feb 12, 2020 11:48 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Difference between equations
- Replies: 2
- Views: 268
Difference between equations
When would I use nRln(V2/V1) and when would i use nCpln(T2/T1)? If the pressure is constant and the volume changes, the temperature changes too, so shouldn't both equations be able to be used?
- Wed Feb 12, 2020 9:15 am
- Forum: Calculating Work of Expansion
- Topic: Lyndon Review Questions #6
- Replies: 2
- Views: 273
Re: Lyndon Review Questions #6
In the question, how would you approach it? What would you try to solve for first?
- Wed Feb 12, 2020 9:11 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: P1/P2
- Replies: 10
- Views: 1159
P1/P2
Why is it P1/P2 for delta S and V2/V1?
- Wed Feb 12, 2020 9:10 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Reversible vs Irreversible
- Replies: 5
- Views: 400
Reversible vs Irreversible
Is the only time we need to differentiate between reversible and irreversible when calculating work with: eversible: - nRT ln (v1/v2) and -Pext ΔV and when calculating delta S?
- Wed Feb 12, 2020 9:07 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Negative work
- Replies: 14
- Views: 889
Negative work
When is work negative?
- Wed Feb 12, 2020 9:06 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: using the first law
- Replies: 3
- Views: 266
using the first law
When will I need to factor in both q and w? I’m a little confused.
- Sun Feb 09, 2020 1:13 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Entropy Surroundings
- Replies: 4
- Views: 205
Re: Entropy Surroundings
Does increasing the temperature always change the entropy of the surroundings?
- Sun Feb 09, 2020 1:11 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: Entropy Changes for Phase Changes
- Replies: 1
- Views: 102
Entropy Changes for Phase Changes
In Dr. Lavelle's lecture, he stated that phase changes have entropy changes. Can someone explain why?
- Sun Feb 09, 2020 1:08 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Gas Expansion
- Replies: 3
- Views: 151
Gas Expansion
In Dr. Lavelle's lecture, can someone explain why if delta U is 0, why the gas expands?
- Sun Feb 09, 2020 1:02 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Spontaneous vs Favorable
- Replies: 8
- Views: 406
Spontaneous vs Favorable
Can someone explain spontaneous vs favorable more? I feel like it's often used very interchangeably.
- Sun Feb 09, 2020 12:55 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Finding whether exothermic or Endothermic
- Replies: 4
- Views: 153
Finding whether exothermic or Endothermic
Are we going to be able to know if a reaction is exothermic or endothermic if the delta H isn't given? If so, how?
- Thu Jan 30, 2020 11:44 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Standard Form of molecule
- Replies: 6
- Views: 416
Re: Standard Form of molecule
How about at bar because they are very similar?
- Thu Jan 30, 2020 11:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 8
- Views: 312
Midterm
What will the midterm cover?
- Thu Jan 30, 2020 11:42 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpies of Formation
- Replies: 4
- Views: 165
Enthalpies of Formation
Will the enthalpies of formation always be given to us if we need it on the test?
- Thu Jan 30, 2020 11:41 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated vs Closed [ENDORSED]
- Replies: 34
- Views: 4088
Isolated vs Closed [ENDORSED]
How can we tell which one is which? Like does an insulated water bottle count as isolated?
- Thu Jan 30, 2020 11:39 pm
- Forum: Calculating Work of Expansion
- Topic: ∆H and ∆U
- Replies: 3
- Views: 170
∆H and ∆U
Can someone simply explain ∆H and ∆U for me?
- Mon Jan 20, 2020 11:28 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6D.15
- Replies: 2
- Views: 121
6D.15
How do we calculate the pH of 0.055 M AlCl3 (aq)?
- Mon Jan 20, 2020 9:36 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Homework 6c.1
- Replies: 1
- Views: 99
Homework 6c.1
Write (a) the chemical equation for the proton transfer equilibrium in water and the corresponding expression for Ka and (b) the chemical equation for the proton transfer equilibrium of the conjugate base and the corresponding expression for Kb for each of the following weak acids: i) HClO2 ii) HCN ...
- Mon Jan 20, 2020 3:52 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Kc vs K
- Replies: 7
- Views: 313
Re: Kc vs K
But what if the Kc and K are different? Will we usually be given K or Kc depending on which one we use?
- Mon Jan 20, 2020 3:50 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Converting K to Kc
- Replies: 4
- Views: 257
Converting K to Kc
Do we need to know how to convert it? If so, how?
- Mon Jan 20, 2020 3:49 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Kc vs K
- Replies: 7
- Views: 313
Re: Kc vs K
So when do we use K and when do we use Kc? When will we need to convert and how do we convert it?
- Mon Jan 20, 2020 3:41 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Kc vs K
- Replies: 7
- Views: 313
Kc vs K
Whats the difference between Kc and K?
- Thu Jan 16, 2020 12:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quadratic
- Replies: 6
- Views: 158
Re: Quadratic
Definitely try to memorize it. I think doing more practice problems really helps you with that!
- Thu Jan 16, 2020 12:40 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6C.13
- Replies: 2
- Views: 108
Re: 6C.13
I think that the stronger the acid or base, the weaker the conjugate base or acid. So I think you are supposed to use the pKa to determine how strong it is and then compare its conjugate base or acid to the rest.
- Thu Jan 16, 2020 12:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Questions 6C5,6c9
- Replies: 1
- Views: 116
Re: Questions 6C5,6c9
6C.5 Write the chemical formula for the conjugate base of formic acid, HCOOH and calculate its pKb from the pKa of formic acid (see Table 6C.1).
6C.9 Use data from Tables 6C.1 and 6C.2 to place the following
bases in order of increasing strength: F2, NH , CH CO 2, C H N
(pyridine).
6C.9 Use data from Tables 6C.1 and 6C.2 to place the following
bases in order of increasing strength: F2, NH , CH CO 2, C H N
(pyridine).
- Tue Jan 14, 2020 1:29 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Change on Same Side
- Replies: 6
- Views: 196
Change on Same Side
In something like N2 + 3H2 —> 2NH3, if we increased N2, does it affect H2 as well?
- Tue Jan 14, 2020 1:27 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Why Ignore Liquid or Solid Volume When Calculating K
- Replies: 7
- Views: 229
Re: Why Ignore Liquid or Solid Volume When Calculating K
I think one thing is that the activity of a solid or liquid is equal to 1, so it doesn’t affect the K constant. Also in terms of solids, it is not dissolved, so would not have a concentration and I think something similar can be said with liquids as well.
- Tue Jan 07, 2020 12:06 pm
- Forum: Ideal Gases
- Topic: Dynamic Equilibrium
- Replies: 10
- Views: 356
Re: Dynamic Equilibrium
How do we know when something is in dynamic equilibrium?
- Tue Jan 07, 2020 12:04 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Very Large K
- Replies: 12
- Views: 2525
Re: Very Large K
At what point should we put the single arrow and not the double arrow?
- Tue Jan 07, 2020 12:03 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Keq vs Kc
- Replies: 6
- Views: 408
Keq vs Kc
Is Keq the same as Kc?
When do we use which?
When do we use which?
- Tue Jan 07, 2020 12:02 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Pressure's Effect on Equilibrium
- Replies: 6
- Views: 237
Re: Pressure's Effect on Equilibrium
I think simply it’s because the inside doesn’t change so the products and reactants don’t change so the K is still the same.
- Tue Jan 07, 2020 11:59 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Effects of Concentration on Equilibrium
- Replies: 6
- Views: 252
Re: Effects of Concentration on Equilibrium
I believe so. I think it’s also important to note that reactions are continually reacting, so if something is changed, it will want to go back to its original equilibrium state.
- Sat Dec 07, 2019 8:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
- Replies: 115
- Views: 12220
Re: MARSHMALLOW- FINAL REVIEW SESSION [ENDORSED]
Wait how do you know whether a coordination compound is a chelate? For example, how do you know that [Ni(NH3)2O2]Br2 is not a chelate?
- Sat Dec 07, 2019 3:34 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 1
- Views: 91
Polydentate
How would ew determine that HN(CH2Ch2NH2)2 is polydentate? Do we need to draw it out? If so, how do you know how ot draw it?
- Fri Dec 06, 2019 4:26 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand Names sheet
- Replies: 1
- Views: 124
Ligand Names sheet
Will we be given the ligand names in coordination compounds sheet that was sent out?
- Fri Dec 06, 2019 2:34 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: free radicals
- Replies: 1
- Views: 241
free radicals
Do free radicals count as electron density?
- Thu Dec 05, 2019 1:05 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Acid/Base Trends
- Replies: 6
- Views: 378
Re: Acid/Base Trends
I think this is because as you go down a group for binary acids, you are looking at the strength and length of the HA bond, not the polarity, so the weaker the HA bond, the stronger the acid.
- Wed Dec 04, 2019 7:10 pm
- Forum: Hybridization
- Topic: hybrid orbitals
- Replies: 2
- Views: 191
Re: hybrid orbitals
I feel like we wouldn’t need to know that since its pretty complicated (ish)
- Wed Dec 04, 2019 7:08 pm
- Forum: Bond Lengths & Energies
- Topic: conjugation
- Replies: 3
- Views: 318
Re: conjugation
Could someone explain conjugation in general and when we need it?
- Wed Dec 04, 2019 7:07 pm
- Forum: Naming
- Topic: Naming with Latin names
- Replies: 1
- Views: 177
Naming with Latin names
Which latin names do we need to know? for example, will we be given that Copper would be cuprate?
- Wed Dec 04, 2019 7:06 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Need to Know About Chelating
- Replies: 1
- Views: 79
Re: Need to Know About Chelating
I would think that you would just need to know what counts, so like knowing that bidentate would be chelating, or when it counts as chelating (2 or more bonds to a metal ion)
- Wed Dec 04, 2019 7:04 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: - Dentate
- Replies: 1
- Views: 67
Re: - Dentate
I think this refers to how many bonds the ligands can make to an ion. So like for example, if you had C2H4, it would be bidentate, because it could bind to something like Zn2+.
- Mon Dec 02, 2019 9:08 pm
- Forum: Lewis Acids & Bases
- Topic: Problem J.9
- Replies: 4
- Views: 162
Problem J.9
Identify the salt that is produced from the acid-base neutralization reaction between potassium hydroxide and acetic acid.
How would I do this? I know it is supposed to produce water but the salt doesn't look quite right if I have more than 1 carbon
How would I do this? I know it is supposed to produce water but the salt doesn't look quite right if I have more than 1 carbon
- Tue Nov 26, 2019 8:22 am
- Forum: Hybridization
- Topic: How to write
- Replies: 3
- Views: 123
How to write
How do I know how to write these hybridization? How does it relate to shape?
- Tue Nov 26, 2019 8:22 am
- Forum: Dipole Moments
- Topic: Intermolecular force
- Replies: 5
- Views: 588
Intermolecular force
Would it be okay to say that even though it is an intermolecular force, the stronger, the harder the bonds are to break?
- Tue Nov 26, 2019 8:19 am
- Forum: Sigma & Pi Bonds
- Topic: Strength of the Bonds
- Replies: 2
- Views: 123
Strength of the Bonds
Will pi bonds be stronger than sigma bonds? Or is there a way to tell whether there is a strength difference?
- Tue Nov 26, 2019 8:18 am
- Forum: Sigma & Pi Bonds
- Topic: Promotion
- Replies: 5
- Views: 599
Re: Promotion
So does promotion just refer to having an electron be at a higher electron state/bringing it to a higher orbital?
- Tue Nov 26, 2019 8:16 am
- Forum: Naming
- Topic: H2O vs OH2
- Replies: 3
- Views: 168
Re: H2O vs OH2
I think you write OH2 to emphasize that it is not bound to the hydrogen, but to the metal of the ligand. I think either is fine, but if you wanted to emphasize the coordination compound it would be OH2.
- Mon Nov 18, 2019 9:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: CS2
- Replies: 1
- Views: 746
CS2
Is CS2 non-polar because of symmetry?
- Mon Nov 18, 2019 9:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: (CH3)2Be
- Replies: 1
- Views: 85
(CH3)2Be
How do I know which one is the central atom? If Be was the central atom, it would be linear right? But the solutions said tetrahedral about the carbon atom so I’m not sure which one I would put.
- Mon Nov 18, 2019 8:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs
- Replies: 3
- Views: 131
Lone Pairs
Why do lone pairs take up more space?
- Mon Nov 18, 2019 4:34 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shapes
- Replies: 1
- Views: 84
Molecular Shapes
Do we need to know all the shapes or just the ones that he went over in class? I am looking at some of them and we haven't really discussed some of these before. Is it just his lectures, lectures + book, or lectures + book + everything else?
- Mon Nov 18, 2019 4:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone pair placement
- Replies: 2
- Views: 130
Re: Lone pair placement
I think that you place it where it will have the largest distance so that it will stabilize the structure. Not sure if that is completely correct, I am confused a little too.
- Mon Nov 18, 2019 12:24 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: CH2Cl2
- Replies: 1
- Views: 160
CH2Cl2
Why is CH2Cl2 going to have dipole-dipole interactions? Does the symmetry not matter?
- Mon Nov 18, 2019 12:17 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: H2SeO4
- Replies: 1
- Views: 185
H2SeO4
Where is the dipole-dipole interaction in this? Is it with the O-H? Can someone explain to me what the dipole-dipole interaction really is because I only really know of the interaction between water molecules as being dipole-dipole, so how can one molecule have dipole-dipole interactions?
- Mon Nov 18, 2019 12:14 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: NH2OH
- Replies: 1
- Views: 166
NH2OH
Where is the dipole-dipole interaction in this?
- Tue Nov 12, 2019 12:35 pm
- Forum: Octet Exceptions
- Topic: Antioxidants
- Replies: 9
- Views: 660
Re: Antioxidants
What happens to the antioxidants afterward?
- Tue Nov 12, 2019 12:34 pm
- Forum: Empirical & Molecular Formulas
- Topic: Midterm question 1
- Replies: 6
- Views: 515
Re: Midterm question 1
Do you guys think if I wrote it in the wrong order, it would be ok? Or would it be partial credit.
- Tue Nov 12, 2019 12:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionization of Nitrogen vs Oxygen
- Replies: 11
- Views: 1534
Re: Ionization of Nitrogen vs Oxygen
I was wondering whether this goes for the ones below as well. I was a little confused whether these exceptions are for all of the ones that follow the same atom trend.
- Tue Nov 12, 2019 12:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: test 2
- Replies: 1
- Views: 100
test 2
Does anyone know what Test 2 will be on? Will it be a cumulative kind of test, or just on the new sections?
- Tue Nov 12, 2019 12:30 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Week 7 Homework
- Replies: 7
- Views: 261
Re: Week 7 Homework
I think that week 7 homework is on anything that we learned during discussion or if there is a test, whatever it is like a test. But honestly, I think that if you do the questions for the material covered in that week, it would be okay.
- Mon Nov 04, 2019 2:26 pm
- Forum: Lewis Structures
- Topic: When to use brackets
- Replies: 2
- Views: 160
When to use brackets
When do we need to use brackets? And also for ionic compounds, will we always write them separately with brackets, adding the electron on the anion?
- Mon Nov 04, 2019 2:25 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect Word Problems
- Replies: 1
- Views: 151
Re: Photoelectric Effect Word Problems
If it is asking about the threshold, it is usually the total kinetic energy of the incoming light minus the energy of the electron emitted, while kinetic energy it could be talking about the kinetic energy of the electron emitted, or the photon itself. If it is talking about the source, usually it w...
- Mon Nov 04, 2019 2:20 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 12
- Views: 457
Re: Midterm
For the midterm, do you know what will be provided in terms of sheets? Like will we be given electronegativity values? Or bond lengths?
- Mon Nov 04, 2019 2:18 pm
- Forum: General Science Questions
- Topic: Chem 14 B and Chem 14 BL
- Replies: 1
- Views: 110
Chem 14 B and Chem 14 BL
Can someone please explain the two classes for chem 14B and chem 14BL? When should we be taking it? I heard that you can take it at the same time. but do most people take it at the same time?
- Mon Nov 04, 2019 2:16 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polyatomic Ions
- Replies: 2
- Views: 193
Polyatomic Ions
Which polyatomic ions will we need to know? And do we need to know naming and to what extent?
- Mon Oct 28, 2019 1:30 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ground-State electron configuration
- Replies: 3
- Views: 155
Ground-State electron configuration
Can someone please explain to me what it means by ground-state? What is the difference between ground state and excited state?
- Mon Oct 28, 2019 1:28 pm
- Forum: Ionic & Covalent Bonds
- Topic: likely charge of atoms
- Replies: 3
- Views: 111
Re: likely charge of atoms
I think Ga would likely be 3+ because it has 3 valence electrons.
- Mon Oct 28, 2019 1:26 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Configuration: 2A.5B
- Replies: 1
- Views: 74
Electron Configuration: 2A.5B
Can someone please explain to me how to do part B of 2A.5? I don’t get how to incorporate the F-block.
The question is Give the ground-state electron configuration expected for Bi3+.
The question is Give the ground-state electron configuration expected for Bi3+.
- Mon Oct 28, 2019 1:24 pm
- Forum: Bond Lengths & Energies
- Topic: Electron-Electron Repulsion
- Replies: 2
- Views: 167
Electron-Electron Repulsion
I was wondering if someone could explain to me more about the electron-electron repulsion that makes the atomic radii bigger (I think). Does it matter that much and which one has a bigger impact, the pull from the protons or that repulsion?
- Mon Oct 28, 2019 1:10 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 1
- Views: 105
Midterm
Because class was cancelled, and there was materiel that we were supposed to go through today, does that mean there will be less material on the midterm or will he just speed up the class time learning?
- Thu Oct 24, 2019 12:18 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Noble Gas Configuration
- Replies: 10
- Views: 858
Noble Gas Configuration
Does anyone know when we need to use noble gas configuration (simplified) rather than the traditional long electron configuration?
- Thu Oct 24, 2019 12:16 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 2nd electron
- Replies: 4
- Views: 146
Re: 2nd electron
You can think of it like you are making an atom that is already more positive than it should be, even more positive. It will be harder because the atom wants to keep that electron and you are taking it away from its stable form and the form in which it has no net positive or negative charge.
- Thu Oct 24, 2019 12:15 pm
- Forum: Trends in The Periodic Table
- Topic: Trends
- Replies: 5
- Views: 152
Re: Trends
Knowing the ionization energy and electron affinity (electronegativity) is probably the most important. It may also help to know the trends in the size of these atoms because it can really help you determine the other two. The other two are important because they can help you determine what will be ...
- Thu Oct 24, 2019 12:13 pm
- Forum: Ionic & Covalent Bonds
- Topic: strength of bonds
- Replies: 14
- Views: 957
Re: strength of bonds
The strength of a bond is affected by the charge and distance for ionic bonds. The strength of a bond is affected by the electronegativity differences and the bond length. Generally, double bonds are stronger than single bonds and triple bonds are stronger than double bonds. We will probably need to...
- Thu Oct 24, 2019 12:10 pm
- Forum: *Particle in a Box
- Topic: TEST 2
- Replies: 14
- Views: 1283
Re: TEST 2
Test 2 will be during your discussion session from week 8 starting from November 19th!
- Sat Oct 19, 2019 9:37 pm
- Forum: General Science Questions
- Topic: Tests
- Replies: 9
- Views: 387
Re: Tests
I think if there is one they don’t expect you to know, they will put it on the sheet. The ones you should know are the ones we went over in class though. Any other conversions that are semi-difficult should be put on the sheet.
- Sat Oct 19, 2019 9:35 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration
- Replies: 1
- Views: 104
Electron Configuration
Can someone please clarify what Dr. Lavelle said about putting 3d in front of 4s? Thank you!
- Sat Oct 19, 2019 9:33 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Letter Names
- Replies: 4
- Views: 125
Re: Letter Names
The letters themselves represent a word. S represents sharp, p represents principal, f represents fundamental and d represents diffuse.Thi sis from the spectra of the alkali metals.