Search found 60 matches
- Fri Mar 15, 2019 12:04 am
- Forum: General Rate Laws
- Topic: Final Equations
- Replies: 4
- Views: 444
Re: Final Equations
I also don't see ln(k2/k1) = Ea/R (1/T1 - 1/T2) on any of the equations sheets he's given us but I feel like it would be provided. I'm not sure though. Hope this helps!
- Fri Mar 15, 2019 12:00 am
- Forum: General Rate Laws
- Topic: Final Equations
- Replies: 4
- Views: 444
Re: Final Equations
The only one I can think of is K = k/k'
equilibrium constant = rate constant of forward reaction / rate constant of reverse reaction
equilibrium constant = rate constant of forward reaction / rate constant of reverse reaction
- Thu Mar 14, 2019 11:55 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: activated complexes [ENDORSED]
- Replies: 2
- Views: 319
Re: activated complexes [ENDORSED]
Ok thanks!
- Thu Mar 14, 2019 11:55 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Metal dissolution
- Replies: 10
- Views: 986
Re: Metal dissolution
Do you know why that is the case?
- Thu Mar 14, 2019 11:53 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Effect of temp. on rate constants
- Replies: 3
- Views: 352
Re: Effect of temp. on rate constants
This is really helpful, thanks!
- Thu Mar 14, 2019 5:45 pm
- Forum: General Rate Laws
- Topic: rate laws
- Replies: 6
- Views: 606
Re: rate laws
Ok cool thanks!
- Thu Mar 14, 2019 3:31 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: intermediates vs. catalysts
- Replies: 2
- Views: 285
Re: intermediates vs. catalysts
Great, thanks!
- Thu Mar 14, 2019 2:12 pm
- Forum: *Enzyme Kinetics
- Topic: Catalysts
- Replies: 8
- Views: 1062
Re: Catalysts
Thank you!
- Thu Mar 14, 2019 2:12 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: intermediates vs. catalysts
- Replies: 2
- Views: 285
intermediates vs. catalysts
Just to clarify, if a compound is produced in one step and consumed in another step later on, it is an intermediate, and if a compound is consumed in one step and produced again in another step later on, it is a catalyst?
- Thu Mar 14, 2019 2:10 pm
- Forum: General Rate Laws
- Topic: rate laws
- Replies: 6
- Views: 606
rate laws
Do rate laws depend on the stoichiometric coefficients of the reactants in the balanced chemical equation?
- Thu Mar 14, 2019 2:08 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Effect of temp. on rate constants
- Replies: 3
- Views: 352
Effect of temp. on rate constants
Why does raising the temperature of a reaction increase the rate constant of the reaction with the higher activation barrier more than it will the rate constant of of the reaction with the lower energy barrier?
- Thu Mar 14, 2019 2:05 pm
- Forum: *Enzyme Kinetics
- Topic: Catalysts
- Replies: 8
- Views: 1062
Catalysts
Does a catalyst increase the rate of the reverse reaction too or just the forward reaction?
- Thu Mar 14, 2019 12:56 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: cell diagrams
- Replies: 6
- Views: 661
Re: cell diagrams
Ok thank you all!
- Thu Mar 14, 2019 12:44 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: cell diagrams
- Replies: 6
- Views: 661
Re: cell diagrams
So all liquids aren't included in the cell diagram or just H2O?
- Wed Mar 13, 2019 11:28 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: cell diagrams
- Replies: 6
- Views: 661
cell diagrams
What is the order for the cell diagrams including liquids?
- Wed Mar 13, 2019 11:27 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: activated complexes [ENDORSED]
- Replies: 2
- Views: 319
activated complexes [ENDORSED]
do we need to know how to draw proposed structures for activated complexes (like in 6E 15.85)?
- Wed Mar 13, 2019 11:24 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Metal dissolution
- Replies: 10
- Views: 986
Metal dissolution
Based on electrochemical properties, how can we tell if a metal will dissolve in solution?
- Fri Mar 08, 2019 6:56 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: electrolysis
- Replies: 4
- Views: 499
Re: electrolysis
ugh ur mind
- Fri Mar 08, 2019 6:52 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: electrolysis
- Replies: 4
- Views: 499
Re: electrolysis
How is an electrolytic cell different from a galvanic cell?
- Fri Mar 08, 2019 6:44 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: ion-selective electrode
- Replies: 3
- Views: 411
Re: ion-selective electrode
oops I meant thanks XD
- Fri Mar 08, 2019 6:43 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: ion-selective electrode
- Replies: 3
- Views: 411
Re: ion-selective electrode
Ok thakns!
- Fri Mar 08, 2019 6:42 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: electrolysis
- Replies: 4
- Views: 499
electrolysis
I'm having trouble understanding what electrolysis is. Can someone please explain the significance of this process?
- Fri Mar 08, 2019 6:38 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: ion-selective electrode
- Replies: 3
- Views: 411
ion-selective electrode
What is an ion-selective electrode and why is it significant?
- Wed Feb 13, 2019 4:33 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible expansion
- Replies: 4
- Views: 601
Re: Reversible expansion
Ok thank you!
- Wed Feb 13, 2019 4:32 pm
- Forum: Calculating Work of Expansion
- Topic: Expansion work
- Replies: 2
- Views: 268
Re: Expansion work
Thank you!
- Wed Feb 13, 2019 4:30 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Delta n
- Replies: 7
- Views: 1234
Re: Delta n
Ok thanks!
- Wed Feb 13, 2019 4:27 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Delta n
- Replies: 7
- Views: 1234
Delta n
I know that P x delta V = delta n x R x T but how do you calculate delta n?
- Wed Feb 13, 2019 4:24 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible expansion
- Replies: 4
- Views: 601
Reversible expansion
What is reversible expansion and how does it differ from irreversible expansion?
- Wed Feb 13, 2019 4:22 pm
- Forum: Calculating Work of Expansion
- Topic: Expansion work
- Replies: 2
- Views: 268
Expansion work
What is the definition of expansion work?
- Thu Feb 07, 2019 12:39 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW problem 4B. 13
- Replies: 5
- Views: 874
Re: HW problem 4B. 13
I am plugging the values into the w = -nRTln(V2/V1) equation but am not getting the right answer. Are my values correct?
n = (1.79atm)(6.52L)/(8.3145)(305K) = 0.00460 mol
w = -(.00460)(8.3145)(305)ln(6.52/4.29) = -488J
The answer in the book is -326J
n = (1.79atm)(6.52L)/(8.3145)(305K) = 0.00460 mol
w = -(.00460)(8.3145)(305)ln(6.52/4.29) = -488J
The answer in the book is -326J
- Sat Dec 08, 2018 12:26 am
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: 7th edition 6C.19
- Replies: 2
- Views: 293
Re: 7th edition 6C.19
Thank you!
- Thu Dec 06, 2018 11:00 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 7th edition 6B.9
- Replies: 2
- Views: 245
Re: 7th edition 6B.9
Ok thank you!
- Thu Dec 06, 2018 9:07 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: 7th edition 6C.19
- Replies: 2
- Views: 293
7th edition 6C.19
For part (c) of 6C.19 why is HClO2 a stronger acid than HBrO2 if bromine has a larger atomic radius and is thus less electronegative?
- Thu Dec 06, 2018 8:53 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Strength of an acid/base
- Replies: 2
- Views: 337
Re: Strength of an acid/base
But to calculate pKa and pKb we need acidity and basicity constants. Will we be given those on the test?
- Thu Dec 06, 2018 5:20 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 7th edition 6B.9
- Replies: 2
- Views: 245
7th edition 6B.9
part (i) of problem 6B.7 from the 7th edition asks to find [OH-], pH, and pOH from [H30+]=1.50M. When you calculate the pH from [H3O+] you get -log[1.50] which is -0.176 The answer in the back of the book is 0.176 (no negative) so do you just have to change it to positive when you calculate a pH to ...
- Wed Nov 28, 2018 12:22 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: 2D.3
- Replies: 2
- Views: 247
Re: 2D.3
Thank you!
- Sun Nov 25, 2018 11:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test 3
- Replies: 38
- Views: 2498
Re: Test 3
Will test 3 cover material covered in lecture on Monday (11/26)?
- Sun Nov 25, 2018 11:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sigma and Pi Bonds
- Replies: 3
- Views: 314
Re: Sigma and Pi Bonds
Sigma bonds allow atoms to rotate freely, unlike pi bonds.
- Sun Nov 25, 2018 11:52 pm
- Forum: Bond Lengths & Energies
- Topic: Dissociation Energy
- Replies: 4
- Views: 702
Re: Dissociation Energy
Does this apply to electronegativity values as well? Do we need to know exact values for the test or just trends?
- Sun Nov 25, 2018 11:47 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Ionic Character
- Replies: 3
- Views: 352
Ionic Character
A few of the homework questions gave you two compounds and asked you to determine which compound had bonds with greater ionic character. I just kind of estimated the electronegativity differences of the compounds using the periodic table, but I'm wondering if there's a better way to go about answeri...
- Sun Nov 25, 2018 11:42 pm
- Forum: Dipole Moments
- Topic: dipole
- Replies: 6
- Views: 538
Re: dipole
Do we need to know how to draw dipoles for the test?
- Sun Nov 25, 2018 11:40 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: 2D.3
- Replies: 2
- Views: 247
2D.3
For question 2D.3 from the 7th edition, do you need to know the electronegativity values of the elements and calculate the differences in electronegativity in order to determine which compounds are primarily ionic?
- Fri Nov 09, 2018 9:25 pm
- Forum: Dipole Moments
- Topic: Interaction Potential Energy
- Replies: 4
- Views: 384
Re: Interaction Potential Energy
Why is interaction potential energy always negative?
- Fri Nov 09, 2018 9:24 pm
- Forum: Electronegativity
- Topic: Electronegativity
- Replies: 8
- Views: 700
Re: Electronegativity
How do you predict an atom's electronegativity? Is it a periodic trend?
- Fri Nov 09, 2018 9:19 pm
- Forum: Dipole Moments
- Topic: Dipole
- Replies: 8
- Views: 746
Re: Dipole
What exactly does the term "dipole" mean?
- Fri Nov 02, 2018 11:57 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Valence shells
- Replies: 1
- Views: 209
Valence shells
When there are electrons in the 4s or 4p orbitals, is the 3d sub shell not considered part of the valence shell?
- Fri Nov 02, 2018 11:53 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Node
- Replies: 2
- Views: 349
Node
I'm having trouble understanding what a node is in relation to a wavefunction. Can someone explain this concept to me?
- Fri Nov 02, 2018 11:51 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Problem 1B.27
- Replies: 1
- Views: 154
Problem 1B.27
In this problem from the seventh edition from the textbook, is the uncertainty in velocity 5 or 10, and why?
- Fri Nov 02, 2018 11:47 pm
- Forum: *Shrodinger Equation
- Topic: Midterm
- Replies: 6
- Views: 996
Re: Midterm
The midterm only covers up to Wednesday's material, right?
- Fri Nov 02, 2018 11:46 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Nodal planes
- Replies: 6
- Views: 1285
Re: Nodal planes
Why is the number of nodal planes equal to the value of l?
- Fri Nov 02, 2018 11:41 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Shells, Subshells, Orbitals
- Replies: 4
- Views: 3135
Shells, Subshells, Orbitals
I'm having trouble conceptually understanding the difference between shells, subshells, and orbitals. Can someone help me?
- Fri Oct 19, 2018 11:27 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Test Two: Electron Configuration
- Replies: 6
- Views: 618
Re: Test Two: Electron Configuration
I believe Professor Lavelle said that everything up to, and including, today's lecture material will be on test two.
- Fri Oct 19, 2018 11:23 pm
- Forum: Photoelectric Effect
- Topic: Significance of the photoelectric effect
- Replies: 3
- Views: 11258
Re: Significance of the photoelectric effect
The photoelectric effect is significant because it demonstrates that light has particle-like qualities. It established that we can consider light as photons (packets) of energy where one photon interacts w/ one electron and each photon must have sufficient energy to remove each electron. This is why...
- Fri Oct 19, 2018 11:12 pm
- Forum: SI Units, Unit Conversions
- Topic: Remembering Unit Conversions
- Replies: 5
- Views: 867
Re: Remembering Unit Conversions
This is really helpful, thanks! :)
- Fri Oct 12, 2018 11:56 pm
- Forum: Properties of Electrons
- Topic: Free vs. Bound Electrons
- Replies: 6
- Views: 5923
Re: Free vs. Bound Electrons
A free electron is one that is not bound to an atom, whereas a bound electron is one that is bound to the nucleus of atom. An important distinction is that free electrons are not apart of the quantum system, whereas bound electrons are.
- Fri Oct 12, 2018 11:52 pm
- Forum: DeBroglie Equation
- Topic: explain debroglie equation?
- Replies: 3
- Views: 212
Re: explain debroglie equation?
The debroglie equation is used to describe the wavelike nature of an electron. The equation is: wavelength = /mv
The equation can also be applied to larger objects like cars to see if they have measurable wavelike properties.
The equation can also be applied to larger objects like cars to see if they have measurable wavelike properties.
- Fri Oct 12, 2018 11:44 pm
- Forum: Properties of Electrons
- Topic: Wave Particles Duality of Matter
- Replies: 4
- Views: 311
Re: Wave Particles Duality of Matter
So then what exactly are diffraction patterns and how do constructive and destructive interference affect them?
- Fri Oct 05, 2018 11:22 pm
- Forum: SI Units, Unit Conversions
- Topic: formula units [ENDORSED]
- Replies: 69
- Views: 32438
Re: formula units [ENDORSED]
So is the term 'formula units' only relevant when talking about compounds?
- Fri Oct 05, 2018 11:21 pm
- Forum: SI Units, Unit Conversions
- Topic: How does grading for discussion posts work?
- Replies: 80
- Views: 8190
Re: How does grading for discussion posts work?
Are our posts due by Friday or Sunday, typically?
- Fri Oct 05, 2018 11:13 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting reagents
- Replies: 12
- Views: 823
Re: Limiting reagents
There cannot be more than one limiting reactant. There is no limiting reactant if both substances are completely used up.