Search found 59 matches
- Sat Mar 16, 2019 9:44 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts
- Replies: 2
- Views: 521
Catalysts
What is the difference between a homogeneous and heterogenous catalyst that has on the reaction?
- Sat Mar 16, 2019 9:43 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts
- Replies: 28
- Views: 1851
Catalysts
How does a catlyst effect the reaction curve? I
- Sat Mar 16, 2019 9:41 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Equation
- Replies: 3
- Views: 662
Arrhenius Equation
What do we use the Arrhenius equation for?
- Sat Mar 16, 2019 9:25 pm
- Forum: Second Order Reactions
- Topic: units
- Replies: 5
- Views: 676
units
what is the units of k for a second order reaction
- Sat Mar 16, 2019 9:25 pm
- Forum: First Order Reactions
- Topic: units
- Replies: 3
- Views: 613
units
what is the units of k for a first order reaction
- Sat Mar 16, 2019 9:23 pm
- Forum: Zero Order Reactions
- Topic: overall rate
- Replies: 5
- Views: 873
overall rate
when writing the overall rate of the reaction we don't write in zero-order reactions right?
- Sat Mar 16, 2019 9:17 pm
- Forum: General Rate Laws
- Topic: rate of consumption
- Replies: 2
- Views: 649
rate of consumption
Why does the average rate of consumption formula have a negative and the average rate of formation does not?
- Sat Mar 16, 2019 8:54 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst Equation
- Replies: 3
- Views: 569
Nernst Equation
What is the purpose of the Nernst Equation?
- Sat Mar 16, 2019 8:02 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: standard cell potentials
- Replies: 5
- Views: 441
Re: standard cell potentials
So when the cell potential has a negative value then does that mean the reaction is not spontaneous?
- Sat Mar 16, 2019 8:01 pm
- Forum: Balancing Redox Reactions
- Topic: cell diagram
- Replies: 3
- Views: 554
Re: cell diagram
Thank you that was very helpful! Which instances would you apply Pt(s) on both sides of the diagram?
- Sat Mar 16, 2019 7:57 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Cell potential and Gibbs Free energy
- Replies: 2
- Views: 529
Cell potential and Gibbs Free energy
in the equation
deltaG= -nFE
what does n stand for? is it number of moles?
deltaG= -nFE
what does n stand for? is it number of moles?
- Sat Mar 16, 2019 3:34 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: standard cell potentials
- Replies: 5
- Views: 441
standard cell potentials
Why do standard cell potentials have to be positive?
- Sat Mar 16, 2019 3:33 pm
- Forum: Balancing Redox Reactions
- Topic: cell diagram
- Replies: 3
- Views: 554
cell diagram
I am sure this question has been asked a million times already I am just still very confused on writing the cell diagram for a redox reaction.
When do we add Pt(s) and what does that mean?
When do we add Pt(s) and what does that mean?
- Sat Mar 16, 2019 3:31 pm
- Forum: General Rate Laws
- Topic: unique rate [ENDORSED]
- Replies: 3
- Views: 680
Re: unique rate [ENDORSED]
these were very helpful thank you so much
- Mon Mar 11, 2019 9:39 pm
- Forum: General Rate Laws
- Topic: unique rate [ENDORSED]
- Replies: 3
- Views: 680
unique rate [ENDORSED]
what is the difference between a unique rate vs. an instantaneous rate?
- Wed Feb 27, 2019 1:02 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: test 2
- Replies: 6
- Views: 522
Re: test 2
for outline 4 I believe it will be any material we learned during week 6
- Wed Feb 20, 2019 4:23 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 5
- Views: 875
Midterm
I have a question about Question 3D
What is Ka2?
What is Ka2?
- Wed Feb 13, 2019 2:59 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equilibrium constant
- Replies: 3
- Views: 308
Equilibrium constant
Is the equilibrium constant, K unitless?
- Wed Feb 13, 2019 1:12 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: state function
- Replies: 4
- Views: 451
Re: state function
why is Internal energy a state function if it is comprised of heat and work which are both not state functions?
- Wed Feb 13, 2019 12:30 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: state function
- Replies: 4
- Views: 451
state function
Is work a state function?
- Tue Feb 12, 2019 11:23 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: work
- Replies: 5
- Views: 563
work
If we are calculating work on a system and W is a positive number, does that mean work is done by the system or work is done on the system? What is the difference between these two?
- Sun Feb 10, 2019 5:47 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: midterm
- Replies: 5
- Views: 571
Re: midterm
thank you so much
- Sun Feb 10, 2019 3:58 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: midterm
- Replies: 5
- Views: 571
midterm
does the midterm cover outlines 1-4?
- Mon Jan 28, 2019 2:52 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: lecture notes
- Replies: 1
- Views: 280
lecture notes
does anyone have the lecture notes for (1/28)?
- Fri Jan 25, 2019 12:09 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: determining x for weak acids and bases
- Replies: 6
- Views: 806
Re: determining x for weak acids and bases
This is a side note what is a conjugate base/acid?
- Thu Jan 17, 2019 10:30 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q<K
- Replies: 4
- Views: 1313
Q<K
when Q<K, will more products form because the forward reaction is favored?
- Thu Jan 17, 2019 11:16 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Acid and Base Equilibria
- Replies: 7
- Views: 695
Re: Acid and Base Equilibria
For this week should we be submitting homework from chapter 12?
- Sun Jan 13, 2019 8:17 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equilibrium 1A module
- Replies: 2
- Views: 281
Equilibrium 1A module
While I was taking the module one question asked about when a reaction "lies to the right" and a follow up question asked when the "equilibrium shifted to the right" would both of these wordings produce the same K-value? I feel like I worded this question very weirdly sorry.
- Sun Jan 13, 2019 8:13 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: equilibrium
- Replies: 4
- Views: 432
equilibrium
What does it mean if the "equilibrium sits to the lift" or the "equilibrium sits to the right"?
- Sun Jan 13, 2019 8:12 pm
- Forum: Ideal Gases
- Topic: K value
- Replies: 8
- Views: 875
K value
why is K= 1 rare?
- Thu Jun 14, 2018 1:56 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pH formula
- Replies: 5
- Views: 747
Re: pH formula
alright thank you!
- Thu Jun 14, 2018 11:41 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: 4.7 and 4.9
- Replies: 1
- Views: 207
4.7 and 4.9
In 4.7 the shape of SOCl2 is trigonal pyramidal
in 4.9 the shape of ICl3 is T-shaped.
How do we determine the difference between the two shapes?
in 4.9 the shape of ICl3 is T-shaped.
How do we determine the difference between the two shapes?
- Thu Jun 14, 2018 10:56 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pH formula
- Replies: 5
- Views: 747
pH formula
will we be provided the equation for calculating pH on the final?
- Wed Jun 13, 2018 11:37 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: strong acids
- Replies: 4
- Views: 769
strong acids
In lecture we learned that strong acids are almost completely ionized in a solution. What does that mean?
- Wed Jun 13, 2018 11:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VESPER Theory and Bond types
- Replies: 3
- Views: 706
Re: VESPER Theory and Bond types
I don't believe that you can determine which bond is actually the sigma or the pi bond. I think we just have to focus on what determines making a sigma bond or a pi bond
- Wed Jun 13, 2018 11:11 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionic character
- Replies: 11
- Views: 2166
Re: ionic character
what is the difference between something being ionic or dipole?
- Wed Jun 13, 2018 9:43 pm
- Forum: Lewis Structures
- Topic: lewis structure
- Replies: 10
- Views: 1084
Re: lewis structure
oh ok thank you!
- Wed Jun 13, 2018 8:58 pm
- Forum: Lewis Structures
- Topic: lewis structure
- Replies: 10
- Views: 1084
lewis structure
I'm drawing a blank, when drawing a lewis structure what determines which element goes in the middle?
- Tue Jun 12, 2018 11:33 am
- Forum: Dipole Moments
- Topic: Dipole Moment understanding
- Replies: 5
- Views: 2118
Re: Dipole Moment understanding
the reponses are really helpful regarding dipole movement. So for clarification dipole movement results in the molecule being polar?
- Tue Jun 12, 2018 11:17 am
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: lecture 6/6 [ENDORSED]
- Replies: 3
- Views: 721
Re: lecture 6/6 [ENDORSED]
thank you so much!
Very helpful!
Very helpful!
- Sat Jun 09, 2018 6:45 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: lecture 6/6 [ENDORSED]
- Replies: 3
- Views: 721
lecture 6/6 [ENDORSED]
Hello
I was not able to attend lecture on Wednesday, 6/6. Does anyone possibly have the notes from that lecture?
Thank you!
I was not able to attend lecture on Wednesday, 6/6. Does anyone possibly have the notes from that lecture?
Thank you!
- Tue May 22, 2018 9:09 pm
- Forum: Ionic & Covalent Bonds
- Topic: 3.27 part C
- Replies: 1
- Views: 228
3.27 part C
hello the question asks to give the chemical formula for the following compounds and I understand how to do parts A and B but part C has be confused. The compound is manganese(IV) oxide. The answer is MnO2 but I'm not entirely sure how to get it. I think its the element Mn that is confusing me If an...
- Wed May 09, 2018 8:33 am
- Forum: Trends in The Periodic Table
- Topic: Ionization exceptions [ENDORSED]
- Replies: 8
- Views: 1685
Re: Ionization exceptions [ENDORSED]
what are the ionization exceptions again? and for clarification there are exceptions because these ions are more stable in the exceptions form?
- Mon May 07, 2018 10:32 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: homework week 6
- Replies: 3
- Views: 542
homework week 6
for section this week are able to turn in problems from chapter 2 or chapter 3?
- Wed May 02, 2018 11:21 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Electron configuration
- Replies: 8
- Views: 766
Re: Electron configuration
This clears up a lot! Thank you! Another quick question though for clarification. I know that paired electrons have opposite spins but why do they have opposite spins? Is it due to their charge or is it because no two electrons can have the same four quantum numbers or because of something else? I'...
- Wed May 02, 2018 11:17 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: nodal plane
- Replies: 1
- Views: 274
nodal plane
hello,
In lecture Dr. Lavelle explained that the p-, d-, and f- orbitals have a nodal plane while the s- orbital does not... how do these orbitals have nodal planes?
thank you
In lecture Dr. Lavelle explained that the p-, d-, and f- orbitals have a nodal plane while the s- orbital does not... how do these orbitals have nodal planes?
thank you
- Mon Apr 30, 2018 4:28 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 3d and 4s orbitals
- Replies: 3
- Views: 415
Re: 3d and 4s orbitals
so the 3d orbital is lower in energy than the 4s orbital?
- Sun Apr 29, 2018 8:41 pm
- Forum: DeBroglie Equation
- Topic: homework problems [ENDORSED]
- Replies: 5
- Views: 677
Re: homework problems [ENDORSED]
alright thank you!
- Sun Apr 29, 2018 5:29 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Electron configuration
- Replies: 8
- Views: 766
Re: Electron configuration
in class we had an example of writing the electron configuration of Calcium and we were able to write it as: [Ar]4s^2... why are we able to use Argon to write the electron configuration?
- Sun Apr 29, 2018 5:20 pm
- Forum: DeBroglie Equation
- Topic: homework problems [ENDORSED]
- Replies: 5
- Views: 677
Re: homework problems [ENDORSED]
what problem is that in the textbook?
- Sun Apr 29, 2018 2:34 pm
- Forum: DeBroglie Equation
- Topic: homework problems [ENDORSED]
- Replies: 5
- Views: 677
homework problems [ENDORSED]
hello,
what problems are we able to turn in for homework this week?
what problems are we able to turn in for homework this week?
- Fri Apr 20, 2018 9:27 pm
- Forum: Properties of Light
- Topic: amplitude and intensity
- Replies: 11
- Views: 1115
Re: amplitude and intensity
thank you so much!
- Fri Apr 20, 2018 9:02 pm
- Forum: Properties of Light
- Topic: amplitude and intensity
- Replies: 11
- Views: 1115
amplitude and intensity
Does anyone know if we will be tested on amplitude and intensity on Test 2? Its in section 1.2
thank you :)
thank you :)
- Wed Apr 18, 2018 8:15 am
- Forum: Properties of Light
- Topic: units for frequency and wavelength [ENDORSED]
- Replies: 9
- Views: 780
Re: units for frequency and wavelength [ENDORSED]
thank you!
- Tue Apr 17, 2018 10:32 pm
- Forum: Properties of Light
- Topic: units for frequency and wavelength [ENDORSED]
- Replies: 9
- Views: 780
units for frequency and wavelength [ENDORSED]
what are the proper units for frequency and wavelength?
Thank You!
Thank You!
- Fri Apr 13, 2018 7:54 pm
- Forum: Properties of Light
- Topic: avogadro's number
- Replies: 5
- Views: 744
avogadro's number
in lecture today, Dr. Lavelle mentioned something about having to divide by avogadro's number when regarding the energy it takes to remove an electron. I'm not quite sure why it is we have to divide by avogradro's number or when we would have to. I'm also not sure if this question makes any sense lo...
- Mon Apr 09, 2018 7:52 pm
- Forum: SI Units, Unit Conversions
- Topic: E. 15 help
- Replies: 2
- Views: 233
Re: E. 15 help
that makes sense now thank you for explaining!
- Fri Apr 06, 2018 12:24 pm
- Forum: SI Units, Unit Conversions
- Topic: E. 15 help
- Replies: 2
- Views: 233
E. 15 help
I saw a previous post regarding E. 15 that was very helpful but I am still wondering how do we know we are supposed the 34.02g in order to get the 40.08g which is the molar mass of Ca?
Thank you!
Thank you!
- Fri Apr 06, 2018 10:23 am
- Forum: Molarity, Solutions, Dilutions
- Topic: G. 9 [ENDORSED]
- Replies: 2
- Views: 839
G. 9 [ENDORSED]
hello everyone! I was hoping that someone could possibly explain to me question G. 9 A chemist studying the properties of photographic emulsions needed to prepare 500.0 mL of 0179 m AgNO3 (aq). What mass of silver nitrate must be placed into a 500.0 mL volumetric flask, dissolved, and diluted to the...