Search found 61 matches
- Mon Mar 11, 2019 1:10 am
- Forum: Administrative Questions and Class Announcements
- Topic: Final
- Replies: 18
- Views: 2059
Re: Final
I don't think there is an exact percentage but I believe anything that we covered after the midterm will be heavily on the final
- Mon Mar 11, 2019 1:08 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Final Exam
- Replies: 23
- Views: 1821
Re: Final Exam
The final is cumulative therefore it will be on everything we learned this quarter.
- Mon Mar 11, 2019 1:07 am
- Forum: Zero Order Reactions
- Topic: Integration/Derivation
- Replies: 3
- Views: 537
Re: Integration/Derivation
I don't think so, I believe they come back to the equations given to us.
- Fri Mar 08, 2019 7:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Review
- Replies: 3
- Views: 483
Midterm Review
I wasn't able to go to class, did Lavelle finalize the rooms for the midterm review? Do you know if it's uploaded on his website.
- Fri Mar 08, 2019 8:30 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: k & K
- Replies: 18
- Views: 2203
k & K
What is the difference between k in kinetics and K in equilibrium/ thermo?
- Thu Mar 07, 2019 12:46 am
- Forum: Administrative Questions and Class Announcements
- Topic: Homework for Week 9
- Replies: 3
- Views: 470
Homework for Week 9
Does anyone know if there is a specific topic we should do our homework on?
- Thu Mar 07, 2019 12:44 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Pt
- Replies: 14
- Views: 1364
Re: Pt
You add it when there is no solid present or a solid that can't react. It is needed for your cell diagram.
- Thu Mar 07, 2019 12:42 am
- Forum: Van't Hoff Equation
- Topic: test 2
- Replies: 7
- Views: 1133
Re: test 2
How do we know when we have to use that equation?
- Mon Mar 04, 2019 12:37 am
- Forum: Balancing Redox Reactions
- Topic: Ecell
- Replies: 4
- Views: 485
Re: Ecell
ran2000 wrote:You always flip the anode reaction. You can usually determine the anode reaction by choosing the reaction which has the lowest reduction potential (more negative and less positive)
How do you exactly figure out the lowest reduction potential?
- Mon Mar 04, 2019 12:36 am
- Forum: General Rate Laws
- Topic: Calculus Review
- Replies: 8
- Views: 957
Re: Calculus Review
I don't think we actually need them. From what I understood he only did it so you can see how he got the final equations.
- Mon Mar 04, 2019 12:34 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Finding n
- Replies: 12
- Views: 1128
Re: Finding n
Yes, it is the amount of electrons added on both sides (of course they should be the same number).
- Mon Mar 04, 2019 12:31 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Pt(s)
- Replies: 10
- Views: 1071
Re: Pt(s)
When there is no solid or metal present.
- Mon Mar 04, 2019 12:30 am
- Forum: Balancing Redox Reactions
- Topic: Cell diagrams
- Replies: 8
- Views: 817
Re: Cell diagrams
If there is no solid or metal added they include Pt or C in order for it to work.
- Mon Mar 04, 2019 12:27 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Delta G rules
- Replies: 8
- Views: 783
Re: Delta G rules
when delta G is positive it is nonspontaneous, when it is negative it is spontaneous and if it equals 0 it is at equilibrium
- Mon Mar 04, 2019 12:25 am
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 24
- Views: 2227
Re: Final
Lavelle usually announces it in class the week it starts.
- Mon Mar 04, 2019 12:24 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Does anyone know if test 2 will be curved?
- Replies: 15
- Views: 3018
Re: Does anyone know if test 2 will be curved?
I believe it will not be since there is already basically a curve in Lavelle's grading scheme.
- Mon Mar 04, 2019 12:21 am
- Forum: Balancing Redox Reactions
- Topic: oxidizing agent and reducing agent
- Replies: 15
- Views: 1375
Re: oxidizing agent and reducing agent
The reduced molecule is the oxidizing agent and the oxidized molecule is the reducing agent. They are inversely related.
- Tue Feb 26, 2019 2:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Topics for Test2
- Replies: 1
- Views: 305
Topics for Test2
Up to what day of material will the test cover?
- Tue Feb 26, 2019 1:59 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: E˚ vs E
- Replies: 13
- Views: 15652
E˚ vs E
What is the difference between E˚and E?
- Tue Feb 05, 2019 2:50 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Examples of Open Closed Isolated
- Replies: 5
- Views: 2073
Re: Examples of Open Closed Isolated
An open system: an open water bottle
A closed system: a closed water bottle or pot
An isolated system: I'm not exactly sure but I believe a hydroflask can be an isolated system
A closed system: a closed water bottle or pot
An isolated system: I'm not exactly sure but I believe a hydroflask can be an isolated system
- Tue Feb 05, 2019 2:46 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Midterm [ENDORSED]
- Replies: 49
- Views: 4902
Re: Midterm [ENDORSED]
In my opinion it would be doing the homework and being able to understand the concepts. Also if you can go to the review sessions/ step-up sessions you should definitely do it because they're super helpful.
- Tue Feb 05, 2019 2:43 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ignoring x
- Replies: 16
- Views: 3357
Re: ignoring x
When k is equal to or less than 10^3.
- Tue Feb 05, 2019 2:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Midterm
- Replies: 12
- Views: 2160
Re: Midterm
Best way to study is by doing the homework. If you understand the homework and understand the concepts you should be good. Also if you can get access to past exams that will help.
- Sun Jan 27, 2019 10:17 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: ICE
- Replies: 19
- Views: 1504
Re: ICE
concentration at equilibrium. You can figure that out by adding I and C.
- Sun Jan 27, 2019 10:15 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: What not to count
- Replies: 9
- Views: 915
Re: What not to count
This would be anything that is in the liquid or solid state, everything else is counted. Same goes when looking for K.
- Sun Jan 27, 2019 9:47 pm
- Forum: Ideal Gases
- Topic: Approximations for ICE
- Replies: 20
- Views: 1644
Re: Approximations for ICE
When K is less than 10^-3
- Sun Jan 27, 2019 9:46 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3505
Re: kc vs kp
You can use them interchangeably, difference is that Kc is used for concentration while Kp is used for pressure.
- Sun Jan 27, 2019 9:30 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy signs
- Replies: 13
- Views: 1721
Re: Enthalpy signs
If it's positive it's endothermic and if it's negative it's exothermic.
- Thu Jan 10, 2019 7:46 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Reaction quotient [ENDORSED]
- Replies: 4
- Views: 440
Reaction quotient [ENDORSED]
I was doing the homework and I came across a problem where the reactants had both gases and liquids and the products were only solid. I am aware the formulas is [products]/[reactants] but in this case do we not use the reactants?
- Thu Jan 10, 2019 10:24 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Writing Equilibrium Expressions
- Replies: 3
- Views: 211
Writing Equilibrium Expressions
When writing the equilibrium expression does it matter whether we use brackets or parenthesis?
- Fri Dec 07, 2018 5:44 pm
- Forum: Hybridization
- Topic: Sigma and pi bonds
- Replies: 5
- Views: 539
Sigma and pi bonds
I’m not sure if I was the only one to hear this, or if I misunderstood; but did Dr. Lavelle say during lecture that we didn’t have to worry about the hybridization of pi bonds and sigma bonds?
- Fri Dec 07, 2018 1:25 am
- Forum: General Science Questions
- Topic: Final Exam
- Replies: 5
- Views: 857
Re: Final Exam
Max Kwon 1J wrote:It is cumulative, so it will probably be a question from each section/topic, but each question has multiple subsections (a,b,c, etc.)
How do you figure out when it has a higher boiling point?
- Fri Dec 07, 2018 1:04 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: H-bonds
- Replies: 4
- Views: 469
H-bonds
Are H-bonds polar or non-polar? How do you know, I need an explanation please.
- Fri Dec 07, 2018 12:59 am
- Forum: Naming
- Topic: Chloro v/s chlorido
- Replies: 6
- Views: 845
Re: Chloro v/s chlorido
They are both the same thing. I know chlorido is the new one but they will be accepting both.
- Fri Dec 07, 2018 12:58 am
- Forum: General Science Questions
- Topic: Final Exam
- Replies: 5
- Views: 857
Final Exam
Do you guys think that there will be a lot of melting point or boiling point questions on the exam? Or what do you think he'll ask?
- Fri Dec 07, 2018 12:56 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 7
- Views: 319
Polarity
How do you determine whether the Lewis Structure is polar or nonpolar?
- Thu Dec 06, 2018 4:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent Structures
- Replies: 12
- Views: 1301
Re: Bent Structures
Yes they are all polar because they have lone pairs that won't cancel out.
- Thu Dec 06, 2018 4:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Exam
- Replies: 22
- Views: 1666
Re: Final Exam
I am assuming it is cumulative since he is basing it off of the syllabus.
- Thu Dec 06, 2018 4:36 pm
- Forum: Student Social/Study Group
- Topic: Studying
- Replies: 7
- Views: 934
Re: Studying
michellebui_3L wrote:Attend review sessions and going to office hours; doing the homework problems and modules.
Have you found all the review sessions helpful so far?
- Thu Dec 06, 2018 4:34 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarizing
- Replies: 1
- Views: 223
Polarizing
How do we determine which atom is the most polarizable and also their polarizing power?
- Thu Dec 06, 2018 4:30 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Intermolecular Forces
- Replies: 1
- Views: 220
Intermolecular Forces
How do we determine the intermolecular forces? Also how many are there and how do you tell the difference between them?
- Wed Nov 28, 2018 10:24 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw shape
- Replies: 3
- Views: 396
Seesaw shape
If I were to say that the bond angle is <90 and <180 is that correct? I know that it is between 90 and 120 but aren't 90 and 180 a bond angle as well?
- Mon Nov 19, 2018 12:00 am
- Forum: Administrative Questions and Class Announcements
- Topic: Workshops
- Replies: 5
- Views: 766
Re: Workshops
I'm pretty sure there will be some maybe up until Tuesday and possibly Wednesday.
- Sun Nov 18, 2018 11:57 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Pi bonds and sigma bonds
- Replies: 5
- Views: 496
Pi bonds and sigma bonds
What do each of the bonds determine when you draw them out?
- Wed Nov 14, 2018 10:21 pm
- Forum: Lewis Structures
- Topic: Formal Charge
- Replies: 14
- Views: 1317
Re: Formal Charge
Like others have said, with formal charge your most stable Lewis structure is when they all have a FC of 0, but if that isn't possible you usually want your central atom to have a formal charge of 0 for it to be stable.
- Mon Nov 12, 2018 1:22 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 12
- Views: 1298
Re: Formal Charge
WilliamNguyen_4D wrote:Last test I just drew the most stable form of the lewis structure. I wrote all the calculations. If they ask for resonance then I think you should draw the resonance structures.
What's the difference between the Lewis structure and the resonance structure?
- Mon Nov 12, 2018 1:13 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Dipoles
- Replies: 5
- Views: 467
Dipoles
What are dipoles and how do we determine them?
- Mon Nov 12, 2018 1:01 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Energy of Bonds
- Replies: 3
- Views: 375
Energy of Bonds
How do we determine the energy of each bond? For example when we did the Lewis structure of Benzene in one of the double bonds we put it was 1.34 A and the single bond was 1.54 A.
- Sat Nov 03, 2018 5:46 pm
- Forum: Student Social/Study Group
- Topic: Sig Figs on Midterm
- Replies: 13
- Views: 1591
Re: Sig Figs on Midterm
I think he will, it's always better to be safe than sorry, especially since we aren't taking our test in our discussion sections.
- Sat Nov 03, 2018 5:44 pm
- Forum: Lewis Structures
- Topic: Lewis Acids and Bases
- Replies: 5
- Views: 400
Re: Lewis Acids and Bases
From what I understood, a Lewis Acid takes electrons while a Lewis Base donates electrons. I know that for the midterm that's all we need to know.
- Sat Nov 03, 2018 5:41 pm
- Forum: SI Units, Unit Conversions
- Topic: Unit Conversions
- Replies: 3
- Views: 449
Unit Conversions
Does anyone know of an easy way to remember the conversions?
- Wed Oct 31, 2018 11:26 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Hw #2.51 6th edition
- Replies: 1
- Views: 155
Hw #2.51 6th edition
How many unpaired electrons are predicted for the ground-state configuration of each of the following atoms: a) Bi, b) Si, c) Ta, d) Ni?
How exactly do we figure this out?
How exactly do we figure this out?
- Sun Oct 28, 2018 9:13 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Ionization Energy
- Replies: 2
- Views: 301
Ionization Energy
Can someone please explain to me ionization energy?
- Sun Oct 21, 2018 9:25 pm
- Forum: Properties of Electrons
- Topic: ml
- Replies: 5
- Views: 568
Re: ml
You can definitely use a cursive l, that's what I use because I too confuse it with a 1. But for ml it determines the number of orbitals and the orientation within a subshell. Ml is dependent on l. So for example if l=2, ml would be -2,-1,0,1,2. I don't know if this is any help.
- Sun Oct 21, 2018 9:16 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Wave Functions
- Replies: 4
- Views: 403
Wave Functions
I'm confused as to how you determine if the subscript will be x, y, or z. We did an example in class that had the wave function of (3,1,0) and we got 3py but where did the 'y' come from?
- Sun Oct 14, 2018 5:04 pm
- Forum: DeBroglie Equation
- Topic: De Broglie Equation Example
- Replies: 4
- Views: 464
De Broglie Equation Example
On Friday's lecture we had the worked example: If you are driving a 1.50*10^3 kg car at 27.0 ms^-1, what is the Broglie wavelength of your car? Does your car have nay measurable wavelike properties? I understood how to get the Broglie wavelength but to the second part why was the answer no?
- Sun Oct 14, 2018 4:58 pm
- Forum: Properties of Light
- Topic: Speed of Light
- Replies: 41
- Views: 2850
Re: Speed of Light
It's assumed to be a constant and from my knowledge I believe we will be given the constant.
- Thu Oct 11, 2018 1:20 am
- Forum: Limiting Reactant Calculations
- Topic: M5 [ENDORSED]
- Replies: 1
- Views: 301
M5 [ENDORSED]
Solve this exercise without using a calculator. The reaction 6 ClO21g2 2 BrF31l2 S 6 ClO2F1s2 Br21l2 is carried out with 12 mol ClO2 and 5 mol BrF3. (a) Identify the excess reactant.(b) Estimate how many moles of each product will be produced and how many moles of the excess reactant will remain...
- Sun Oct 07, 2018 1:52 pm
- Forum: Properties of Light
- Topic: Proving c=Δv
- Replies: 1
- Views: 219
Proving c=Δv
In Friday's lecture Dr. Lavelle gave us the reasoning behind why we could prove the equation. All I got was that the frequency doubles, but what happens after it doubles?
- Sun Oct 07, 2018 1:48 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: E1
- Replies: 3
- Views: 218
E1
E.1 The field of nanotechnology offers some intriguing possibilities, such as the creation of fibers one atom wide. Suppose you were able to string together 1.00 mol Ag atoms, each of radius 144 pm, into one of these fibers by encapsulating them in carbon nanotubes (see Chapter 7). How long would th...
- Mon Oct 01, 2018 8:09 pm
- Forum: Balancing Chemical Reactions
- Topic: Law of Conservation of Mass [ENDORSED]
- Replies: 7
- Views: 1075
Re: Law of Conservation of Mass [ENDORSED]
It's basically that mass can't be created nor destroyed. The matter may not change, there is just a rearrangements of atoms in a chemical reaction with the same mass in both the product and the reactants.