Search found 60 matches

by MichaelMoreno2G
Sun Mar 17, 2019 10:39 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Effect of increased concentration on equilibrium
Replies: 9
Views: 153

Re: Effect of increased concentration on equilibrium

What about if the reaction is not at equilibrium? How increasing the concentration affect the equilibrium?
by MichaelMoreno2G
Sun Mar 17, 2019 10:37 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Arrhenius eq
Replies: 3
Views: 44

Re: Arrhenius eq

Yes, as others have stated, we can assume that A=1 unless it is otherwise stated in the problem.
by MichaelMoreno2G
Sun Mar 17, 2019 10:35 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: pKa and pKb
Replies: 4
Views: 58

Re: pKa and pKb

when given pKa and asked for ph, solve for Ka with pKa= -logKa which would mean 10^(-pKa)= Ka Then, if the reaction is acidic, find the Ka equilibrium equation for the reaction Usually, an initial Molarity will be given for the Reactant Once the Ka equation is written, set it equal to the Ka value ...
by MichaelMoreno2G
Fri Mar 15, 2019 10:16 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Equation sheet
Replies: 4
Views: 40

Re: Equation sheet

For what type of questions would we apply the Nernst Equation?
by MichaelMoreno2G
Sat Mar 09, 2019 8:31 pm
Forum: General Rate Laws
Topic: Overall sum
Replies: 7
Views: 75

Re: Overall sum

Can someone explain why we add m and n?
by MichaelMoreno2G
Sat Mar 09, 2019 8:30 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 24
Views: 421

Re: Final

How do you guys study for the final? I still haven't found a study method that works for me and I'm really trying to do my best for this final!
by MichaelMoreno2G
Sat Mar 09, 2019 8:29 pm
Forum: First Order Reactions
Topic: Pseudo Rate Laws
Replies: 1
Views: 29

Re: Pseudo Rate Laws

The first order claims that If the concentration of a reactant remains constant, its concentration can be included in the rate constant. However, i am not too sure about the second order. If someone can clarify that order I would appreciate it.
by MichaelMoreno2G
Sat Mar 09, 2019 8:18 pm
Forum: General Rate Laws
Topic: Rate Laws
Replies: 8
Views: 82

Re: Rate Laws

I'm still confused on why we apply rate laws to certain questions. Can someone explain what a rate law is and why it is useful?
by MichaelMoreno2G
Sun Mar 03, 2019 8:19 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Q and K with the Nernst Equation
Replies: 3
Views: 56

Re: Q and K with the Nernst Equation

You would have to know the values of both, but usually K is given and you solve for Q.
by MichaelMoreno2G
Sun Mar 03, 2019 8:18 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Cell Diagram
Replies: 4
Views: 50

Re: Cell Diagram

I'm not too sure but I believe H+ is included in a cell diagram, but I know for sure H20(l) is not included.
by MichaelMoreno2G
Sun Mar 03, 2019 8:16 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Cell diagram
Replies: 4
Views: 70

Re: Cell diagram

As a follow up to your question, when and why do we add Pt(s) to the ends of a cell diagram?
by MichaelMoreno2G
Sun Mar 03, 2019 8:15 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Melting of ice
Replies: 9
Views: 129

Re: Melting of ice

As mentioned above, Delta G would be less than zero because the reaction is spontaneous.
by MichaelMoreno2G
Sun Feb 24, 2019 8:38 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: q=mCdeltaT
Replies: 11
Views: 243

Re: q=mCdeltaT

What would be the final units for the equations? In other words, if we used moles, what would our final units be, and if we used m, what would our final units be? I get confused with the two.
by MichaelMoreno2G
Sun Feb 24, 2019 8:36 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Test 3
Replies: 14
Views: 172

Re: Test 3

Up to what section of electrochemistry do we need to study? I'm still a little confused so if someone can clarify that would be greatly appreciated.
by MichaelMoreno2G
Sun Feb 24, 2019 8:34 am
Forum: Balancing Redox Reactions
Topic: Test 2 Material
Replies: 13
Views: 152

Re: Test 2 Material

According to Lavelle, the test will cover everything up to Friday's lecture.
by MichaelMoreno2G
Sun Feb 17, 2019 9:41 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: spontaneity
Replies: 3
Views: 46

Re: spontaneity

Spontaneity just means that a chemical process can happen without a major outside force acting on the chemical reaction. There are two outside forces, I believe they are enthalpy and entropy. If there are no major outside forces, as you say, then the only forces acting/producing the spontaneous rea...
by MichaelMoreno2G
Sun Feb 17, 2019 9:38 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: delta G
Replies: 3
Views: 38

Re: delta G

A pretty simple explanation of what delta G indicates is the change in free energy of the system. In an exergonic reaction free energy is released, hence delta g is negative. In an endergonic reaction, free energy is inputed into the system, and delta g is positive.
by MichaelMoreno2G
Sun Feb 17, 2019 9:33 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Nonexpansion Work
Replies: 2
Views: 44

Re: Nonexpansion Work

As you said, Gibbs Free Energy is the maximum amount of non-expansion work that can occur in a closed system.non-expansion work is work not involving pressure and volume, as the person above stated: electrical work.
by MichaelMoreno2G
Thu Feb 07, 2019 6:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 8
Views: 134

Re: Midterm

will all of outline 4 be on the midterm? (including Gibbs Free Energy and the little part of Chapter 11 that is listed on the 6th edition outline) Or are will it be only up to section 9.11 in the sixth edition? I saw someone on another forum post that gibbs free energy will not be on the test, but ...
by MichaelMoreno2G
Thu Feb 07, 2019 6:09 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Study Guides
Replies: 15
Views: 264

Re: Study Guides

ariana_apopei1K wrote:Lyndon is probably going to make one that he'll go over in his review session this monday

Do you know where and what time his review session will be?
by MichaelMoreno2G
Thu Feb 07, 2019 6:09 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Study Guides
Replies: 15
Views: 264

Re: Study Guides

805132275 wrote:Are there any study guide/review sheets the TAs have made available for the midterm?

I know Joyce had a review session and she provided a worksheet that was very helpful. She said she was going to post it online, I just can't seem to find it.
by MichaelMoreno2G
Sun Feb 03, 2019 8:21 pm
Forum: Calculating Work of Expansion
Topic: Units for pressure
Replies: 10
Views: 93

Re: Units for pressure

SydBenedict2H wrote:If its ever in bar, thats more or less equivalent to atm.

Exactly, I remember the professor saying the difference between bar and atm is very small.
by MichaelMoreno2G
Sun Feb 03, 2019 8:20 pm
Forum: Calculating Work of Expansion
Topic: work done by vs on a system
Replies: 5
Views: 68

Re: work done by vs on a system

Katelyn Pham 4E wrote:This is correct. If work is done BY a system, energy is being released making it exothermic resulting in w being negative. If work is done ON a system, w is positive, because it is endothermic and energy is being put into the system.

Thank you for this summarization. It was very helpful.
by MichaelMoreno2G
Sun Feb 03, 2019 8:18 pm
Forum: Calculating Work of Expansion
Topic: Equations for w
Replies: 5
Views: 84

Re: Equations for w

SydBenedict2H wrote:So does this mean we aren't going to have to use the integral formula to calculate anything on tests?

Most likely not, but I would still know it just in case.
by MichaelMoreno2G
Sun Feb 03, 2019 8:17 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Recognizing delta u
Replies: 2
Views: 47

Re: Recognizing delta u

SydBenedict2H wrote:If they mention internal energy then they are referring to delta U and you should use its associated equations.

Is there a specific reason as to why we use the associated equations?
by MichaelMoreno2G
Sat Jan 19, 2019 10:35 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Solving weak acid/base dissociations
Replies: 4
Views: 52

Re: Solving weak acid/base dissociations

Why is using the quadratic equation the only way to solve for a change in concentration?
by MichaelMoreno2G
Sat Jan 19, 2019 10:24 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Understanding Q
Replies: 9
Views: 92

Re: Understanding Q

Can someone clarify what the significance of Q<K is and vice-versa?
by MichaelMoreno2G
Sat Jan 19, 2019 10:22 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1
Replies: 6
Views: 115

Re: Test 1

Was Wednesday's lecture the last new material we learned for the test?
by MichaelMoreno2G
Sat Jan 12, 2019 12:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Solids and Liquids in Rxn
Replies: 6
Views: 96

Re: Solids and Liquids in Rxn

In response to the responses above me, why would solids and liquids not apply to the equilibrium constant?
by MichaelMoreno2G
Sat Jan 12, 2019 12:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium constants
Replies: 2
Views: 49

Re: Equilibrium constants

Personally, I believe equilibrium constants are important because they tell us how reversible a reaction is. For instance, if K>1, the reaction favors products. If K=1, there is an equal amount of products and reactants. If k<1, reactants are favored.
by MichaelMoreno2G
Sat Jan 12, 2019 12:13 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: compression vs pressure
Replies: 6
Views: 265

Re: compression vs pressure

To the comment above me, you said the inverse relationship between volume and pressure only applies to gases. How would it apply to liquids, solids or aqueous solutions?
by MichaelMoreno2G
Fri Dec 07, 2018 2:00 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Replies: 118
Views: 4699

Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]

Thank you for this! The one for the midterm really helped out and I hope this one does too. What will be the final topic covered during the review session?
by MichaelMoreno2G
Sun Dec 02, 2018 6:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentates
Replies: 1
Views: 54

Re: Polydentates

Water is always monodendate because it can only form one dative bond with a metal ion due to the oxygen molecule, which is why it is not bidentate
by MichaelMoreno2G
Sun Dec 02, 2018 6:44 pm
Forum: Naming
Topic: Metal Prefixes
Replies: 2
Views: 70

Re: Metal Prefixes

I feel like that would revolve around memorization, and usually Lavelle stresses the idea of understanding the concepts as opposed to memorization so I doubt it. But hey, you never know. I may be wrong.
by MichaelMoreno2G
Sun Dec 02, 2018 6:42 pm
Forum: Amphoteric Compounds
Topic: Examples
Replies: 6
Views: 80

Re: Examples

I believe Ammonia is one and also bicarbonate
by MichaelMoreno2G
Sun Nov 25, 2018 5:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Xenon Tetrafluoride
Replies: 3
Views: 71

Re: Xenon Tetrafluoride

I've been asking myself the same thing. If someone can please clarify I would greatly appreciate it.
by MichaelMoreno2G
Sun Nov 25, 2018 5:01 pm
Forum: Hybridization
Topic: Hybridization
Replies: 5
Views: 84

Re: Hybridization

I hope we only have to know sp3d2 but i'm not too sure if we have to know any other levels.
by MichaelMoreno2G
Sun Nov 25, 2018 4:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 6
Views: 145

Re: Test 3

Does anyone know the specific topics that will be on the test?
by MichaelMoreno2G
Sun Nov 18, 2018 11:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pair influence on shape
Replies: 12
Views: 148

Re: lone pair influence on shape

Can someone explain the difference between bent and linear?
by MichaelMoreno2G
Sun Nov 18, 2018 5:00 pm
Forum: Resonance Structures
Topic: Polar
Replies: 8
Views: 182

Re: Polar

Can someone explain how we identify if a bond is polar or non-polar?
by MichaelMoreno2G
Sun Nov 18, 2018 4:38 pm
Forum: Resonance Structures
Topic: Resonance structures
Replies: 7
Views: 177

Re: Resonance structures

On a test would be asked to draw the resonance or hybrid structure?
by MichaelMoreno2G
Sun Nov 11, 2018 8:31 pm
Forum: Lewis Structures
Topic: Lewis Structure
Replies: 10
Views: 150

Re: Lewis Structure

For the problems revolving lewis dot structures such as the one from the midterm, where you have to identify which element it is from the given structure, can someone explain how to find it? I was confused on that question.
by MichaelMoreno2G
Sun Nov 11, 2018 8:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm [ENDORSED]
Replies: 14
Views: 393

Re: Midterm [ENDORSED]

Does anyone know when our next test is? I remember someone telling me it would be this upcoming Friday but that seems so soon. If someone knows please let me know, thanks in advance.
by MichaelMoreno2G
Sun Nov 11, 2018 6:29 pm
Forum: Electronegativity
Topic: Electronegativity and Noble Gases
Replies: 3
Views: 46

Re: Electronegativity and Noble Gases

I'm not too sure but I believe that since the noble gases already have eight electrons, they don't wan't to attract any more electrons. Therefore because electronegativity measures the attraction between an atom and an electron, noble gases do not have electronegativity.
by MichaelMoreno2G
Sun Nov 04, 2018 10:58 am
Forum: Electronegativity
Topic: What are the trends useful for?
Replies: 12
Views: 141

Re: What are the trends useful for?

Can someone explain why we use [Ar]
by MichaelMoreno2G
Sun Nov 04, 2018 10:52 am
Forum: General Science Questions
Topic: Test 1 and Two Answer Key?
Replies: 1
Views: 78

Test 1 and Two Answer Key?

Does anyone have the answer key or know if there even is an answer key for test one and two? I got some questions wrong and i want to see how they are properly done
by MichaelMoreno2G
Sun Nov 04, 2018 10:06 am
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 4713

Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]

The review session on Saturday that went over this practice midterm really helped prepare me for the exam, thank you.
by MichaelMoreno2G
Sun Oct 28, 2018 9:40 pm
Forum: *Shrodinger Equation
Topic: Application of Equation on test
Replies: 5
Views: 198

Re: Application of Equation on test

I was also worried about this prior to the exam but thankfully we did not have to use it on the exam
by MichaelMoreno2G
Sun Oct 28, 2018 9:35 pm
Forum: General Science Questions
Topic: Khan Academy
Replies: 10
Views: 293

Re: Khan Academy

I also continue to get emails from a website called "OneClass" that tends to have study guides for previous midterms etc. I'm wondering if anyone has actually used the website. But on another note, Khan Academy really helped me as an extra source to study for test 2.
by MichaelMoreno2G
Sun Oct 28, 2018 9:32 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 4s becomes higher energy
Replies: 3
Views: 176

Re: 4s becomes higher energy

I also had a similar question regarding this, if someone can please answer I would greatly appreciate you.
by MichaelMoreno2G
Sun Oct 21, 2018 10:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Session Worksheet (Monday + Friday, Hannah) [ENDORSED]
Replies: 37
Views: 1535

Re: Step Up Session Worksheet (Monday + Friday, Hannah) [ENDORSED]

Chem_Mod wrote:Here is the answer key for Week 2 Topics Step Up Worksheet!

Honestly, thank you so much for these. I feel like this is really good review for me as I tend to learn more from seeing how a problem is actually done. I look forward to attending one of your step up sessions.
by MichaelMoreno2G
Sun Oct 21, 2018 10:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 96
Views: 30706

Re: Advice from a Medical Student [ENDORSED]

Although this is over a year old, I really appreciate seeing posts like this. You're right, this class can be overwhelming and it's barely about to be week 4. Although you may never see this, thank you for posting this. I needed this inspiration for the upcoming test.
by MichaelMoreno2G
Sun Oct 21, 2018 9:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Test On Tuesday
Replies: 10
Views: 399

Re: Test On Tuesday

I wouldn't doubt it since it's in the outline. However, if there were to be a question regarding that section it shouldn't be too hard (I hope).
by MichaelMoreno2G
Sun Oct 14, 2018 6:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Session Worksheet (Monday + Friday, Hannah) [ENDORSED]
Replies: 37
Views: 1535

Re: Step Up Session Worksheet (Monday + Friday, Hannah) [ENDORSED]

Will your sessions be every Friday and Monday for the rest of the quarter? Or just for this week?
by MichaelMoreno2G
Sun Oct 14, 2018 6:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 825515

Re: Post All Chemistry Jokes Here

Q: Do you know any organic chemistry jokes?
A: I know Alkynes
by MichaelMoreno2G
Sat Oct 13, 2018 6:13 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation
Replies: 5
Views: 86

Re: DeBroglie Equation

To the reply above this, why don't larger objects have a wave-like properties that can be measured?
by MichaelMoreno2G
Sun Oct 07, 2018 11:42 am
Forum: Significant Figures
Topic: Rounding Using Significant Figures
Replies: 10
Views: 350

Re: Rounding Using Significant Figures

Thanks for that explanation Tim. I was also confused on how to round using sig figs but I feel like your explanation actually helped. I'm just curious if we will lose points on tests/exams if we round to the incorrect decimal point.
by MichaelMoreno2G
Sun Oct 07, 2018 11:37 am
Forum: SI Units, Unit Conversions
Topic: mol vs. mmol
Replies: 12
Views: 338

Re: mol vs. mmol

In an exam would we ever have to convert from mol to mmol or vice-versa?

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