Search found 67 matches

by Jasmine Botello 2F
Sun Mar 18, 2018 9:24 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Pt electrode
Replies: 2
Views: 175

Re: Pt electrode

You add it when there is no solid on that side of the cell diagram. So if there is already a solid then you don't add it.
by Jasmine Botello 2F
Sat Mar 17, 2018 12:13 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.103
Replies: 2
Views: 178

Re: 9.103

For this question does anyone know where they got the values from??
by Jasmine Botello 2F
Thu Mar 15, 2018 11:35 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: HW 14.15
Replies: 1
Views: 68

Re: HW 14.15

I think it is because they are both in the same state. But can someone please confirm this?
by Jasmine Botello 2F
Tue Mar 13, 2018 11:07 am
Forum: Balancing Redox Reactions
Topic: Winter 2013 final Q4
Replies: 9
Views: 345

Re: Winter 2013 final Q4

Here is the question
by Jasmine Botello 2F
Mon Mar 12, 2018 10:27 am
Forum: Balancing Redox Reactions
Topic: Half-reactions
Replies: 4
Views: 136

Half-reactions

Are we always supposed to flip one of the half-reactions to give you the MOST positive E value?
by Jasmine Botello 2F
Mon Mar 12, 2018 10:26 am
Forum: Balancing Redox Reactions
Topic: Winter 2013 final Q4
Replies: 9
Views: 345

Winter 2013 final Q4

For this question, I know how to calculate everything except n. Could someone please explain how they got n because it does not explain that part? Is it the half reactions? because those are not given either...
by Jasmine Botello 2F
Mon Mar 12, 2018 9:23 am
Forum: Experimental Details
Topic: Final [ENDORSED]
Replies: 4
Views: 288

Final [ENDORSED]

Is this topic going to be on the final?
by Jasmine Botello 2F
Wed Mar 07, 2018 10:09 am
Forum: First Order Reactions
Topic: Pseudo orders
Replies: 3
Views: 109

Re: Pseudo orders

how would you identify them?
by Jasmine Botello 2F
Wed Mar 07, 2018 10:01 am
Forum: First Order Reactions
Topic: Pseudo orders
Replies: 3
Views: 109

Pseudo orders

Are there any homework problems in the textbook that talk about this because I feel like I need practice on this or is it more of a conceptual thing??
by Jasmine Botello 2F
Wed Mar 07, 2018 9:50 am
Forum: Zero Order Reactions
Topic: zero order rate?
Replies: 14
Views: 427

Re: zero order rate?

i'm a little confused.. how is [A] different from ln[A] or 1/[A]?
by Jasmine Botello 2F
Wed Mar 07, 2018 9:26 am
Forum: Zero Order Reactions
Topic: zero order rate?
Replies: 14
Views: 427

zero order rate?

In my notes, I wrote down that for a zero order the rate does not depend on concentration.. is this correct or did I write down incorrect information??
by Jasmine Botello 2F
Thu Mar 01, 2018 1:23 pm
Forum: First Order Reactions
Topic: 15.21
Replies: 3
Views: 210

Re: 15.21

I think my TA told me that it does not necessarily have to be concentration. As long as you keep it the same throughout the problem.
by Jasmine Botello 2F
Thu Mar 01, 2018 10:03 am
Forum: Second Order Reactions
Topic: Example?
Replies: 4
Views: 129

Example?

What’s a real life example of a second order reaction?
by Jasmine Botello 2F
Thu Mar 01, 2018 10:01 am
Forum: General Rate Laws
Topic: Differential vs integrated
Replies: 2
Views: 87

Differential vs integrated

What’s the significant difference between differential and integrated and when do you use either of the equations?
by Jasmine Botello 2F
Thu Mar 01, 2018 10:00 am
Forum: Zero Order Reactions
Topic: Zero order common?? [ENDORSED]
Replies: 5
Views: 135

Zero order common?? [ENDORSED]

Is zero order common or uncommon???
by Jasmine Botello 2F
Thu Feb 22, 2018 7:17 pm
Forum: General Rate Laws
Topic: 15.3(c)
Replies: 2
Views: 113

15.3(c)

For this part of the question, it asks "What is the unique rate of the reaction" and I am not really sure what it is asking me to find..?
by Jasmine Botello 2F
Tue Feb 20, 2018 8:44 pm
Forum: Balancing Redox Reactions
Topic: Balancing number of electrons
Replies: 10
Views: 269

Re: Balancing number of electrons

Yes because you want to make sure that the electrons cancel out when you write the final balanced redox reaction.
by Jasmine Botello 2F
Tue Feb 20, 2018 8:43 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram
Replies: 3
Views: 78

Re: Cell Diagram

I think if they are in the same state then you can use commas. However, whenever there is a solid and another state involved, you have to put the line.
by Jasmine Botello 2F
Sun Feb 18, 2018 7:08 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Reduction Potential Values
Replies: 2
Views: 67

Re: Standard Reduction Potential Values

Ammar Amjad 1L wrote:Appendix 2B: Standard Potentials at 25 celsius

Thank you!!!!
by Jasmine Botello 2F
Sun Feb 18, 2018 3:47 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Reduction Potential Values
Replies: 2
Views: 67

Standard Reduction Potential Values

Does anyone know where in the book we find these values??
by Jasmine Botello 2F
Sun Feb 18, 2018 3:34 pm
Forum: Balancing Redox Reactions
Topic: 14.9
Replies: 1
Views: 70

14.9

For this question it tell you to find DG and i understand that you are supposed to use the equation DG=-nFE but i am not sure how the solutions manual got the value of n.. can someone help to explain that please. Thank you.
by Jasmine Botello 2F
Thu Feb 15, 2018 10:09 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: log vs. ln [ENDORSED]
Replies: 2
Views: 117

log vs. ln [ENDORSED]

I have seen some NERNST equations with logQ and others with lnQ... is there a difference or is it just a change of constants when using one or the other?
by Jasmine Botello 2F
Thu Feb 15, 2018 9:58 am
Forum: Balancing Redox Reactions
Topic: electrons
Replies: 3
Views: 85

electrons

when you separate the redox reaction into the half reactions, should the electrons be put in both half reactions?
by Jasmine Botello 2F
Thu Feb 15, 2018 9:57 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Reduction Potential
Replies: 1
Views: 51

Standard Reduction Potential

The value for standard reduction potential will always be a given right?
by Jasmine Botello 2F
Thu Feb 08, 2018 10:33 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.83 moles
Replies: 1
Views: 76

Re: 9.83 moles

I think it is because HBr has a coefficient of 2 in front of it.
by Jasmine Botello 2F
Tue Feb 06, 2018 10:29 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: constant pressure and constant volume
Replies: 3
Views: 93

constant pressure and constant volume

I am very confused because I am doing problems in which some say constant volume = 5/2R and others say constant pressure is 5/2R. Isn't one of these supposed to be 3/2R??
by Jasmine Botello 2F
Tue Feb 06, 2018 9:57 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Differing Equations Used For delta S with Change in Temperature
Replies: 3
Views: 123

Re: Differing Equations Used For delta S with Change in Temperature

I think it just depends on how the problem is worded. For example, for #13, it states that it is ideal behavior. For #19, it gives the "molar heat capacities at constant pressure" which is equivalent to Cp,m. For #43, it just states that it is at constant pressure, which is equivalent to C...
by Jasmine Botello 2F
Tue Feb 06, 2018 9:49 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode vs. Cathode
Replies: 2
Views: 112

Anode vs. Cathode

In Monday's lecture, Lavelle explained how the anode is the negative side and the cathode would be the positive side. However, in my biology class, when we were discussing gel electrophoresis, the anode was the positive side and the cathode was the negative side. Is there a difference between the tw...
by Jasmine Botello 2F
Mon Feb 05, 2018 5:25 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Equations
Replies: 4
Views: 125

Re: Equations

We are usually given the equations on the formula sheet so knowing how to derive should not be required.
by Jasmine Botello 2F
Mon Feb 05, 2018 5:22 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Sig Figs
Replies: 6
Views: 108

Re: Sig Figs

Try to see what the lowest sig figs are in the problem given if that makes sense.
by Jasmine Botello 2F
Mon Feb 05, 2018 5:19 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Q vs. K
Replies: 2
Views: 76

Q vs. K

This is probably from 14A but are both Q and K raised to their coefficients or is it just K?
by Jasmine Botello 2F
Thu Feb 01, 2018 12:29 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Adiabatic [ENDORSED]
Replies: 4
Views: 160

Adiabatic [ENDORSED]

So just to make sure, this means that q=0, meaning that only work is being done by or on the system? I feel like my resoning might be wrong.
by Jasmine Botello 2F
Thu Feb 01, 2018 12:20 pm
Forum: Calculating Work of Expansion
Topic: Expansion
Replies: 3
Views: 117

Expansion

When the temperature is constant and pressure and volume are both changing, this means that work is being done BY the system right? aka expansion? or am I missing something?
by Jasmine Botello 2F
Thu Feb 01, 2018 12:07 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: DeltaS= q(rev)/T
Replies: 1
Views: 83

DeltaS= q(rev)/T

What determines whether q is reversible or irreversible??
by Jasmine Botello 2F
Thu Jan 25, 2018 8:30 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Chem 14A final
Replies: 2
Views: 138

Chem 14A final

I was not sure where to post this but does anyone know when we will be able to see our finals from last quarter???
by Jasmine Botello 2F
Mon Jan 22, 2018 4:21 pm
Forum: Phase Changes & Related Calculations
Topic: 8.87 Temperatures
Replies: 5
Views: 157

Re: 8.87 Temperatures

I think it is because 0 degrees is the melting point and 100 degrees is the boiling point and those are like important states.
by Jasmine Botello 2F
Mon Jan 22, 2018 2:05 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: N: number of particle [ENDORSED]
Replies: 4
Views: 129

N: number of particle [ENDORSED]

In today’s lecture, Lavelle was explaining about N being the number of particles that can occupy the states but I’m confused on the last example that he gave about the CO molecules and why he put N=4 instead of N=2

Thank you
by Jasmine Botello 2F
Wed Jan 17, 2018 6:56 pm
Forum: Phase Changes & Related Calculations
Topic: 8.31
Replies: 2
Views: 112

Re: 8.31

If this is specific heat then i think specific heat is always given but im not sure
by Jasmine Botello 2F
Wed Jan 17, 2018 6:52 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Enthalpy Equation
Replies: 3
Views: 162

Re: Enthalpy Equation

PdeltaV represents work. so the equation would be deltaU= q+w and w=-PdeltaV.
by Jasmine Botello 2F
Wed Jan 17, 2018 6:48 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Question 8.29
Replies: 2
Views: 105

Re: Question 8.29

More complex molecules have higher specific/molar heat capacity because they have more atoms present
by Jasmine Botello 2F
Wed Jan 10, 2018 7:57 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Equations
Replies: 6
Views: 215

Equations

what are some general equations that we should know for like heat of fusion or heat of vaporization?
by Jasmine Botello 2F
Wed Jan 10, 2018 5:40 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: tables in chapter 8
Replies: 5
Views: 187

tables in chapter 8

will we be given tables like 8.3 on tests or are we supposed to memorize specific important values?
by Jasmine Botello 2F
Wed Jan 10, 2018 5:35 pm
Forum: Phase Changes & Related Calculations
Topic: chapter 8
Replies: 6
Views: 230

chapter 8

so chapter 8 starts with thermodynamics and Lavelle is starting with thermochemistry, right?
by Jasmine Botello 2F
Mon Jan 08, 2018 4:29 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: aqueous equilibria
Replies: 2
Views: 301

aqueous equilibria

are we gonna go over this topic at all since we didn't go over it last quarter?
by Jasmine Botello 2F
Wed Dec 06, 2017 8:37 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: negligible rule [ENDORSED]
Replies: 3
Views: 292

negligible rule [ENDORSED]

So when K is small enough, then X can be negligible. Does this apply only to weak acids and bases or any type of reaction?
by Jasmine Botello 2F
Wed Dec 06, 2017 8:34 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 12.23 [ENDORSED]
Replies: 7
Views: 354

Re: 12.23 [ENDORSED]

I think that as long as the temp stays the same throughout the problem then it should not cause any changes in the way that you do the problem.
by Jasmine Botello 2F
Wed Nov 29, 2017 10:35 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Test 4 [ENDORSED]
Replies: 4
Views: 240

Test 4 [ENDORSED]

Is this topic supposed to be in test 4? I do not remember ever talking about it in class but I have heard from other students that we are required to know this.

Thank You!
by Jasmine Botello 2F
Tue Nov 28, 2017 5:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: chapter 4
Replies: 1
Views: 101

chapter 4

"Describe the structure of a molecule, cation, or anion in terms of hybrid orbitals and sigma and
pi bonds"

can someone please explain this to me?
by Jasmine Botello 2F
Mon Nov 20, 2017 6:45 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Binding
Replies: 1
Views: 134

Binding

Is it not possible there not to be a binding site when there is a double bond??
by Jasmine Botello 2F
Mon Nov 20, 2017 6:42 pm
Forum: Biological Examples
Topic: Ligands [ENDORSED]
Replies: 3
Views: 301

Ligands [ENDORSED]

Is it necessary to memorize the charges of the ligands?
by Jasmine Botello 2F
Tue Nov 14, 2017 4:42 pm
Forum: Dipole Moments
Topic: dipole moment arrows [ENDORSED]
Replies: 2
Views: 151

Re: dipole moment arrows [ENDORSED]

Yes, the arrow will always point to the most electronegative atom because the electrons are being pulled in that direction. To figure out whether a molecule is polar or non polar you need to figure out whether the dipole moments cancel. It is possible that the dipole moments will be in the same dir...
by Jasmine Botello 2F
Mon Nov 13, 2017 12:29 pm
Forum: Dipole Moments
Topic: dipole moment arrows [ENDORSED]
Replies: 2
Views: 151

dipole moment arrows [ENDORSED]

the arrow always points to the most electronegative right??
and when they point in the same direction it is polar?
and when they point in opposite directions its nonpolar?
by Jasmine Botello 2F
Mon Nov 13, 2017 12:18 pm
Forum: Sigma & Pi Bonds
Topic: # of sigma and pi bonds [ENDORSED]
Replies: 4
Views: 248

# of sigma and pi bonds [ENDORSED]

So there is always one sigma bond and then all other bonds created after that are going to be pi bonds??
by Jasmine Botello 2F
Tue Nov 07, 2017 4:35 pm
Forum: Bond Lengths & Energies
Topic: Bond Lengths [ENDORSED]
Replies: 8
Views: 430

Re: Bond Lengths [ENDORSED]

are we supposed to know about pi bonds for the midterm?? I do not remember going over them in class.
by Jasmine Botello 2F
Tue Nov 07, 2017 4:08 pm
Forum: Electronegativity
Topic: electronegativity chart
Replies: 11
Views: 567

electronegativity chart

Is it necessary to know or memorize the electronegativity chart in the book? It is figure 3.12 in the book. Will we be asked questions that require these specific values? or should we just know the trend?

Thank You!
by Jasmine Botello 2F
Mon Oct 30, 2017 1:17 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Chapter 2, #43 [ENDORSED]
Replies: 3
Views: 236

Re: Chapter 2, #43 [ENDORSED]

This follows the patterns of Copper. The reason is to make it more stable. When going to the next element, you would then fill the s subshell.
by Jasmine Botello 2F
Mon Oct 30, 2017 1:04 pm
Forum: Lewis Structures
Topic: HW 3.19 [ENDORSED]
Replies: 4
Views: 298

Re: HW 3.19 [ENDORSED]

When it is asking for electron pairs it is always helpful to draw out the orbital diagram so that you have a visual representation of it. Remember Pauli's rule and Hund's rule.
by Jasmine Botello 2F
Mon Oct 23, 2017 12:34 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy [ENDORSED]
Replies: 1
Views: 104

Ionization Energy [ENDORSED]

Why does the ionization energy decrease down a group? And why does it increase across a period? I don't fully understand why.
by Jasmine Botello 2F
Mon Oct 23, 2017 12:31 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Orbitals and quantum numbers [ENDORSED]
Replies: 2
Views: 148

Re: Orbitals and quantum numbers [ENDORSED]

Just remember that each l value corresponds to the orbitals.
l=0 corresponds to s
l=1 corresponds to p
l=2 corresponds to d
l=3 corresponds to f
by Jasmine Botello 2F
Mon Oct 16, 2017 7:09 pm
Forum: Properties of Electrons
Topic: Electromagnetic Spectrum
Replies: 2
Views: 158

Electromagnetic Spectrum

Is it necessary to memorize the chart (1.9) in the book or is it just a reference?
by Jasmine Botello 2F
Mon Oct 16, 2017 6:59 pm
Forum: *Black Body Radiation
Topic: Black body for quiz 2 [ENDORSED]
Replies: 11
Views: 701

Re: Black body for quiz 2 [ENDORSED]

Dr. Lavelle told our lecture that we did not have to worry about black bodies for this upcoming test.
by Jasmine Botello 2F
Thu Oct 12, 2017 8:23 pm
Forum: Properties of Electrons
Topic: Series
Replies: 6
Views: 380

Re: Series

what are the n-levels associated with series that are listed above??
by Jasmine Botello 2F
Thu Oct 12, 2017 8:19 pm
Forum: Properties of Light
Topic: Figure 1.9
Replies: 4
Views: 224

Figure 1.9

So is it necessary to know or memorize this chart in the textbook for future tests?
by Jasmine Botello 2F
Thu Oct 05, 2017 12:12 am
Forum: Balancing Chemical Reactions
Topic: Order of molecules balanced
Replies: 6
Views: 538

Re: Order of molecules balanced

For me, I look at each problem individually and I decide which element looks easiest to balance first and it usually works out. So I would just go on a problem to problem basis.
by Jasmine Botello 2F
Wed Oct 04, 2017 11:56 pm
Forum: Balancing Chemical Reactions
Topic: H7 // Book Problem Clarification
Replies: 4
Views: 191

Re: H7 // Book Problem Clarification

You do not include the catalyst in the equation because its only purpose is to speed up the process of the reaction.

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