Search found 26 matches

by Caitlin Dillon 3G
Sun Mar 12, 2017 7:59 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Geometric isomers as line structures
Replies: 4
Views: 355

Re: Geometric isomers as line structures

Also, remember that Z groups are on zee zame zide!!!
by Caitlin Dillon 3G
Sun Mar 05, 2017 4:58 pm
Forum: *Alkanes
Topic: sec and tert
Replies: 2
Views: 247

sec and tert

Are the prefixes 'sec' and 'tert' only for the butyl substituent? I don't know when to use them
by Caitlin Dillon 3G
Sun Mar 05, 2017 4:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 14722

Re: Quiz 3 Winter 2017

In class, we never discussed "electrophilic aromatic substitution," but it is in section 4.2 of the organic chem textbook. Are we expected to know this for quiz 3 and for the final?
by Caitlin Dillon 3G
Sun Feb 26, 2017 11:38 pm
Forum: *Nucleophiles
Topic: strength of nucleophiles vs basicity
Replies: 2
Views: 217

strength of nucleophiles vs basicity

What is the difference between the trend in how basic something is and how nucleophilic it is?
by Caitlin Dillon 3G
Sun Feb 19, 2017 9:44 pm
Forum: General Rate Laws
Topic: Elementary Rate Laws
Replies: 1
Views: 256

Elementary Rate Laws

Why can you take the coefficient before a molecule and include it in the exponent in the rate law for elementary rxns, but you can't do this for first order or second order rxns?
by Caitlin Dillon 3G
Sun Feb 12, 2017 7:39 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Order of ions in cell diagram
Replies: 1
Views: 188

Order of ions in cell diagram

I know that for cell diagram short notation, you write the anode on the left and the cathode on the right. But, does it matter in which what order you write the ions/elements.
by Caitlin Dillon 3G
Sun Feb 05, 2017 9:11 pm
Forum: Balancing Redox Reactions
Topic: Balancing Redox Reactions: Basic vs Acidic
Replies: 1
Views: 239

Balancing Redox Reactions: Basic vs Acidic

I just started the homework problems for Ch 14. I am really confused. Do we have to know how to balance redox reactions that take place in acidic and basic solutions? If so, do you have any tips?
by Caitlin Dillon 3G
Sun Jan 29, 2017 8:25 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: stability and spontaneity
Replies: 1
Views: 298

stability and spontaneity

can someone please explain why it is more stable if delta G is negative/spontaneous?
by Caitlin Dillon 3G
Sun Jan 29, 2017 2:46 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Quiz 1 Study Group
Replies: 1
Views: 180

Quiz 1 Study Group

Hi. If you live in Hedrick Summit, would you like to meet up and study for our first chem quiz Tuesday night?
by Caitlin Dillon 3G
Fri Jan 20, 2017 6:41 pm
Forum: Phase Changes & Related Calculations
Topic: irreversible vs reversible expansions
Replies: 2
Views: 255

irreversible vs reversible expansions

Can someone please explain the difference between these two? I am having a hard time visualizing it. Irreversible has a constant pressure, and reversible does not? Correct? I also never know what formula to use for work.
by Caitlin Dillon 3G
Sat Jan 14, 2017 1:09 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Measuring Heat Transfer (extensive vs intensive)
Replies: 2
Views: 253

Measuring Heat Transfer (extensive vs intensive)

In lecture on Friday, I was confused about the difference between extensive property and intensive property. Can someone please elaborate?
by Caitlin Dillon 3G
Sat Jan 14, 2017 1:04 pm
Forum: Phase Changes & Related Calculations
Topic: phase changes [ENDORSED]
Replies: 3
Views: 415

Re: phase changes [ENDORSED]

Correct. In order for a solid to go to a liquid, it must absorb heat, so it is endothermic and positive delta H. When a liquid goes to a solid, it must release heat, so it is exothermic and negative delta H.
by Caitlin Dillon 3G
Wed Nov 30, 2016 9:31 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: final yield question
Replies: 2
Views: 319

Re: final yield question

Remember Le Chatelier's Principle which states that chemical reactions adjust so as to minimize the effect of any changes. If you remove ammonia, the chemical reaction will adjust to minimize the effect of that change. Thus, to return back to equilibrium, more ammonia will be produced until the orig...
by Caitlin Dillon 3G
Tue Nov 29, 2016 9:04 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka/Kb question
Replies: 4
Views: 462

Re: Ka/Kb question

Can someone please explain why strong acids and strong bases do not have Ka and Kb values? Is it because they dissociate 100% into products?
by Caitlin Dillon 3G
Tue Nov 29, 2016 8:57 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Identifying a strong acid
Replies: 6
Views: 939

Re: Identifying a strong acid

I was struggling trying to memorize the 7 strong acids we need to memorize! I looked up easy ways to remember them and I found this, it is so helpful! Someone posted: "My chemistry teacher taught us a way to memorize the strong acids. I hope this is helpful: "[I] [Br]ought [Chlorine] into ...
by Caitlin Dillon 3G
Tue Nov 15, 2016 6:20 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number for (en) [ENDORSED]
Replies: 6
Views: 782

Re: Coordination Number for (en) [ENDORSED]

So since en is bidentate? Is dien tridentate because it has 3 nitrogens?
by Caitlin Dillon 3G
Mon Nov 07, 2016 7:30 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Number of Molecular Orbitals
Replies: 2
Views: 329

Re: Number of Molecular Orbitals

Then, after determining whether you're looking at a pi bond or a sigma bond, you assign the hybridization orbital in order to go along with it. For example, if you were looking at the CH(subscript 2)(double bond)CHCHO, The first C would have three regions of electron densities, thus the hybridizatio...
by Caitlin Dillon 3G
Mon Nov 07, 2016 7:18 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Number of Molecular Orbitals
Replies: 2
Views: 329

Re: Number of Molecular Orbitals

The key is to not over think it! In a single bond, there is one sigma bond. In a double bond, there is one sigma and one pi bond. In a triple bond, there is one sigma and two pi bonds.
by Caitlin Dillon 3G
Sun Nov 06, 2016 10:49 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: 4.61 Homework Question
Replies: 3
Views: 364

Re: 4.61 Homework Question

There is a typo in the textbook answer! 22 should be 2 and 11 should be just 1 so don't worry you are doing it correctly. CO: (sigma2s)^2(sigma*2s)^2(pi2p)^4(sigma2p)^2 CO+: (sigma2s)^2(sigma*2s)^2(pi2p)^4(sigma2p)^1 Remember it is in this order because for hetronuclear with z mixed, you use the MO ...
by Caitlin Dillon 3G
Sat Nov 05, 2016 2:44 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Energy Level differences depending on Z
Replies: 1
Views: 273

Re: Energy Level differences depending on Z

the course reader explains this on page 110. Because the nuclear charge is less for atoms z<8, the energy difference between filled s-orbitals and p-orbitals is less. The electron density from filled sigma(2s) and sigma*(2s) orbitals is concentrated along the bond axis. Since the sigma(2Pz) orbitals...
by Caitlin Dillon 3G
Fri Oct 28, 2016 11:41 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Dipole moments
Replies: 1
Views: 290

Re: Dipole moments

This is a little difficult to explain through typing. The definition of a dipole moment can be simplified by the equation: the Greek letter mu= Q(magnitude of the charge) x d (distance between those charges). We most likely won't have to show any math for this. However, we must know how to ANALYZE a...
by Caitlin Dillon 3G
Sat Oct 22, 2016 9:38 pm
Forum: Resonance Structures
Topic: Resonance Structures-More Stable
Replies: 2
Views: 373

Resonance Structures-More Stable

Hi everyone! I understand resonance structures (resonance is a blending of structures with same arrangements of atoms but different arrangements of electrons). However, I am a little confused as to how being able to draw multiple resonance structures for a certain molecule proves that that molecule ...
by Caitlin Dillon 3G
Fri Oct 14, 2016 6:26 pm
Forum: Photoelectric Effect
Topic: Threshold Energy
Replies: 1
Views: 255

Re: Threshold Energy

The signs are always conventional. It's right with or without the sign but it depends on how the question was being asked.
by Caitlin Dillon 3G
Tue Oct 04, 2016 7:35 pm
Forum: Properties of Light
Topic: Speed of light [ENDORSED]
Replies: 3
Views: 442

Speed of light [ENDORSED]

I know this may be a stupid question, but I am really behind in chemistry...Is the speed of light always 3.00 x 10^8 meters per second? Or just in a vacuum?
by Caitlin Dillon 3G
Tue Oct 04, 2016 7:28 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 113
Views: 34829

Re: Rusty on High School Chem [ENDORSED]

I also use a lot of Khan Academy videos! I know little about chem (last time i took it was my sophomore year of high school and it wasn't an AP course), so this class is extremely difficult for me. I am REALLY struggling, but I've been watching Khan Academy videos all day today trying to brush up on...
by Caitlin Dillon 3G
Sat Oct 01, 2016 11:05 am
Forum: Student Social/Study Group
Topic: Sunset Village Study Group
Replies: 17
Views: 1353

Re: Sunset Village Study Group

I live in Hedrick Summit, but i am in desperate need of help! I am down to join

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