Search found 113 matches

by Blake_Katsev_2E
Fri Mar 17, 2017 12:08 pm
Forum: Phase Changes & Related Calculations
Topic: 2017 final
Replies: 1
Views: 288

2017 final

will there be a homework question on this exam?
by Blake_Katsev_2E
Fri Mar 17, 2017 12:05 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 2016 Final
Replies: 3
Views: 479

Re: 2016 Final

i calculated it and i got different results
by Blake_Katsev_2E
Thu Mar 16, 2017 6:54 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: 2016 Final [ENDORSED]
Replies: 1
Views: 277

2016 Final [ENDORSED]

On question 7B, what makes a cyclohexene with two substituents trans or cis? is it because of one being axial and one being equitorial?
by Blake_Katsev_2E
Thu Mar 16, 2017 5:42 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 2016 Final
Replies: 1
Views: 250

2016 Final

For student B in problem four, how would you write the rate law because there are two intermediates? do you need to cancel out the O2's on each side to make it only have one intermediate or is there another method?
by Blake_Katsev_2E
Thu Mar 16, 2017 5:10 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 2016 Final [ENDORSED]
Replies: 1
Views: 404

2016 Final [ENDORSED]

Hi on question 3 C, with the reaction 2Ag+Br2-->2AgBr, why would the cell diagram have AgBr(s) on the anode side? i know that Ag is going to Ag+ but how/why would the bromine attach? Arent they in separate locations? I know that it would be AgBr as a product but do they actually come and fuse togeth...
by Blake_Katsev_2E
Thu Mar 16, 2017 4:42 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 2016 Final
Replies: 3
Views: 479

2016 Final

Why in question 2A when the question says that each of the two reactants have half of the partial pressure as the single product would the K=2x/x^2 rather than K=x/(x/2)^2
by Blake_Katsev_2E
Wed Mar 15, 2017 10:33 pm
Forum: *Cycloalkanes
Topic: 2015 Final 9B
Replies: 1
Views: 463

2015 Final 9B

Is 13456-pentahydroxy-2-hexanone saying the same thing as hexan-2-one-13456-pentol?
by Blake_Katsev_2E
Wed Mar 15, 2017 5:54 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 2015 Final 5A
Replies: 4
Views: 421

2015 Final 5A

How in this question, when using the NERST equation, would you know what to put in the numerator and denominator of ln? Also how would you know that there is only one mole? This question involves the concentration of K ions on the outside and inside of a membrane.
by Blake_Katsev_2E
Tue Mar 14, 2017 4:26 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 2014 Final 1C
Replies: 3
Views: 470

2014 Final 1C

Why would there be 3 sig figs in the answer if the question had 25 degrees C and 47 degrees C?
by Blake_Katsev_2E
Tue Mar 14, 2017 10:25 am
Forum: *Alkanes
Topic: Final 2013
Replies: 4
Views: 635

Re: Final 2013

as in hexadecanol, i dont recall learning how to draw these particular structures.
by Blake_Katsev_2E
Mon Mar 13, 2017 5:37 pm
Forum: *Alkanes
Topic: Final 2013
Replies: 4
Views: 635

Final 2013

Do we need to know how to do question 6B/how do we do it?
by Blake_Katsev_2E
Mon Mar 13, 2017 5:09 pm
Forum: General Rate Laws
Topic: 2013 Final
Replies: 1
Views: 227

2013 Final

on question 4C, how does the rate become positive? Also in part B of it do you assume that Q is equal to 1/[02] because it is the only aqueous molecule?
by Blake_Katsev_2E
Fri Mar 10, 2017 3:16 pm
Forum: *Alkanes
Topic: Nomenclature
Replies: 3
Views: 336

Nomenclature

Do we need to know common names because some problems assigned ask us for the common and the IUPAC but we havnt really gone over how to use common names with functional groups and common names just in general. Also what is the functional group name of a double and triple bond?
by Blake_Katsev_2E
Fri Mar 10, 2017 2:49 pm
Forum: *Alcohols
Topic: 2.40
Replies: 1
Views: 236

2.40

Why on question 2.40 would it be 2-methylbut-3-yn-2-ol rather than making it a 3 carbon chain with two methyls to lower all the numbers by one? like making it 1,1-dimethylprop-2-yn-1-ol.
by Blake_Katsev_2E
Tue Mar 07, 2017 11:04 pm
Forum: *Nucleophiles
Topic: Ambident
Replies: 2
Views: 508

Ambident

What is an ambident nucleophile?
by Blake_Katsev_2E
Tue Mar 07, 2017 10:59 pm
Forum: *Nucleophiles
Topic: NO2+
Replies: 1
Views: 445

NO2+

Why would this be an electrophile? it has a double bond around the N right? so that means a lot of electron density
by Blake_Katsev_2E
Tue Mar 07, 2017 10:43 pm
Forum: *Cycloalkenes
Topic: Cyclopentane Naming
Replies: 4
Views: 484

Cyclopentane Naming

In question 1.16 there is a pentane ring with a isopropyl and dimethyl substituent. Shouldn't the isopropyl be 1 and dimethyl be on Carbon two? They are both either 1 or 2 so i thought you would go alphabetically
by Blake_Katsev_2E
Mon Mar 06, 2017 6:07 pm
Forum: *Nucleophiles
Topic: Determining nucleophile vs. Electrophile
Replies: 1
Views: 546

Determining nucleophile vs. Electrophile

At the end of class today professor Lavelle described how (CH3)2O is a nucleophile due to the oxygens lone pairs. But for CH3O, the carbon is now an electrophile because the C now gets the full pull of Oxygens pulling power. So C is an electrophile but wouldn't that make O a nucleophile? I am confus...
by Blake_Katsev_2E
Sat Mar 04, 2017 6:49 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Isomers [ENDORSED]
Replies: 1
Views: 257

Isomers [ENDORSED]

What is the difference between a constitutional isomer and a geometric isomer? What are some examples of each?
by Blake_Katsev_2E
Sat Mar 04, 2017 6:05 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 15854

Re: Quiz 3 Winter 2017

Shouldnt number 4 be 5-butyl instead of 4-butyl?
by Blake_Katsev_2E
Fri Mar 03, 2017 9:22 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: questions 1.25-1.29
Replies: 2
Views: 279

questions 1.25-1.29

Are we supposed to already know how to do cis, Z and trans, E organic structures? Because these problems are assigned but were never gone over in class.
by Blake_Katsev_2E
Fri Mar 03, 2017 8:48 pm
Forum: *Cycloalkenes
Topic: 1.16
Replies: 1
Views: 227

1.16

Hi two part question. Is the numbering of the carbon atoms in this question arbitrary? So could the isopropyl also be 1-isopropyl and the methyls both be on the second carbon or does it have to be isopropyl 1 and dimethyl two? And when ordering the name would you go alphabetically by propyl or does ...
by Blake_Katsev_2E
Mon Feb 27, 2017 4:00 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: 4.40
Replies: 1
Views: 205

4.40

part m. How do you determine if something is kinetically controlled or thermodynamically controlled? It seems like the reactions with the higher activation energies are kinetically controlled but it seems it should be the opposite because it should be harder for the process to happen
by Blake_Katsev_2E
Sun Feb 26, 2017 3:53 pm
Forum: *Electrophilic Addition
Topic: 4.30
Replies: 1
Views: 219

4.30

it says that the activation energy is 125 kj/mol, how do you know if it will occur at room temperature?
by Blake_Katsev_2E
Wed Feb 22, 2017 9:24 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation energy
Replies: 3
Views: 293

Re: Activation energy

so would that mean when the energy of products is less, raising the temperature would always lower K?
by Blake_Katsev_2E
Wed Feb 22, 2017 5:58 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.79
Replies: 2
Views: 273

15.79

Im sorry but part b to this question just makes no sense, can somebody explain it in other words? thanks
by Blake_Katsev_2E
Wed Feb 22, 2017 5:57 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: catalysts
Replies: 1
Views: 256

catalysts

Don't catalysts increase both k and k'? So why would we use them if they are both increased because it seems like that wouldn't change anything. Like in step d of 15.74, wouldn't the catalysts be chosen to shift the equilibrium towards the products?
by Blake_Katsev_2E
Wed Feb 22, 2017 5:54 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.89
Replies: 1
Views: 229

15.89

If given these three steps, how do you know wht the activation energies of each will be and if the overall is exothermic when graphing the process?
by Blake_Katsev_2E
Wed Feb 22, 2017 5:32 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.69
Replies: 1
Views: 201

15.69

can somebody explain the math behind 15.69
by Blake_Katsev_2E
Wed Feb 22, 2017 5:03 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.61
Replies: 3
Views: 375

15.61

Why in the solutions manual do they do (T'-T/T'*T) for the arrhenius equation?
by Blake_Katsev_2E
Wed Feb 22, 2017 5:02 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation energy
Replies: 3
Views: 293

Activation energy

why would raising temperature affect k more rather than k' if the activation energy of k is higher?
by Blake_Katsev_2E
Tue Feb 21, 2017 9:46 pm
Forum: Zero Order Reactions
Topic: 15.99
Replies: 2
Views: 418

15.99

Could somebody explain why graphing the half life vs. concentration of a zero order reaction is linear but not if its second order?
by Blake_Katsev_2E
Tue Feb 21, 2017 6:06 pm
Forum: General Rate Laws
Topic: steady state method
Replies: 1
Views: 296

steady state method

Will we need to know this for the quiz?
by Blake_Katsev_2E
Tue Feb 21, 2017 5:21 pm
Forum: General Rate Laws
Topic: rate laws
Replies: 2
Views: 297

rate laws

How would we determine the rate law if the first step is slow but there is an intermediate as a reactant? As in if a reactant is later formed so that they would cancel out?
by Blake_Katsev_2E
Fri Feb 17, 2017 9:31 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.101
Replies: 1
Views: 200

15.101

How would water be put in the rate law? Because wouldn't the concentration only be one at all times? What should we include in rate laws? Only gasses and aqueos solutions or what?
by Blake_Katsev_2E
Fri Feb 17, 2017 9:17 pm
Forum: Zero Order Reactions
Topic: 15.99
Replies: 1
Views: 206

15.99

For this question in the textbook could somebody please give a detailed answer because the solutions manual doesn't have that. Like what does it mean to graph the half life vs. [A]?
by Blake_Katsev_2E
Tue Feb 14, 2017 10:52 am
Forum: Calculating Work of Expansion
Topic: 9.47
Replies: 2
Views: 388

9.47

9.47 Initially a sample of ideal gas at 323 K occupies 1.67 L at 4.95 atm. The gas is allowed to expand to 7.33 L by two pathways: (a) isothermal, reversible expansion; (b) isothermal, irreversible free expansion. Calculate "Stot, "S, and "Ssurr for each pathway. I understand when cal...
by Blake_Katsev_2E
Tue Feb 14, 2017 9:49 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 18.91
Replies: 1
Views: 209

18.91

A voltaic cell functions only when the electrical circuit is complete. In the external circuit the current is carried by the f ow of electrons through a metal wire. Explain how the current is carried through the cell itself. the answer is a negativley charged electrolyte goes from cathode to anode, ...
by Blake_Katsev_2E
Tue Feb 14, 2017 9:44 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.85
Replies: 1
Views: 188

14.85

How would Volta have ordered the following metals, if he put the most
strongly reducing metal f rst: Fe, Ag, Au, Zn, Cu, Ni, Co, Al?

Why would they be ordered from lowest to highest reduction potentials? Shouldnt a higher potential mean stronger reducing power of the metal?
by Blake_Katsev_2E
Tue Feb 14, 2017 9:34 am
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: Quiz one answer
Replies: 1
Views: 281

Quiz one answer

Does anybody know what the right answer was to the question about two crystals at 0K? it said that there was one crystal of CO and N2, and asked which would have a higher entropy.
by Blake_Katsev_2E
Tue Feb 14, 2017 9:32 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: E and Enot
Replies: 1
Views: 362

E and Enot

Why in question 14.83 does the answer say that they are both temperature dependent? isn't E not only valid at one temperature?
by Blake_Katsev_2E
Mon Feb 13, 2017 4:57 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 2014 Midterm
Replies: 5
Views: 564

Re: 2014 Midterm

Thank you that helped out a lot. But still a little confused on the square root part^
by Blake_Katsev_2E
Sun Feb 12, 2017 9:59 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 2015 midterm [ENDORSED]
Replies: 1
Views: 355

2015 midterm [ENDORSED]

in question 6 there is double rounding which changes the final answer, so what should we do in this instance and what will be get points for doing? @lavelledoggydog
by Blake_Katsev_2E
Sun Feb 12, 2017 9:38 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 2015 midterm
Replies: 1
Views: 199

2015 midterm

Why on question 4 part D why would you need to find the entropy change of water going to the boiling point and entropy change of the phase change, AND the entropy change of going back to the original temperature? i dont understand what is going on conceptually here.
by Blake_Katsev_2E
Sun Feb 12, 2017 9:22 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 2015 midterm
Replies: 1
Views: 221

2015 midterm

Why on question 5.b would the Cv be used rather than Cp because the balloon is expanding?
by Blake_Katsev_2E
Sun Feb 12, 2017 5:39 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 2014 Midterm
Replies: 5
Views: 564

2014 Midterm

Why in question 8 would the first rxn be oxidized? dont you want a positive cell potential? and also how do you get from K to Ka and what does Ka mean in this context?
by Blake_Katsev_2E
Sun Feb 12, 2017 4:58 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Winter 2014 midterm
Replies: 1
Views: 197

Winter 2014 midterm

why on question 5c would E be considered a path function?
by Blake_Katsev_2E
Sun Feb 12, 2017 4:55 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 2013 Winter Midterm
Replies: 2
Views: 247

2013 Winter Midterm

Why in question 7 are they using (0.05916/n)*logQ rather than (0.02569/n)*lnQ?
by Blake_Katsev_2E
Sun Feb 12, 2017 2:14 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: Winter 2013 Midterm
Replies: 1
Views: 291

Winter 2013 Midterm

Why in question 5B would the entropy only be decided by the size of the molecules? Shouldnt there be more entropy if it has more possible arrangements?
by Blake_Katsev_2E
Sat Feb 11, 2017 3:32 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Winter 2013 Midterm
Replies: 1
Views: 199

Winter 2013 Midterm

Why on question 1a would you need to break two O-H bonds rather than the one that is connected to the oxygen that leaves the molecule? so would would you break and reform it? i understand if its a double bond that you need to break both then reform one but im not sure about this case.
by Blake_Katsev_2E
Sat Feb 11, 2017 12:17 pm
Forum: Second Order Reactions
Topic: Half lives [ENDORSED]
Replies: 1
Views: 240

Half lives [ENDORSED]

Why in question 15.35 would you not be able to multiply the half live time by 4 to see how long it takes to get to one 16th its original concentration?
by Blake_Katsev_2E
Wed Feb 08, 2017 12:13 pm
Forum: Phase Changes & Related Calculations
Topic: Phase changes
Replies: 1
Views: 320

Phase changes

When going from a gas to a liquid is deltaH positive or negative and why?
by Blake_Katsev_2E
Sat Feb 04, 2017 6:14 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: E and Enot
Replies: 1
Views: 203

E and Enot

Why would Enot be temperature dependent? I thought it would always be at 25 C. It says it is for 14.83
by Blake_Katsev_2E
Sat Feb 04, 2017 6:03 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Electrolysis
Replies: 1
Views: 267

Electrolysis

Why in 14.57 would water have an Enot value of 0.42? thats not in the back of the book
by Blake_Katsev_2E
Sat Feb 04, 2017 5:47 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: setting up electrolysis
Replies: 1
Views: 311

setting up electrolysis

Why in question 14.55 would the SO4 not oxidize and use the electrolysis of water instead?
by Blake_Katsev_2E
Thu Feb 02, 2017 6:20 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Platnium [ENDORSED]
Replies: 1
Views: 212

Platnium [ENDORSED]

When do you need to add platnium to the cell diagram? if its a gas? if its a liquid? if its a noncunducting metal? which elements do you not need it for?
by Blake_Katsev_2E
Wed Feb 01, 2017 9:35 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell diagrams
Replies: 1
Views: 163

Cell diagrams

why on 14.15 would the cell diagram be labeled as it is? Why would Ag be on both sides and why would AgBr be on the reduction part?
by Blake_Katsev_2E
Sat Jan 28, 2017 6:40 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs free and Standard Gibbs free
Replies: 1
Views: 254

Gibbs free and Standard Gibbs free

What is the differences between Gibbs free energy and standard gibbs free energy and when do you use each?
by Blake_Katsev_2E
Fri Jan 27, 2017 3:29 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: sig figs
Replies: 1
Views: 230

sig figs

Why when calculating K, is there only one sig fig?
by Blake_Katsev_2E
Thu Jan 26, 2017 5:55 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs free energy
Replies: 1
Views: 277

Gibbs free energy

can we always use the two ways of calculating delta G or are there limitations to using them?
by Blake_Katsev_2E
Thu Jan 26, 2017 5:54 pm
Forum: Calculating Work of Expansion
Topic: 8.117
Replies: 2
Views: 216

Re: 8.117

so i would find the change in moles and use delta n*R*T for work to add to enthalpy
by Blake_Katsev_2E
Tue Jan 24, 2017 11:31 pm
Forum: Calculating Work of Expansion
Topic: non isothermal processes
Replies: 2
Views: 337

non isothermal processes

What would happen in a process that is irreversable and reversible but not isothermal? or do we not need to know that?
by Blake_Katsev_2E
Tue Jan 24, 2017 6:32 pm
Forum: Calculating Work of Expansion
Topic: 8.117
Replies: 2
Views: 216

8.117

Why in this problem would there be a net production of 2/3 mole of gas?
by Blake_Katsev_2E
Mon Jan 23, 2017 5:15 pm
Forum: Calculating Work of Expansion
Topic: Irreversible process
Replies: 2
Views: 340

Irreversible process

Why is there no work done in free expansion? and does free expansion mean irreversible?
by Blake_Katsev_2E
Thu Jan 19, 2017 12:43 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: 101 J/L*atm
Replies: 1
Views: 1028

101 J/L*atm

How is this conversion factor acquired?
by Blake_Katsev_2E
Thu Jan 19, 2017 12:42 pm
Forum: Calculating Work of Expansion
Topic: isothermal processes [ENDORSED]
Replies: 1
Views: 237

isothermal processes [ENDORSED]

is the equation for work done in an isothermal process w=-nRT(V2/V1) or -nRTln(V2/V1)
by Blake_Katsev_2E
Mon Jan 16, 2017 1:24 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hc and Hf
Replies: 3
Views: 370

Hc and Hf

When would you use Hc and when would you use Hf?
by Blake_Katsev_2E
Mon Jan 16, 2017 12:26 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law
Replies: 3
Views: 379

Hess's Law

How do you know when to flip an equation or halve or double it?
by Blake_Katsev_2E
Mon Jan 16, 2017 12:24 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.65
Replies: 1
Views: 186

8.65

Why in this question in the textbook is the second equation halved?
by Blake_Katsev_2E
Sat Dec 03, 2016 9:25 pm
Forum: *Titrations & Titration Calculations
Topic: Titrations
Replies: 1
Views: 525

Titrations

When a weak acid or base is being titrated but not all of the original amount of moles is not used up so there is extra. How do you know when to have it act as its conjugate base or acid because there is some of its concentration as a reactant (base) as well as product (conjugate acid).
by Blake_Katsev_2E
Fri Dec 02, 2016 10:49 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: 13.87 [ENDORSED]
Replies: 1
Views: 569

13.87 [ENDORSED]

why when adding HCl does acid concentration go up AND base concentration go down?
by Blake_Katsev_2E
Fri Dec 02, 2016 1:10 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: D orbital
Replies: 3
Views: 431

Re: D orbital

will a d orbital electron ever be ejected before an S orbital one?
by Blake_Katsev_2E
Thu Dec 01, 2016 1:07 am
Forum: Lewis Acids & Bases
Topic: Final 2013 7 B
Replies: 1
Views: 318

Final 2013 7 B

Why would the 3 H's have more electron pulling power than 3 CH3s?
by Blake_Katsev_2E
Thu Dec 01, 2016 12:40 am
Forum: Naming
Topic: 2013 Final 5 B
Replies: 1
Views: 282

2013 Final 5 B

Shouldnt Cl2 come before NH3 because c comes before N in the alphabet?
by Blake_Katsev_2E
Thu Dec 01, 2016 12:33 am
Forum: Octet Exceptions
Topic: 2013 Final 4 C
Replies: 1
Views: 397

2013 Final 4 C

Why would IF5 be polar? is it because of the electrons on the central atom?
by Blake_Katsev_2E
Thu Dec 01, 2016 12:15 am
Forum: Ionic & Covalent Bonds
Topic: 2013 final 3.C
Replies: 2
Views: 310

2013 final 3.C

why would AgF be more ionic than Be(Cl)2?
by Blake_Katsev_2E
Wed Nov 30, 2016 11:35 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: D orbital
Replies: 3
Views: 431

D orbital

will a D orbital e- of n-1 ever be removed before a Sn?
by Blake_Katsev_2E
Wed Nov 30, 2016 11:33 pm
Forum: Ionic & Covalent Bonds
Topic: Polarizability
Replies: 2
Views: 307

Polarizability

So a small positively charged cation has strong polarizing power, what makes an anion polarizable?
by Blake_Katsev_2E
Wed Nov 30, 2016 11:32 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Final 2012
Replies: 1
Views: 229

Final 2012

why in question 8 is there only 3 sig figs?
by Blake_Katsev_2E
Tue Nov 29, 2016 1:46 pm
Forum: Conjugate Acids & Bases
Topic: Strong Bases
Replies: 1
Views: 320

Strong Bases

Why is Mg(OH)2 and Be(OH)2 not strong bases? the heavier alkaline ones are though.
by Blake_Katsev_2E
Tue Nov 29, 2016 11:30 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Hybridization
Replies: 1
Views: 244

Hybridization

How does the molecular orbital theory relate to hybridization? because shouldn't there be hybridization if to molecules are bonding? Also what purpose does the MOB serve? To show all of the electron bonds?
by Blake_Katsev_2E
Mon Nov 28, 2016 6:29 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: 13.11
Replies: 1
Views: 287

13.11

Why would adding NaOH to the reaction : CH3COOH + H2O --> CH3CO2- + H3O+ create more CH3CO2- and decrease the amount of CH3COOH?
by Blake_Katsev_2E
Thu Nov 24, 2016 9:25 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: hw 12.117
Replies: 1
Views: 242

hw 12.117

Why when writing K do you use (Kb x Ka)/Kw?
by Blake_Katsev_2E
Tue Nov 22, 2016 1:06 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: question 12.63
Replies: 2
Views: 276

question 12.63

why when finding the Ka would the denominator be (1-.024) x .110 rather than being .11-.00264 which the ice box indicates that it should be.
by Blake_Katsev_2E
Sun Nov 20, 2016 3:35 pm
Forum: Bronsted Acids & Bases
Topic: question 12.43
Replies: 1
Views: 260

question 12.43

why would 2,4,6 trichlorophenol be a stronger acid than phenol? is it because the chlorine atoms are very electronegative and thus is better with a negative sign so it can lose a proton easily?
by Blake_Katsev_2E
Wed Nov 16, 2016 5:15 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted acid and bases
Replies: 1
Views: 289

Bronsted acid and bases

why would CH3COOH + NH3 --> CH3CONH2 +H20 not be considered a bronsted base with no proton transfer?
by Blake_Katsev_2E
Mon Nov 14, 2016 6:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Gases
Replies: 1
Views: 273

Gases

When dealing with gasses and writing out an expression for a constant or Q, when do you use a P in the front and when do you just use brakets?
by Blake_Katsev_2E
Sun Nov 13, 2016 10:10 pm
Forum: Naming
Topic: Quiz 3 prep
Replies: 3
Views: 319

Re: Quiz 3 prep

sorry i mean when you write it out as a formula
by Blake_Katsev_2E
Sun Nov 13, 2016 10:09 pm
Forum: Naming
Topic: Quiz 3 Prep
Replies: 1
Views: 246

Quiz 3 Prep

Why in triammineaquaplatinum(IV) chloride is the aqua written as H20 rather than OH2? it is listed after ammine acting like the O should come first because O is after N in the alphabet but H is before...
by Blake_Katsev_2E
Sun Nov 13, 2016 9:56 pm
Forum: Naming
Topic: Quiz 3 prep
Replies: 3
Views: 319

Quiz 3 prep

Why would in pentaamiminechloronickel(III) chloride the ammine be placed before the chloride? I thought that they are listed in alphabetical order and C comes before N.
by Blake_Katsev_2E
Fri Nov 11, 2016 11:12 am
Forum: Naming
Topic: naming [ENDORSED]
Replies: 2
Views: 325

naming [ENDORSED]

When do you use bis and tris rather than bi and tri?
by Blake_Katsev_2E
Thu Nov 03, 2016 9:09 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: HF Diagram
Replies: 1
Views: 208

HF Diagram

Why would the 2sigmaP come before the 2piP? if hydrogen has less protons than Oxygen, should the Pi orbital come first? Also how would you draw the bonding and antibonding orbitals for such case?
by Blake_Katsev_2E
Wed Nov 02, 2016 1:03 pm
Forum: Lewis Structures
Topic: Octet rule
Replies: 7
Views: 544

Octet rule

When the question says follow the octet rule does that mean that the central atom has to have 8 e- or can it have an expanded octet?
by Blake_Katsev_2E
Tue Nov 01, 2016 5:46 pm
Forum: Hybridization
Topic: hybridization
Replies: 2
Views: 312

hybridization

Which P orbitals form with s to create SP first? Also which P's create Pi bonds? is it Pz's?
by Blake_Katsev_2E
Sun Oct 30, 2016 3:02 pm
Forum: Hybridization
Topic: Lone pairs [ENDORSED]
Replies: 1
Views: 228

Lone pairs [ENDORSED]

Do lone pairs affect hybridization? like for example, a central with three bonds and a lone pair would be sp2 or sp3?
by Blake_Katsev_2E
Fri Oct 28, 2016 9:52 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Midterm
Replies: 9
Views: 689

Midterm

Anybody know what the material goes up to for the midterm?
by Blake_Katsev_2E
Fri Oct 28, 2016 7:29 pm
Forum: Hybridization
Topic: 25.d
Replies: 2
Views: 299

25.d

Hello, why would this molecule in problem 25.d be polar?
by Blake_Katsev_2E
Thu Oct 27, 2016 12:49 pm
Forum: Hybridization
Topic: VESPR
Replies: 2
Views: 356

VESPR

Why would ClO2 + be trigonal pyramidal and not bent?

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