Search found 113 matches
- Fri Mar 17, 2017 12:08 pm
- Forum: Phase Changes & Related Calculations
- Topic: 2017 final
- Replies: 1
- Views: 539
2017 final
will there be a homework question on this exam?
- Fri Mar 17, 2017 12:05 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: 2016 Final
- Replies: 3
- Views: 892
Re: 2016 Final
i calculated it and i got different results
- Thu Mar 16, 2017 6:54 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: 2016 Final [ENDORSED]
- Replies: 1
- Views: 565
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?
- Thu Mar 16, 2017 5:42 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: 2016 Final
- Replies: 1
- Views: 493
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?
- Thu Mar 16, 2017 5:10 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 2016 Final [ENDORSED]
- Replies: 1
- Views: 4268
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...
- Thu Mar 16, 2017 4:42 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: 2016 Final
- Replies: 3
- Views: 892
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
- Wed Mar 15, 2017 10:33 pm
- Forum: *Cycloalkanes
- Topic: 2015 Final 9B
- Replies: 1
- Views: 1277
2015 Final 9B
Is 13456-pentahydroxy-2-hexanone saying the same thing as hexan-2-one-13456-pentol?
- Wed Mar 15, 2017 10:30 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: 865
Re: 2015 Final 5A
thanks!
- 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: 865
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.
- Tue Mar 14, 2017 4:26 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 2014 Final 1C
- Replies: 3
- Views: 857
2014 Final 1C
Why would there be 3 sig figs in the answer if the question had 25 degrees C and 47 degrees C?
- Tue Mar 14, 2017 10:25 am
- Forum: *Alkanes
- Topic: Final 2013
- Replies: 4
- Views: 1692
Re: Final 2013
as in hexadecanol, i dont recall learning how to draw these particular structures.
- Mon Mar 13, 2017 5:37 pm
- Forum: *Alkanes
- Topic: Final 2013
- Replies: 4
- Views: 1692
Final 2013
Do we need to know how to do question 6B/how do we do it?
- Mon Mar 13, 2017 5:09 pm
- Forum: General Rate Laws
- Topic: 2013 Final
- Replies: 1
- Views: 430
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?
- Fri Mar 10, 2017 3:16 pm
- Forum: *Alkanes
- Topic: Nomenclature
- Replies: 3
- Views: 715
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?
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.
- Tue Mar 07, 2017 11:04 pm
- Forum: *Nucleophiles
- Topic: Ambident
- Replies: 3
- Views: 1447
Ambident
What is an ambident nucleophile?
- Tue Mar 07, 2017 10:59 pm
- Forum: *Nucleophiles
- Topic: NO2+
- Replies: 1
- Views: 1291
NO2+
Why would this be an electrophile? it has a double bond around the N right? so that means a lot of electron density
- Tue Mar 07, 2017 10:43 pm
- Forum: *Cycloalkenes
- Topic: Cyclopentane Naming
- Replies: 4
- Views: 1012
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
- Mon Mar 06, 2017 6:07 pm
- Forum: *Nucleophiles
- Topic: Determining nucleophile vs. Electrophile
- Replies: 1
- Views: 1708
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...
- Sat Mar 04, 2017 6:49 pm
- Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
- Topic: Isomers [ENDORSED]
- Replies: 1
- Views: 581
Isomers [ENDORSED]
What is the difference between a constitutional isomer and a geometric isomer? What are some examples of each?
- Sat Mar 04, 2017 6:05 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 30089
Re: Quiz 3 Winter 2017
Shouldnt number 4 be 5-butyl instead of 4-butyl?
- 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: 603
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.
- Fri Mar 03, 2017 8:48 pm
- Forum: *Cycloalkenes
- Topic: 1.16
- Replies: 1
- Views: 450
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 ...
- Mon Feb 27, 2017 4:00 pm
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: 4.40
- Replies: 1
- Views: 527
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
- Sun Feb 26, 2017 3:53 pm
- Forum: *Electrophilic Addition
- Topic: 4.30
- Replies: 1
- Views: 391
4.30
it says that the activation energy is 125 kj/mol, how do you know if it will occur at room temperature?
- Wed Feb 22, 2017 9:24 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Activation energy
- Replies: 3
- Views: 640
Re: Activation energy
so would that mean when the energy of products is less, raising the temperature would always lower K?
- Wed Feb 22, 2017 5:58 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 15.79
- Replies: 2
- Views: 572
15.79
Im sorry but part b to this question just makes no sense, can somebody explain it in other words? thanks
- Wed Feb 22, 2017 5:57 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: catalysts
- Replies: 1
- Views: 465
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?
- Wed Feb 22, 2017 5:54 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 15.89
- Replies: 1
- Views: 495
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?
- Wed Feb 22, 2017 5:32 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 15.69
- Replies: 1
- Views: 343
15.69
can somebody explain the math behind 15.69
- Wed Feb 22, 2017 5:03 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 15.61
- Replies: 3
- Views: 758
15.61
Why in the solutions manual do they do (T'-T/T'*T) for the arrhenius equation?
- Wed Feb 22, 2017 5:02 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Activation energy
- Replies: 3
- Views: 640
Activation energy
why would raising temperature affect k more rather than k' if the activation energy of k is higher?
- Tue Feb 21, 2017 9:46 pm
- Forum: Zero Order Reactions
- Topic: 15.99
- Replies: 2
- Views: 772
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?
- Tue Feb 21, 2017 6:06 pm
- Forum: General Rate Laws
- Topic: steady state method
- Replies: 1
- Views: 548
steady state method
Will we need to know this for the quiz?
- Tue Feb 21, 2017 5:21 pm
- Forum: General Rate Laws
- Topic: rate laws
- Replies: 2
- Views: 582
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?
- Fri Feb 17, 2017 9:31 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: 15.101
- Replies: 1
- Views: 407
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?
- Fri Feb 17, 2017 9:17 pm
- Forum: Zero Order Reactions
- Topic: 15.99
- Replies: 1
- Views: 343
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]?
- Tue Feb 14, 2017 10:52 am
- Forum: Calculating Work of Expansion
- Topic: 9.47
- Replies: 2
- Views: 800
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...
- Tue Feb 14, 2017 9:49 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 18.91
- Replies: 1
- Views: 329
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, ...
- Tue Feb 14, 2017 9:44 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.85
- Replies: 1
- Views: 400
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?
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?
- 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: 525
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.
- 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: 773
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?
- Mon Feb 13, 2017 4:57 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: 2014 Midterm
- Replies: 5
- Views: 1132
Re: 2014 Midterm
Thank you that helped out a lot. But still a little confused on the square root part^
- Sun Feb 12, 2017 9:59 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: 2015 midterm [ENDORSED]
- Replies: 1
- Views: 606
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
- Sun Feb 12, 2017 9:38 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: 2015 midterm
- Replies: 1
- Views: 310
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.
- Sun Feb 12, 2017 9:22 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: 2015 midterm
- Replies: 1
- Views: 448
2015 midterm
Why on question 5.b would the Cv be used rather than Cp because the balloon is expanding?
- Sun Feb 12, 2017 6:46 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: 447
Re: 2013 Winter Midterm
No they arent very close together...
- Sun Feb 12, 2017 5:39 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: 2014 Midterm
- Replies: 5
- Views: 1132
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?
- 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: 289
Winter 2014 midterm
why on question 5c would E be considered a path function?
- 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: 447
2013 Winter Midterm
Why in question 7 are they using (0.05916/n)*logQ rather than (0.02569/n)*lnQ?
- 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: 475
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?
- 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: 399
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.
- Sat Feb 11, 2017 12:17 pm
- Forum: Second Order Reactions
- Topic: Half lives [ENDORSED]
- Replies: 1
- Views: 356
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?
- Wed Feb 08, 2017 12:13 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase changes
- Replies: 1
- Views: 624
Phase changes
When going from a gas to a liquid is deltaH positive or negative and why?
- Sat Feb 04, 2017 6:14 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: E and Enot
- Replies: 1
- Views: 354
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
- 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: 478
Electrolysis
Why in 14.57 would water have an Enot value of 0.42? thats not in the back of the book
- 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: 494
setting up electrolysis
Why in question 14.55 would the SO4 not oxidize and use the electrolysis of water instead?
- Thu Feb 02, 2017 6:20 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Platnium [ENDORSED]
- Replies: 1
- Views: 415
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?
- Wed Feb 01, 2017 9:35 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell diagrams
- Replies: 1
- Views: 302
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?
- Sat Jan 28, 2017 6:40 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs free and Standard Gibbs free
- Replies: 1
- Views: 496
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?
- Fri Jan 27, 2017 3:29 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: sig figs
- Replies: 1
- Views: 459
sig figs
Why when calculating K, is there only one sig fig?
- Thu Jan 26, 2017 5:55 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs free energy
- Replies: 1
- Views: 522
Gibbs free energy
can we always use the two ways of calculating delta G or are there limitations to using them?
- Thu Jan 26, 2017 5:54 pm
- Forum: Calculating Work of Expansion
- Topic: 8.117
- Replies: 2
- Views: 386
Re: 8.117
so i would find the change in moles and use delta n*R*T for work to add to enthalpy
- Tue Jan 24, 2017 11:31 pm
- Forum: Calculating Work of Expansion
- Topic: non isothermal processes
- Replies: 2
- Views: 567
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?
- Tue Jan 24, 2017 6:32 pm
- Forum: Calculating Work of Expansion
- Topic: 8.117
- Replies: 2
- Views: 386
8.117
Why in this problem would there be a net production of 2/3 mole of gas?
- Mon Jan 23, 2017 5:15 pm
- Forum: Calculating Work of Expansion
- Topic: Irreversible process
- Replies: 2
- Views: 645
Irreversible process
Why is there no work done in free expansion? and does free expansion mean irreversible?
- Thu Jan 19, 2017 12:43 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: 101 J/L*atm
- Replies: 1
- Views: 2198
101 J/L*atm
How is this conversion factor acquired?
- Thu Jan 19, 2017 12:42 pm
- Forum: Calculating Work of Expansion
- Topic: isothermal processes [ENDORSED]
- Replies: 1
- Views: 495
isothermal processes [ENDORSED]
is the equation for work done in an isothermal process w=-nRT(V2/V1) or -nRTln(V2/V1)
- 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: 1643
Hc and Hf
When would you use Hc and when would you use Hf?
- 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: 2
- Views: 828
Hess's Law
How do you know when to flip an equation or halve or double it?
- 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: 439
8.65
Why in this question in the textbook is the second equation halved?
- Sat Dec 03, 2016 9:25 pm
- Forum: *Titrations & Titration Calculations
- Topic: Titrations
- Replies: 1
- Views: 899
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).
- Fri Dec 02, 2016 10:49 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: 13.87 [ENDORSED]
- Replies: 1
- Views: 902
13.87 [ENDORSED]
why when adding HCl does acid concentration go up AND base concentration go down?
- Fri Dec 02, 2016 1:10 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: D orbital
- Replies: 3
- Views: 739
Re: D orbital
will a d orbital electron ever be ejected before an S orbital one?
- Thu Dec 01, 2016 1:07 am
- Forum: Lewis Acids & Bases
- Topic: Final 2013 7 B
- Replies: 1
- Views: 483
Final 2013 7 B
Why would the 3 H's have more electron pulling power than 3 CH3s?
- Thu Dec 01, 2016 12:40 am
- Forum: Naming
- Topic: 2013 Final 5 B
- Replies: 1
- Views: 486
2013 Final 5 B
Shouldnt Cl2 come before NH3 because c comes before N in the alphabet?
- Thu Dec 01, 2016 12:33 am
- Forum: Octet Exceptions
- Topic: 2013 Final 4 C
- Replies: 1
- Views: 689
2013 Final 4 C
Why would IF5 be polar? is it because of the electrons on the central atom?
- Thu Dec 01, 2016 12:15 am
- Forum: Ionic & Covalent Bonds
- Topic: 2013 final 3.C
- Replies: 2
- Views: 576
2013 final 3.C
why would AgF be more ionic than Be(Cl)2?
- Wed Nov 30, 2016 11:35 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: D orbital
- Replies: 3
- Views: 739
D orbital
will a D orbital e- of n-1 ever be removed before a Sn?
- Wed Nov 30, 2016 11:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polarizability
- Replies: 2
- Views: 570
Polarizability
So a small positively charged cation has strong polarizing power, what makes an anion polarizable?
- Wed Nov 30, 2016 11:32 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Final 2012
- Replies: 1
- Views: 482
Final 2012
why in question 8 is there only 3 sig figs?
- Tue Nov 29, 2016 1:46 pm
- Forum: Conjugate Acids & Bases
- Topic: Strong Bases
- Replies: 1
- Views: 556
Strong Bases
Why is Mg(OH)2 and Be(OH)2 not strong bases? the heavier alkaline ones are though.
- Tue Nov 29, 2016 11:30 am
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Hybridization
- Replies: 1
- Views: 484
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?
- Mon Nov 28, 2016 6:29 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: 13.11
- Replies: 1
- Views: 505
13.11
Why would adding NaOH to the reaction : CH3COOH + H2O --> CH3CO2- + H3O+ create more CH3CO2- and decrease the amount of CH3COOH?
- Thu Nov 24, 2016 9:25 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: hw 12.117
- Replies: 1
- Views: 451
hw 12.117
Why when writing K do you use (Kb x Ka)/Kw?
- Tue Nov 22, 2016 1:06 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: question 12.63
- Replies: 2
- Views: 540
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.
- Sun Nov 20, 2016 3:35 pm
- Forum: Bronsted Acids & Bases
- Topic: question 12.43
- Replies: 1
- Views: 515
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?
- Wed Nov 16, 2016 5:15 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted acid and bases
- Replies: 1
- Views: 497
Bronsted acid and bases
why would CH3COOH + NH3 --> CH3CONH2 +H20 not be considered a bronsted base with no proton transfer?
- Mon Nov 14, 2016 6:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Gases
- Replies: 1
- Views: 360
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?
- Sun Nov 13, 2016 10:10 pm
- Forum: Naming
- Topic: Quiz 3 prep
- Replies: 3
- Views: 690
Re: Quiz 3 prep
sorry i mean when you write it out as a formula
- Sun Nov 13, 2016 10:09 pm
- Forum: Naming
- Topic: Quiz 3 Prep
- Replies: 1
- Views: 557
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...
- Sun Nov 13, 2016 9:56 pm
- Forum: Naming
- Topic: Quiz 3 prep
- Replies: 3
- Views: 690
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.
- Fri Nov 11, 2016 11:12 am
- Forum: Naming
- Topic: naming [ENDORSED]
- Replies: 2
- Views: 576
naming [ENDORSED]
When do you use bis and tris rather than bi and tri?
- Thu Nov 03, 2016 9:09 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: HF Diagram
- Replies: 1
- Views: 423
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?
- Wed Nov 02, 2016 1:03 pm
- Forum: Lewis Structures
- Topic: Octet rule
- Replies: 7
- Views: 1191
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?
- Tue Nov 01, 2016 5:46 pm
- Forum: Hybridization
- Topic: hybridization
- Replies: 2
- Views: 593
hybridization
Which P orbitals form with s to create SP first? Also which P's create Pi bonds? is it Pz's?
- Sun Oct 30, 2016 3:02 pm
- Forum: Hybridization
- Topic: Lone pairs [ENDORSED]
- Replies: 1
- Views: 514
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?
- Fri Oct 28, 2016 9:52 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Midterm
- Replies: 9
- Views: 1335
Midterm
Anybody know what the material goes up to for the midterm?
- Fri Oct 28, 2016 7:29 pm
- Forum: Hybridization
- Topic: 25.d
- Replies: 2
- Views: 667
25.d
Hello, why would this molecule in problem 25.d be polar?
- Thu Oct 27, 2016 12:49 pm
- Forum: Hybridization
- Topic: VESPR
- Replies: 2
- Views: 885
VESPR
Why would ClO2 + be trigonal pyramidal and not bent?