Search found 19 matches
- Mon Mar 07, 2016 1:41 am
- Forum: *Complex Reaction Coordinate Diagrams
- Topic: Reaction Profiles
- Replies: 1
- Views: 758
Reaction Profiles
In question 4.40 in the Introduction to Organic Chemistry workbook, how do we know if the reactants or products are thermodynamically stable. Also how do we determine if a reaction is kinetically controlled?
- Mon Feb 29, 2016 1:25 am
- Forum: *Electrophilic Addition
- Topic: Mechanisms for electrophilic addition
- Replies: 1
- Views: 319
Mechanisms for electrophilic addition
In an electrophilic addition mechanism, how do we know which one is the nucleophile and which is the electrophile?
- Sun Feb 21, 2016 10:13 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Intermediates and Catalysts in a reaction mechanism
- Replies: 1
- Views: 411
Intermediates and Catalysts in a reaction mechanism
How do you know if a molecule in a proposed reaction mechanism is an intermediate or a catalyst?
- Mon Feb 15, 2016 1:47 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Determining the slow reaction mechanism
- Replies: 1
- Views: 358
Determining the slow reaction mechanism
How do you know which of the reactions in a proposed reaction mechanism is the determining/slow reaction?
- Sun Feb 07, 2016 9:51 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Formula for heat
- Replies: 1
- Views: 355
Formula for heat
Why is q=nC (delta)t sometimes written as q=C (delta)t?
- Mon Feb 01, 2016 12:07 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Battery Diagram
- Replies: 1
- Views: 347
Cell Battery Diagram
I am still unsure as to how the cell battery works exactly. More specifically, what is the difference between the "interface between phases" and the salt bridge?
- Sun Jan 24, 2016 6:58 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: How do you find the degrees of freedom
- Replies: 1
- Views: 3204
How do you find the degrees of freedom
What exactly are the degrees of freedom for a gas molecule and how would one calculate this number for diatomic and monatomic ideal gases?
- Fri Jan 22, 2016 7:00 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy
- Replies: 1
- Views: 352
Gibbs Free Energy
Why is it that if "G" is a minimum then any negative value changes are always spontaneous?
- Sun Jan 17, 2016 6:57 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Definition of degeneracy and relationship to entropy
- Replies: 6
- Views: 2560
Definition of degeneracy and relationship to entropy
I am still unsure as to what exactly degeneracy is, and how degeneracy is related to entropy.
- Mon Jan 11, 2016 10:32 am
- Forum: Phase Changes & Related Calculations
- Topic: State Properties
- Replies: 2
- Views: 390
State Properties
If enthalpy is equal to heat (at constant pressure), and enthalpy is a state function, why isn't heat (q) considered a state function as well?
- Sun Nov 29, 2015 11:39 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Ka2 and Ka1
- Replies: 1
- Views: 690
Ka2 and Ka1
I know that Ka2 is typically smaller than Ka1, but why exactly is this the case? It was mentioned in the lecture that it was because it is harder for the molecule to lose another H atom, but I am not sure why it is harder for the molecule to lose another H atom.
- Sun Nov 22, 2015 11:18 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Bidentate or Polydentate
- Replies: 2
- Views: 548
Bidentate or Polydentate
I am confused as to why oxalato is considered bidentate, even though it has at least two lone pairs on each of the four oxygen atoms. If each oxygen atom were only able to form one of these types of bonds, wouldn't oxalato be able to donate 4 electron pairs making it a polydentate?
- Sun Nov 15, 2015 11:59 pm
- Forum: Naming
- Topic: Written Formula to Chemical Formula
- Replies: 1
- Views: 293
Written Formula to Chemical Formula
When going from the chemical formula, such as [Cr(NH3)3(OH2)2(OH)]Cl, to the written formula we write triamminediaquahydroxidochromium (II) chloride, with the ligands in alphabetical order, but how do we arrange the ligands when going from the written formula to the chemical formula?
- Mon Nov 09, 2015 12:32 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Gas Constant
- Replies: 1
- Views: 239
Gas Constant
I noticed that there were two gas constants, R=8.314 JxK^-1 x mol^-1 and R=.0821 Lxatm/molxK
which types of problems would require the first one and which types of problems would require the second constant?
which types of problems would require the first one and which types of problems would require the second constant?
- Sun Nov 01, 2015 11:18 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 1
- Views: 338
Ligands
I was reading Table 17.4 on page 742, I noticed that there are only ligands with either a neutral charge or negative charge, why aren't there any positively charged ligands?
- Sun Oct 25, 2015 11:12 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Shape
- Replies: 1
- Views: 280
VSEPR Shape
In the lecture we determined that XeF4 had 6 regions of electron density, but when determining its 3-d shape we ignore the two lone pairs on the opposite poles of XeF4 in order to get a square planar shape. Why do we ignore the lone pairs when determining its shape?
- Sun Oct 18, 2015 10:24 pm
- Forum: Bond Lengths & Energies
- Topic: Dissociation Energies
- Replies: 1
- Views: 320
Dissociation Energies
Why does the dissociation energy get smaller as the atom get bigger, wouldn't it take more energy to dissociate a large atom compared to a smaller one?
- Mon Oct 12, 2015 1:14 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Dz^2 Orbital
- Replies: 1
- Views: 722
Dz^2 Orbital
If this orbital has a ring around it, would it still have 2 nodes like the other d orbitals?
- Sun Oct 04, 2015 11:26 pm
- Forum: Photoelectric Effect
- Topic: Intensity's Impact on the Photoelectric Effect
- Replies: 1
- Views: 318
Intensity's Impact on the Photoelectric Effect
In the Chemical Principles book, it mentions that electrons are ejected regardless of the intensity, assuming that the radiation is within the threshold value. Would electrons still be ejected if the intensity was zero or negligible?