Search found 20 matches
- Fri Mar 17, 2017 7:27 pm
- Forum: General Rate Laws
- Topic: Catalysts in Rate Law
- Replies: 1
- Views: 607
Catalysts in Rate Law
Are catalysts included in the overall rate law or the rate determining step of a mechanism.
- Sun Mar 12, 2017 9:01 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Gauche Conformation
- Replies: 1
- Views: 472
Gauche Conformation
Is the Gauche conformation unique to Butane or is it a term used for other organic compounds as well?
- Sun Mar 05, 2017 8:46 pm
- Forum: *Electrophilic Addition
- Topic: Number of Steps in Electrophilic Addition
- Replies: 1
- Views: 1155
Number of Steps in Electrophilic Addition
How do we know how many steps there are in the mechanism? For example in the course reader, when looking at the reaction between 2-Butene and HBr, how do we know that both H and Br are not bonded simultaneously but rather in two separate steps?
- Sun Feb 26, 2017 8:40 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Slow Equilibrium Step?
- Replies: 2
- Views: 894
Slow Equilibrium Step?
When determining the slow step of a reaction is it possible to have a slow equilibrium step?
- Fri Feb 17, 2017 12:00 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Heat of Combustion
- Replies: 1
- Views: 500
Heat of Combustion
Can the heat of combustion be used during Hess's Law similar to the Heat of formation when the reaction forms a gaseous compound?
- Sat Feb 11, 2017 3:03 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic Cells [ENDORSED]
- Replies: 1
- Views: 448
Galvanic Cells [ENDORSED]
In a galvanic cell, why do we need to include a metal like platinum that doesn't react instead of a solid metal of the aqueous ion in solution?
- Sun Feb 05, 2017 12:22 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Charge for Anode and Cathode
- Replies: 2
- Views: 528
Charge for Anode and Cathode
in a galvanic cell, is the anode the oxidation half- reaction with a negative charge and the cathode the reduction with a positive charge?
- Sun Jan 29, 2017 4:53 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy at Equilibrium
- Replies: 1
- Views: 433
Gibbs Free Energy at Equilibrium
What is the equilibrium condition for Gibbs Free Energy? Is it DeltaG=0?
- Sun Jan 22, 2017 11:59 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Internal Energy and State Function [ENDORSED]
- Replies: 1
- Views: 547
Internal Energy and State Function [ENDORSED]
I know the first law of thermo explains how DeltaU = q and w, but I dont understand how this relationship exists if q and w are not state functions but DeltaU is.
- Sat Jan 14, 2017 1:20 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Heat Capacity
- Replies: 3
- Views: 628
Heat Capacity
What is the difference between heat capacity and specific heat capacity?
- Sat Dec 03, 2016 4:45 pm
- Forum: Hybridization
- Topic: Hybridization of lone pairs on elements
- Replies: 1
- Views: 491
Hybridization of lone pairs on elements
When writing the composition of bonds, why do the lone pairs on the atoms have a hybridization? For example in a molecule with a C double bonded to an O with 2 lone pairs on the O, why does the composition of the atom have Osp2 for the electron pairs?
- Fri Nov 25, 2016 5:56 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: Salts as Acids and Bases
- Replies: 1
- Views: 561
Salts as Acids and Bases
How do we know if certain anions affect the pH of a solution or not. In the course reader, for a solution containing NH4+ and Cl- it says that Cl- doesn't affect the pH, but how do we know this?
- Sun Nov 20, 2016 7:55 pm
- Forum: Conjugate Acids & Bases
- Topic: pOH from pH [ENDORSED]
- Replies: 2
- Views: 733
pOH from pH [ENDORSED]
How do we find the pOH if we are only given the concentration of hydronium ion?
- Sat Nov 12, 2016 4:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K value
- Replies: 1
- Views: 554
K value
why does the equilibrium constant exclude the products and reactants that are in solid or liquid state?
- Thu Nov 03, 2016 4:06 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Splitting Energy
- Replies: 2
- Views: 705
Splitting Energy
What is splitting energy and how does it relate to atomic orbitals?
- Fri Oct 28, 2016 3:26 pm
- Forum: Hybridization
- Topic: Hybridization of Benzene
- Replies: 1
- Views: 3341
Hybridization of Benzene
When explaining the regions of electron density for the Benzene structure Dr. Lavelle explained that the Carbon atoms have the planar hybridized sp2 orbitals but also perpendicular p orbitals. are these p orbitals the unhybridized orbitals with the extra unpaired electron? I didn't really understand...
- Sat Oct 22, 2016 2:07 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Character and Covalent Character in bonds
- Replies: 1
- Views: 3317
Ionic Character and Covalent Character in bonds
How do we determine the relative strength of the Ionic character or covalent character in bonds? What causes a bond to have greater ionic character than others?
- Sat Oct 15, 2016 2:08 pm
- Forum: Lewis Structures
- Topic: Resonance [ENDORSED]
- Replies: 5
- Views: 1081
Resonance [ENDORSED]
Im confused about resonance. What does it mean when it says that some lewis structures have multiple bonds in different equivalent locations?
- Fri Oct 07, 2016 8:37 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electrostatic Potential Energy relationship
- Replies: 1
- Views: 462
Electrostatic Potential Energy relationship
In the course reader it says that the Electrostatic Potential Energy is proportional to (q1 x q2)/ r but does that refer to the charges between the nucleus and the valence electrons or the charge between two different atoms?
- Wed Sep 28, 2016 11:54 pm
- Forum: Significant Figures
- Topic: Constants and Significant Figures
- Replies: 3
- Views: 2831
Constants and Significant Figures
Do constants like Planck's Constant limit the final amount of significant figures? I know the course reader rounds to 3 significant figures but other sources give it many more. How do we know how many to use?