Are electrophilic addition reactions always two step?
Does S2N mean the reaction goes from 2 molecules in the reactants to 2 molecules in the products?
Search found 22 matches
- Sat Mar 18, 2017 11:00 pm
- Forum: *Electrophilic Addition
- Topic: Reaction step naming
- Replies: 3
- Views: 1554
- Fri Mar 10, 2017 3:07 pm
- Forum: *Cycloalkenes
- Topic: Numbering carbon atoms
- Replies: 1
- Views: 1332
Numbering carbon atoms
For numbering the carbon atoms for cycloalkanes. Why do we not find the longest chain and start with that as opposed to just counting the ring structure
- Sat Mar 04, 2017 5:35 pm
- Forum: *Complex Reaction Coordinate Diagrams
- Topic: Naming compounds
- Replies: 1
- Views: 1188
Naming compounds
What is the rule on numbering the Carbon atoms? How do we know which Carbon to label as number 1?
- Fri Feb 24, 2017 6:10 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Electrophiles
- Replies: 3
- Views: 817
Electrophiles
Why are elements like Florine and Chlorine which have so many electrons considered electrophiles? Shouldn't they be attracted to positive species?
- Sun Feb 19, 2017 9:24 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Differential Rate Law
- Replies: 1
- Views: 493
Re: Differential Rate Law
In certain cases you can use the product concentrations but it is not always accurate because sometimes the product that gets formed cant go back to reactants lile gas going into the surroundings. So it is more reliable to use the inital reactants concentration.
- Mon Feb 13, 2017 2:14 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: electrodes
- Replies: 1
- Views: 401
electrodes
What do we do when we are given a redox reaction and there is no solid metal conductor for one of the half reactions? How do electrons get transferred in that case?
- Mon Feb 13, 2017 2:10 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Gibbs free energy
- Replies: 2
- Views: 699
Gibbs free energy
Why is it so that the work maximum is equal to delta G?
- Mon Feb 13, 2017 2:09 pm
- Forum: General Rate Laws
- Topic: Overall Rate Law
- Replies: 1
- Views: 531
Re: Overall Rate Law
Yes the overall rate law is the same as the slowest rate because the slowest rate of the reaction is the rate determining step so that will be what the overall rate of the reaction is dependent on
- Wed Feb 01, 2017 1:35 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing reactions
- Replies: 4
- Views: 820
Balancing reactions
When we balance half reactions, and double the reaction, why do we not double the E(not)? Why is it kept constant but when flipped it, we must change the E to negative?
- Fri Jan 27, 2017 7:39 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs equilibrium
- Replies: 1
- Views: 449
Gibbs equilibrium
Are equilibrium conditions when delta G = 0 or when delta G (not) =0? Why? Also why is the system not at equilibrium if Gr doesn't equal Gp?
- Fri Jan 20, 2017 1:58 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Work of Expansion [ENDORSED]
- Replies: 2
- Views: 663
Work of Expansion [ENDORSED]
For Work of expansion, why must we measure the changes in energy for in very small steps? And therefore having to use an integral for the infinitesimal changes in volume? When do we use w=-pV as opposed to the integral equation for w?
- Sun Jan 15, 2017 11:22 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Clarification on units
- Replies: 1
- Views: 432
Re: Clarification on units
You use KJ's when the question asks for enthalpy. However KJ/mol is used when dealing with standard enthalpy of formation. The reason is that standard enthalpy of formation is calculated per one mole of that product.
- Wed Nov 30, 2016 1:36 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Calculating pH
- Replies: 1
- Views: 534
Calculating pH
In the course reader it says if H30+ is less than 10^-7, then the solution is considered neutral becausee we know that as a result of autoprotolysis there are 10^-7 mol L^-1 H30+. What exactly does this mean?
- Wed Nov 30, 2016 1:30 pm
- Forum: *Indicators
- Topic: Importance of Indicators
- Replies: 2
- Views: 5273
Importance of Indicators
What is the key aspect we need to know about indicators in titration problems?
- Thu Nov 10, 2016 4:09 pm
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: Drawing MO Diagrams
- Replies: 3
- Views: 4089
Drawing MO Diagrams
When we are asked to draw the molecular orbital theory for a molecule with two different elements, I know we have to draw the orbitals for one element lower than the others but why and which one do we choose? Also what are the important ideas we have to pay attention to when we have two different el...
- Mon Oct 31, 2016 2:32 pm
- Forum: Resonance Structures
- Topic: Stable Lewis Structures
- Replies: 3
- Views: 913
Re: Stable Lewis Structures
I believe it is best to draw the most stable Lewis Structure. So in this case, check the formal charges on each atom to see which structure is most stable and preferred.
- Sat Oct 29, 2016 11:18 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shape for Sulfur Tetrafluoride
- Replies: 1
- Views: 825
Re: Shape for Sulfur Tetrafluoride
When determining the shape first look at how many regions of electron density there are around the central atom. In this case even though S has 4 bonds, it also has a lone pair so 5 total regions of electron density. Making it a trigonal bipyrmidal. However the lone pair creates a strong repulsion w...
- Thu Oct 20, 2016 6:12 pm
- Forum: Lewis Structures
- Topic: Drawing Lewis Structures [ENDORSED]
- Replies: 2
- Views: 666
Drawing Lewis Structures [ENDORSED]
How do we know which element to put as the central atom when drawing lewis structures? Is it the one with the lowest electron affinity or electronegativity?
- Thu Oct 20, 2016 6:05 pm
- Forum: Lewis Structures
- Topic: Forming double bonds [ENDORSED]
- Replies: 1
- Views: 442
Re: Forming double bonds [ENDORSED]
I believe it is because the atom doesn't have any more valence electron to share evenly 1 to 1. So the atom with the lone pair will just share both of it's electrons with the other atom forming a bond. It cannot just give it one of its electrons and hold on to the other one because then a bond doesn...
- Fri Oct 14, 2016 2:45 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Bonds of Octet Outliers
- Replies: 3
- Views: 848
Re: Ionic Bonds of Octet Outliers
Unlike covalent bonding where they share their electrons, in ionic bonding, the elements with high electronegativty like Oxygen and Flourine pull the electrons from He, Li, Be. So oxygen for example would satisfy the octet rule becoming an anion while the metal would become a cation.
- Wed Oct 05, 2016 10:04 pm
- Forum: *Shrodinger Equation
- Topic: Slight Confusion about Orbitals
- Replies: 2
- Views: 550
Re: Slight Confusion about Orbitals
From what I believe, the orbitals tell us roughly the movement of the electrons around the nucleus. They move in wave like form along those dimensions. However they may not be exactly moving on those orbitals because it is hard to determine exactly where they are at a certain time, but they tell us ...
- Mon Sep 26, 2016 11:23 pm
- Forum: Student Social/Study Group
- Topic: Chemistry Jokes
- Replies: 31
- Views: 8993
Re: Chemistry Jokes
1) A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."
2) If you're not part of the solution, you're part of the precipitate.
3) If the Silver Surfer and Iron Man team up, they'd be alloys.
2) If you're not part of the solution, you're part of the precipitate.
3) If the Silver Surfer and Iron Man team up, they'd be alloys.