Search found 24 matches
- Fri Mar 17, 2017 4:16 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Steric vs. Torsional
- Replies: 1
- Views: 468
Steric vs. Torsional
What is the difference between steric and torsional strain and how would we identify that when looking at the structure?
- Tue Mar 07, 2017 12:25 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Quiz 2 Question
- Replies: 2
- Views: 688
Quiz 2 Question
I'm confused about #3, part a on Quiz 2 (where we are asked to determine the rate limiting step): It makes sense that k1 << k2 implies that k1 is the slow step. However, I don't understand why the reaction at equilibrium is considered the slow step. Usually the slow step isn't at equilibrium and the...
- Mon Feb 27, 2017 12:30 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
- Mon Feb 27, 2017 12:25 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pre-Equilibrium approach
- Replies: 1
- Views: 382
Pre-Equilibrium approach
When the slow step comes before the fast step, can the pre-equilibrium approach still be used?
- Sat Feb 18, 2017 10:46 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
Re: Post All Chemistry Jokes Here
What do you do with a sick chemist?
If you can't helium, and you can't curium, then you might as well barium
If you can't helium, and you can't curium, then you might as well barium
- Sat Feb 11, 2017 9:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
- Sun Feb 05, 2017 3:06 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
Re: Post All Chemistry Jokes Here
I'm always in my element...unless I'm in chemistry class.
- Sun Feb 05, 2017 3:02 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
- Sat Jan 28, 2017 4:04 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy=enthalpy/T
- Replies: 2
- Views: 582
Entropy=enthalpy/T
When is the equation [delta]S = [delta]H / T negative? I'm confused because the solutions manual contradicts the formula sheet and I'm not sure which one is right (and how to understand this conceptually).
- Fri Jan 20, 2017 3:46 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: temperature [ENDORSED]
- Replies: 2
- Views: 706
temperature [ENDORSED]
When temperature is involved in the problem, do we use [delta]nRT instead of -P[delta]V for w?
- Thu Jan 12, 2017 8:05 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
Re: Post All Chemistry Jokes Here
Chemistry is a pain in the acid!!!!!
- Sat Dec 03, 2016 9:29 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: When to round?! [ENDORSED]
- Replies: 1
- Views: 475
When to round?! [ENDORSED]
When calculating pH and concentrations, do we wait to round until the end? I am confused because this is usually how it goes, but the solutions manual rounds every single step of the way.
- Fri Dec 02, 2016 9:25 am
- Forum: *Biological Importance of Buffer Solutions
- Topic: Heisenberg-Hasselbach
- Replies: 2
- Views: 1661
Heisenberg-Hasselbach
Is the Heisenberg-Hasselback equation just a shortcut?
- Fri Nov 25, 2016 8:03 am
- Forum: Bronsted Acids & Bases
- Topic: Strong vs. weak
- Replies: 3
- Views: 870
Strong vs. weak
How do we tell the difference between a strong acid or base and a weak one? I know that it refers to the donation of protons, but how can we tell by looking at a chemical equation?
- Tue Nov 15, 2016 5:53 pm
- Forum: Naming
- Topic: Is Carbonate bicarbonato or bis(carbonato) [ENDORSED]
- Replies: 4
- Views: 1352
Re: Is Carbonate bicarbonato or bis(carbonato) [ENDORSED]
I asked a UA this question, and they said to use the bis-, tris-, etc... prefixes whenever a compound is polydentate. If there is a "di" or "tri" in the molecule, that's a dead giveaway to use the other prefixes, but this rule isn't restricted to just those. Therefore, YES, it wo...
- Tue Nov 15, 2016 5:29 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Shift in Equilibria
- Replies: 1
- Views: 533
Shift in Equilibria
When equilibria shifts, what occurs to the reactants and products from which it is shifting? For example, if we decrease the pressure of one of the reactants, the equilibria will shift left in order to try to replace the lost pressure. Does this shift mean the pressure of the products will decrease?...
- Sat Nov 12, 2016 5:43 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
Re: Post All Chemistry Jokes Here
I've got my ion everyone that is on this website
- Sun Nov 06, 2016 1:51 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Differentiating between shapes of structure
- Replies: 1
- Views: 403
Differentiating between shapes of structure
When constructing a MO structure, I know that there are two different ones for a certain value of Z. Does Z refer to atomic number? What if one element of a compound has Z>8 and one has Z<8?
- Sun Nov 06, 2016 1:48 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
Re: Post All Chemistry Jokes Here
This chemistry joke is sodium funny!!!
- Thu Oct 27, 2016 4:40 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Presence of Lone Pairs [ENDORSED]
- Replies: 2
- Views: 551
Presence of Lone Pairs [ENDORSED]
When determining the shape of an atom using VSEPR, how do we determine which region of electron density to replace with a lone pair? We learned about this in Wednesday's lecture but this part was unclear to me.
Thank you!
Thank you!
- Thu Oct 20, 2016 9:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3009195
Re: Post All Chemistry Jokes Here
I'm trying to zinc of a good chemistry joke but it seems like all of the good ones argon. ;)
- Fri Oct 14, 2016 9:54 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Magnetic Quantum Number
- Replies: 1
- Views: 529
Magnetic Quantum Number
Could someone explain the concept of the magnetic quantum number? I know it refers to the orientation of the electron, but how can that be applied in context?
- Tue Oct 04, 2016 10:05 pm
- Forum: DeBroglie Equation
- Topic: Wavelength of Ejected Electron [ENDORSED]
- Replies: 3
- Views: 971
Wavelength of Ejected Electron [ENDORSED]
Hello,
When asked to calculate the wavelength of an ejected electron, do we use the DeBroglie Equation?
I know that it involves finding the wavelength of a moving object and just want to clarify that we aren't supposed to use the lambda=hc/E equation.
Thanks!
When asked to calculate the wavelength of an ejected electron, do we use the DeBroglie Equation?
I know that it involves finding the wavelength of a moving object and just want to clarify that we aren't supposed to use the lambda=hc/E equation.
Thanks!
- Tue Sep 27, 2016 7:12 pm
- Forum: Limiting Reactant Calculations
- Topic: Limiting Reactant given masses
- Replies: 2
- Views: 876
Limiting Reactant given masses
When finding a limiting reactant, what if the mass of only one reactant is given?
E.x. Consider the unbalanced reaction: PCl3+ H2O --->HCl + H3PO3 What mass of HCl is produced by the reaction of 23.6g of PCl3?
I'm confused because the grams of PCl3 is given, but there is no amount given for H20.
E.x. Consider the unbalanced reaction: PCl3+ H2O --->HCl + H3PO3 What mass of HCl is produced by the reaction of 23.6g of PCl3?
I'm confused because the grams of PCl3 is given, but there is no amount given for H20.