CHEMISTRY COMMUNITY

Michael Lesgart 1H

So for the psuedo equilibrium constant K dagger, you would use this equation

deltaG dagger=-RT ln(K dagger) with dagger referring to the transition state

On my quiz you solved for delta G in the previous question and he temperature was given, so you would just have to solve for K

Michael Lesgart 1H

Also, it is useful to note electronegativity in a molecule that can cause it to become an electrophile. For example, CO2 is an electrophile because of the dipole moments created by the negative charge of the O with the positive charge of the C, and the electronegativity of the Oxygens cause the Carb...

Michael Lesgart 1H

When the question asks you to find the rate equation, what do you do when your equation requires you to know the concentration of an intermediate species? Are you supposed to replace it by looking at the fast reaction and setting the forward rate equal to the reverse rate? Or is there another method...

Michael Lesgart 1H

I believe that the fast step is at equilibrium and the slow step is not at equilibrium. Also do you know if you use the pre-equilibrium approach if the fast step comes before the slow step or after the slow step?

Michael Lesgart 1H

Is there a general trend that relates temperature and half-life? Does a higher temperature correlate to a lower half live or vice versa?

Michael Lesgart 1H

How do the standard reaction potential reactions translate to oxidizing agents? Does a higher voltage mean that a reaction is a better oxidizing agent and vice versa?

Michael Lesgart 1H

I have a follow up question, what allows for a current to flow: the electrons themselves or the electron movement from anode to cathode? Also, during a redox reaction, does the salt bridge allow for the reaction to occur multiple times so that a continuous charge is being generated?

Michael Lesgart 1H

In reversible reactions, reactants react with other reactants to form products, and the products react with other products to form more reactants. Essentially, it is a reaction cycle. In an irreversible reaction, reactants react with other reactants to form products, and the products do not form rea...

Michael Lesgart 1H

I would think that if the problem doesn't mention pressure change, you can assume that it is under conditions of constant pressure.
I may be wrong though

Michael Lesgart 1H

Is it true that energy can only exist in the system or surroundings? or is it somehow lost when the piston is moved and work is done?

Michael Lesgart 1H

Would it be necessary to draw out the Lewis structure with a formal charge of 0 in order to determine a molecule's most stable form? Or is there another method that can be used?

Michael Lesgart 1H

The Henderson-Hasselbach Equation is pH=pKa + log ([A-]/[HA]) [HA] is the molar concentration of the weak acid, [A⁻] is the molar concentration of this acid's conjugate base, and pKa is −log10 Ka where Ka is the acid dissociation constant. So if we are given the pH, pKa, and the concentration of [HA...

Michael Lesgart 1H

I assume its the Hydrogen furthest away from the "center of the molecule" because it can easily be transferred whereas the H in the H3 isn't easily transferred, but I may be mistaken.

Michael Lesgart 1H

I guess you can use this as a strategy:
A Bronsted acid donates protons, A Lewis acid accepts electrons
A Bronsted base accepts protons, A Lewis base donates electrons
Also, you can visualize the potential reaction and see if protons are donated or accepted.
Hope this helped!

Michael Lesgart 1H

You ignore the concentration of solids and liquids because they have a constant concentration. Liquids and solids cannot be compressed because the molecules are very close together; without compression there is no change is concentration (like there is when gasses are compressed.) For these reasons,...

Michael Lesgart 1H

Yes. I'm pretty sure that MO theory will be on the exam. We covered it in class and it wasn't on the midterm so its safe to say that its going to be on there

Michael Lesgart 1H

I assume that the equations must mean that the first hybridization for the atom has one s orbital and 3 p orbitals (hence px, py, pz). Therefore, you can conclude that the hybridization is sp3. You can also determine the hybridization of an atom by finding how many regions of electron density there ...

Michael Lesgart 1H

When n=5, l can equal 0,1,2,3,4 which corresponds to the s,p,d,f, and (theoretically) g subshells. 5s has one orbital (maximum of 2 electrons), 5p has three orbitals (maximum of 6 electrons), 5d has five orbitals (maximum of 10 electrons), 5f has 7 orbitals (maximum of 14 electrons), and 5g would th...

Michael Lesgart 1H

Whether or not an element has an unpaired electron depends on the total number of electrons in the molecule. So you would first need to find the total number of valence electrons and then you would draw a lewis structure (try to follow the octet rule). You would then figure out how many electrons wo...

Michael Lesgart 1H

When writing out the chemical equation, should we include the state that the chemical is in? so would it be N2(g) + O2(g) ==> 2NO(g)

Michael Lesgart 1H

For testing purposes, is there a difference between writing 1.8 x 10^-2 and 0.018? I know they're synonymous, but I've seen both used in the textbook and workbook so I was wondering if there is a preference for either when it comes to giving a final answer. I would use 1.8 x 10^-2 because it is in ...

Michael Lesgart 1H

Oh ok thank you very much for the clarification

Michael Lesgart 1H

Wouldnt you get a different answer if you use a different constant?

Michael Lesgart 1H

Why do you use 1.097 x 10^7 instead of 3.29 x 10^15 for R?

Michael Lesgart 1H

I noticed in your work that you equated frequency (v) to 1/ $\lambda$ but actually, frequency (v) is equal to $3.00 x 10^8$ / $\lambda$

Michael Lesgart 1H

In an atomic spectroscopy experiment, what exactly is detected? Is it all light or just emitted light?

CHEMISTRY COMMUNITY

Search found 26 matches

Re: Quiz 2 question

Re: Nucleophile vs Electrophile

Re: Slow Reaction

Re: Slow Reaction

Re: Concept of Half Life [ENDORSED]

Re: highest possible charge [ENDORSED]

Re: Salt bridge

Re: Reversibly & Isothermally

Re: Assuming Constant Pressure?

Re: Energy of the system during expansion [ENDORSED]

Re: Most Stable Form

Re: Henderson-Hasselbalch Equation: Solving for acid

Re: Conjugate Acids/Bases Proton Acceptors/Donors

Re: J Section Question 1

Re: Neglecting solids and liquids

Re: Quiz #3 [ENDORSED]

Re: Hybridizaton Textbook equation

Re: Midterm 2007 review question [ENDORSED]

Re: Unpaired Electrons

Re: Naming Chemical Formula and Balancing Chemical Equations [ENDORSED]

Re: All students read this sig fig post [ENDORSED]

Re: Atomic Spectra AV post assessment #31 [ENDORSED]

Re: Atomic Spectra AV post assessment #31 [ENDORSED]

Re: Atomic Spectra AV post assessment #31 [ENDORSED]

Re: Atomic Spectra AV post assessment #24

Atomic Spectroscopy Experiment Setup