CHEMISTRY COMMUNITY

cara_Budzinski_3D

When you have to reverse a half reaction, how do you know which one should be flipped? Is it the half-reaction with a lower cell potential?

cara_Budzinski_3D

Will all substituents have a preference for the equatorial position, as a general rule? I know that bigger substituents have a higher preference for the equatorial position, but will there ever be substituents that favor the axial position?

cara_Budzinski_3D

Is it more stable for there to be steric strain or torsional strain? Does it depend on the molecule?

cara_Budzinski_3D

Is bond angle strain only present when the C-C-C angle is anything other than 109.5? And the closer it is to 109.5, the less angle strain?

cara_Budzinski_3D

Is there an energy barrier that must be overcome for cyclobutane to move from one part of the butterfly conformation to the other, since it must briefly reassume a planar shape?

cara_Budzinski_3D

What role does electron density play in conformations? I know that the space filling model better shows electron density than other models, such as the ball and stick model, but what advantage does that have? Does changing conformation affect electron density?

cara_Budzinski_3D

On page 102 of the course reader, the name for 2-cyclopropyl-pentane is found from the given molecule. I understand how this conclusion was reached, but I do not understand why it is cyclopropyl instead of cyclopropane. So my question is this: what is the reasoning for inserting a -pyl suffix (just ...

cara_Budzinski_3D

An intermediate species is cancelled out in a multi-step reaction. For example, in a 2 step reaction if the product of Step One is a reactant in Step Two, then it is an intermediate. This is because does not appear in the initial reactants or final products. Catalysts, in contrast, provide a new pat...

cara_Budzinski_3D

The equation w=PdeltaV is used when there is a constant pressure when calculating work. The equation w=-nRTln(V2/V1) is used when there is constant temperature.

cara_Budzinski_3D

You use w=-P(external) x V when there is constant pressure, and you use w=-nRT x ln (Vfinal/Vinitial) when there is constant temperature (isothermal); when there is constant volume, w=0

cara_Budzinski_3D

You would use the formula Q=m(deltaT) because you are trying to find Q without a phase shift. If there was a phase shift, such as from water to water vapor, then you would need to use Q=m(c)(deltaT) formula.

cara_Budzinski_3D

What kind of fruit did Avogadro eat in the summer?
WaterMOLEns

cara_Budzinski_3D

Are ICE tables only used for weak acids or bases? So how would you calculate pH of a strong acid? Would you just take the negative log of the initial molarity? If so, what is the reasoning behind that?

cara_Budzinski_3D

sigma bonds are not single bonds, and pi bonds are not double bonds. a single bond has one sigma bond, a double bond has one sigma and one pi bond, and a triple bond has one sigma and two pi bonds.

cara_Budzinski_3D

You solve for Kp when dealing with a gaseous reaction. You solve for Kc when dealing with any other reaction (but only include aqueous components in your K expression). Hope this helps!

cara_Budzinski_3D

nope, but we need to know it for the final

cara_Budzinski_3D

it does depend on electronegativity, and the arrow points to the MORE electronegative atom. formal charge is not a determining factor here

cara_Budzinski_3D

would it be safe to assume that sp3 hybridization corresponds to single bonds, sp2 hybridization to double bonds, and sp1 to triple bonds in a general sense?

cara_Budzinski_3D

How many bonds are in H3O+ ? I can't figure out a way to draw this structure while following the octet rule. Since H can only bond once, you can't make any double bonds. But since this is an ion with one less electron, you are left with a singule electron that is not bonded on the O, which you can't...

cara_Budzinski_3D

Okay so to answer your questions... 1) yes; if you look in the course reader, that is exactly how they are labelled 2) if i understand your question, then yes; l assigns a value (referred to as subshell) to each orbital (s, p, d, or f) and the highest l value, say l=4, will contain not only the f-or...

cara_Budzinski_3D

If by compounds you mean polyatomic ions, then yes! A good rule of thumb is to start by remembering that almost all of them have negative charges; it's a lot easier to remember the few exceptions (like ammonium) that way. Other than that, it's pretty much memorization. As you study them, you should ...

cara_Budzinski_3D

How does electrical field correspond to amplitude? I'm not quite sure of the relationship here.

CHEMISTRY COMMUNITY

Search found 22 matches

balancing half-reactions

substituents

stability

bond angle strain

energy barriers

Electron Density and Conformations

Naming (from example in course reader)

Re: Catalyst vs. Intermediate Species

Re: work

Re: Work Equation Derivation

Re: Thermodynamics: The First Law

Re: Post All Chemistry Jokes Here

Equilibrium concentrations

Re: Bond Strength [ENDORSED]

Re: Partial Pressure or Concentration

Re: MO bonding notation

Re: Dipole Moment

hybridization with sigma and pi bonds

Drawing Lewis structures

Re: Quantum Numbers n, l, and m

Re: Naming Compounds

Re: Unique Frequencies with atoms/molecules