Search found 22 matches

by cara_Budzinski_3D
Sat Mar 18, 2017 3:18 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: balancing half-reactions
Replies: 1
Views: 180

balancing half-reactions

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?
by cara_Budzinski_3D
Sat Mar 18, 2017 1:25 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: substituents
Replies: 1
Views: 435

substituents

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?
by cara_Budzinski_3D
Sat Mar 18, 2017 1:13 am
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: stability
Replies: 1
Views: 366

stability

Is it more stable for there to be steric strain or torsional strain? Does it depend on the molecule?
by cara_Budzinski_3D
Fri Mar 17, 2017 11:13 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: bond angle strain
Replies: 1
Views: 215

bond angle strain

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?
by cara_Budzinski_3D
Fri Mar 17, 2017 10:47 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: energy barriers
Replies: 3
Views: 598

energy barriers

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?
by cara_Budzinski_3D
Fri Mar 17, 2017 2:59 am
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Electron Density and Conformations
Replies: 1
Views: 478

Electron Density and Conformations

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?
by cara_Budzinski_3D
Fri Mar 17, 2017 2:15 am
Forum: *Cycloalkanes
Topic: Naming (from example in course reader)
Replies: 1
Views: 364

Naming (from example in course reader)

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 ...
by cara_Budzinski_3D
Wed Mar 08, 2017 2:43 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst vs. Intermediate Species
Replies: 2
Views: 559

Re: Catalyst vs. Intermediate Species

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...
by cara_Budzinski_3D
Tue Jan 31, 2017 11:09 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: work
Replies: 2
Views: 317

Re: work

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.
by cara_Budzinski_3D
Sun Jan 29, 2017 3:56 pm
Forum: Calculating Work of Expansion
Topic: Work Equation Derivation
Replies: 1
Views: 198

Re: Work Equation Derivation

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
by cara_Budzinski_3D
Wed Jan 11, 2017 7:02 pm
Forum: Calculating Work of Expansion
Topic: Thermodynamics: The First Law
Replies: 1
Views: 233

Re: Thermodynamics: The First Law

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.
by cara_Budzinski_3D
Thu Dec 01, 2016 7:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 927234

Re: Post All Chemistry Jokes Here

What kind of fruit did Avogadro eat in the summer?
WaterMOLEns
by cara_Budzinski_3D
Mon Nov 28, 2016 2:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium concentrations
Replies: 1
Views: 185

Equilibrium concentrations

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?
by cara_Budzinski_3D
Fri Nov 18, 2016 3:09 pm
Forum: Sigma & Pi Bonds
Topic: Bond Strength [ENDORSED]
Replies: 2
Views: 943

Re: Bond Strength [ENDORSED]

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.
by cara_Budzinski_3D
Sun Nov 13, 2016 6:53 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Partial Pressure or Concentration
Replies: 3
Views: 355

Re: Partial Pressure or Concentration

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!
by cara_Budzinski_3D
Thu Nov 03, 2016 7:15 pm
Forum: Sigma & Pi Bonds
Topic: MO bonding notation
Replies: 1
Views: 273

Re: MO bonding notation

nope, but we need to know it for the final
by cara_Budzinski_3D
Thu Nov 03, 2016 7:12 pm
Forum: Hybridization
Topic: Dipole Moment
Replies: 2
Views: 362

Re: Dipole Moment

it does depend on electronegativity, and the arrow points to the MORE electronegative atom. formal charge is not a determining factor here
by cara_Budzinski_3D
Thu Oct 27, 2016 9:39 pm
Forum: Sigma & Pi Bonds
Topic: hybridization with sigma and pi bonds
Replies: 1
Views: 308

hybridization with sigma and pi bonds

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?
by cara_Budzinski_3D
Fri Oct 21, 2016 1:34 pm
Forum: Ionic & Covalent Bonds
Topic: Drawing Lewis structures
Replies: 1
Views: 226

Drawing Lewis structures

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...
by cara_Budzinski_3D
Wed Oct 12, 2016 2:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Quantum Numbers n, l, and m
Replies: 2
Views: 248

Re: Quantum Numbers n, l, and m

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...
by cara_Budzinski_3D
Thu Oct 06, 2016 4:43 pm
Forum: Balancing Chemical Reactions
Topic: Naming Compounds
Replies: 2
Views: 370

Re: Naming Compounds

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 ...
by cara_Budzinski_3D
Wed Sep 28, 2016 11:14 pm
Forum: Properties of Light
Topic: Unique Frequencies with atoms/molecules
Replies: 3
Views: 395

Re: Unique Frequencies with atoms/molecules

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

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