CHEMISTRY COMMUNITY

Emilee Hosking 1D

Can you please post the solutions to Step Up Week 10?

Emilee Hosking 1D

They way that I think of it is that with the Lewis acids and bases you are considering the transferring of electrons, while with Bronsted protons are being tranferred. Bronsted acids want to remove their H+, which removes a proton, whereas a Lewis acid accepts electrons from a lewis base.

Emilee Hosking 1D

Could someone explain the significance of acid rain?

Emilee Hosking 1D

For an electron with quantum numbers n=3 and l=1, according to the formula (# of degenerate orbitals=2*l+1), the number of degenerate orbitals would be 2. However people have said that for a p orbital there are always 3 degenerates, so now I am confused. Is there any way to further explain this? In ...

Emilee Hosking 1D

Would anyone be able to explain the relationship between a polydentate and a chelate? The textbook says that "polydentate ligands can form chelates" but I'm not very clear on what that means. This is what I found about chelates and polydentates on another post: "Polydentate refers to...

Emilee Hosking 1D

How can you easily tell if a bond is between a central atom and a ligand? Will the central atoms always be a metal or are there exceptions?

Emilee Hosking 1D

In lecture, Professor Lavelle gave an example of a chelate that had only sigma bongs and could rotate, do all chelates only have sigma bonds?

Emilee Hosking 1D

When finding the hybrid orbitals of C2H4, why would you identify the orbitals as one C2sp^2-C2sp^2 and two H1s-C2sp^2 orbitals? I understand how to find what the hybrid orbitals are, but I am not sure how what the 1 and 2s that follow the C and H represent.

Emilee Hosking 1D

I would start by first drawing the lewis structure that way you can easily determine the number of regions of electron density, then use the explanation above.

Emilee Hosking 1D

For 2F3, it asks how many sigma and pi bonds are in SO2. From drawing the lewis structure I found that there are 2 sigma and 2 pi bonds. In the answer key, however it states that there is a resonance structure with 2 sigma bonds and 1 pi bond. How would these two lewis structures have resonance if o...

Emilee Hosking 1D

I think that as long as we are able to understand how the hybridization works and know that the VSEPR model only accounts for bonded atoms then we should be okay for that part.

Emilee Hosking 1D

I understand that the lone pair causes the shape to be seesaw, but can we assume that the lone pairs will be on the top? Would the shape be different if the lone pair was elsewhere?

Emilee Hosking 1D

Are tetrahedrals and molecules that are bent with four domains the only shapes that have bond angles of 109.5?

Emilee Hosking 1D

If a molecule has double bonds is there any difference in the way that we draw the VSEPR model? Would it be the same as one with only single bonds?

Emilee Hosking 1D

Can someone explain what a dipole moment is and what the arrow in the diagram of the dipole represents? Does this have anything to do with polarizability?

Emilee Hosking 1D

Because the dipole-dipole bond is when molecules are polar on their own, and a dipole induced dipole is when there is one polar bond that causes the second non polar bond to exhibit the character of a polar bond, then both types would also have the same dissociation energy. They are two different bo...

Emilee Hosking 1D

I think the reason for this is the way that the electrons are distributed within the elements. The hydrogens have a more polar bond, so their electrons are distributed in a way that causes their bond to be stronger, whereas the ion-dipole bond has a greater distance between their electrons so their ...

Emilee Hosking 1D

I believe that if there are multiple lewis structures that have an overall charge of 0, then it would just be a resonance right?

Emilee Hosking 1D

Why would the central charge be different from the overall charge of the molecule? I'm having a difficult time understanding this concept

Emilee Hosking 1D

Wait so periods 1 and 2 can both have more electrons than an octet? If so, are there any in the first 2 periods that can only reach an octet?

Emilee Hosking 1D

What are some examples of resonance structures? Do they only occur in bonds between certain molecules?

Emilee Hosking 1D

So for problem 2B3 part d, the diagram in the back shows that there are three bonds between Fluorine and Bromine, but there are also 2 pairs of electrons. Typically aren't there only dots in four pairs or sets of bonds?

Emilee Hosking 1D

In problem 2A21, the ground state electron configuration of Ag+ is 4d^10. Why is this the case rather than it being 4d^9 5s^1?

Emilee Hosking 1D

From what I can tell, the threshold energy is the required energy to release an electron, but the actual energy of the photon can be more or less than the threshold energy. Correct me if I am wrong please.
So if the energy of the photon exceeds the threshold energy, will more electrons be emitted?

Emilee Hosking 1D

I think you would start by using the formula "(hc)/wavelength = change in energy" to find the change in the energy since the wavelength is given to you and h and c are constants. Then you would use Rydberg's formula.

Emilee Hosking 1D

I understand that if an electron's velocity is greater than the speed of light, the problem was either done wrong or it was a trick question, but I am not sure why. Does this have anything to do with balancing energy within the atomic spectra?

Emilee Hosking 1D

What is the equation for the work function and the phi symbol? Is the phi a constant?

Emilee Hosking 1D

In my notes from 10-10-18, I have that "E(photon)=threshold energy +E(kinetic)"
Is threshold energy a constant that I should memorize, or will it be a value that is given in the problem/I will be asked to solve for?

Emilee Hosking 1D

From what I understand, you are saying that a shorter wavelength (higher frequency) will eject electrons even if it is a low intensity photon. But a photon with a higher intensity will emit more electrons than a light source with a lower intensity if their frequencies were equal, correct?

Emilee Hosking 1D

My only previous chem class was my sophomore year so even stoichiometry feels foreign. I had asked few friends who are good at chem about converting grams to moles using stoichiometry, and they have done it a few different ways but got the same answer. Does anyone have any good tips on how to set up...

Emilee Hosking 1D

Aside from having our homework assignment number, name, chapter and text book edition, are there any other things that I should include in the heading of my paper?

Emilee Hosking 1D

For question E21, it states, "Calculate the amount (in moles) and the number of molecules and formula units (or atoms if indicated) in a) 10.0g of alumni, Al[sub]2O[sub]3 b)25.92 mg of hydrogen flouride, HF; c) 1.55mg of hydrogen peroxide, H20; d) 1.25 kg of glucose, C[sub]6H[sub]12O[sub]6; e) ...

CHEMISTRY COMMUNITY

Search found 32 matches

Re: Step Up Session Worksheet (Monday + Friday, Hannah) [ENDORSED]

Re: Identifying the difference

Re: acid rain

Re: Degeneracy

Re: Chelate

Re: Ligands

Re: Chelate

Hybridization Orbitals

Re: d orbital

Re: Figuring out the number of sigma and pi bonds in a molecule

Re: Test 3

Re: HW Q 4.11

Re: 109.5 Degrees

Double Bonds in VSEPR

Dipole Moment

Re: Difference between the bonds

Re: Hydrogen Bonds vs. Ion-Dipole Bonds

Re: Formal charge purpose

Re: Formal Charge of Ions

Re: octet rule exceptions?

Re: Resonance Structures

Re: Dots in Lewis Stucture

Ground State e- Configuration

Re: Threshold energy [ENDORSED]

Re: Rydberg formula

Speed of Light

Re: Work function

Empirical Equation

Re: Photoelectric Effect

Re: Moles!

Homework

Molar Mass: E21