CHEMISTRY COMMUNITY

Alli Hinmon 3E

See group 13 for amphora compounds we talked about in class.

Alli Hinmon 3E

Make sure you know the Difference!!!
p=mv is for the velocity of a photon, he will usually give you the momentum.

Ke is for Electrons!

Alli Hinmon 3E

Hybrid orbitals are in correspondence to the regions of electron density! if 3 regions = sp2

Alli Hinmon 3E

The wavelength is the distance from one peak of the wave to the other peak, the shorter the wavelength the higher the frequency

Alli Hinmon 3E

It is really important to note that the "acid rain" is just an example of a Acid molecule that can donate more then one H+

Alli Hinmon 3E

Because there is no O present, think of it as simple terms. H attached to an F that is small in radius is going to have a short bond, But CLs radius is bigger so longer bond, more easily broke, more acidic.

Alli Hinmon 3E

HBrO2 I believe is actually stronger because the O will pull the Br away from the H more so then the O will pull the Cl away from the H. Always the more electro neg atom is the strongest acid.

Alli Hinmon 3E

Porphyrin is a tetradentate ligand

Alli Hinmon 3E

It increases because the longer the bond, the weaker the bond, and when it deprotonates, the solution will have the strong acidic solution

Alli Hinmon 3E

What is the difference between Alkali Metal and Alkaline Metal. Strength between acid and bace?? Can you use it in a formula with water?

Alli Hinmon 3E

One thing I got confused on with this is when there is just one lone electron, lets say there is 41 electrons total and every element has an octet, you don't count the lone electron as a region of electron density, I believe you just ignore it, unless I am mistaken.

Alli Hinmon 3E

The way I mentally do these types of problems is process of elimination. First I see if it has AX4, and all the Xs are the same element. Right away I know its non polar. All non polar molecules are induced dipole-dipole. If this is not the case, I always start by looking at the Lewis structure and s...

Alli Hinmon 3E

The way that I mentally do this is in my head add up all the valence electrons, then divide by 8. If the total number of v-electrons is not a factor of 8, there must be Lone pairs. When ever you have 1 pair of lone pairs, the molecule will be polar. Be careful because some lone pairs can surround mo...

Alli Hinmon 3E

The dissociation energy is the energy required to break a bond. The greater the bond strength the greater the dissociation energy must be. This is a way to look at the dissociation E as a positive value. I think of it as going from weak (small value) to a strong (large value) bond. Weak -> big atomi...

Alli Hinmon 3E

Can trigonal bipyramidal be drawn with a lone pair? The VESPR formula is AX5. Lets say that Trigonal Bipyramidal can be drawn with a lone pair, and so it now has a seesaw shape. What about the Square Pyramidal? The VESPR formula is AX5 as well. How do you differentiate weither to draw a Trigonal Bip...

Alli Hinmon 3E

A trigonal planar has 3 bonding regions while trigonal pyramidal has 4. Also if there are 2 pairs of LP electrons they are not necessarily opposite to each other because the 3 surfaces you can put them on are all "neighboring" so when you visualize this, keep this in mind that although the...

Alli Hinmon 3E

Any element in the 3rd period and down can have an expanded octet. Also row 13 has some exceptions to the octet rule. Remember H only can can 1 bond!

Alli Hinmon 3E

F,O,N bond to Hydrogen

Alli Hinmon 3E

Think " Energy is released as you go towards the Nucleus", the change in E is negative. Also Delta E = Ef - Ei so if you are going from N=3 to N=1, Delta E= 1 - 3 = -2

Alli Hinmon 3E

I believe it is as follows:

Never a full Octet:

1. H, He, Li, and B

2. Column 13

Exceeds Octet:

1. all Elements including and after row 3.

Alli Hinmon 3E

I am having trouble with when to use the equation E=hv(frequency) and when to use E=hc/Wavelength I understand that the 1s is used for "electromagnetic radiation" and the second is "photons and light" but in an example it asked for frequency of the lazerpointer and the correct an...

Alli Hinmon 3E

When dealing with Valence electrons, why is it that the d group is before the P group when we write the configuration (ex: 1s2, 2s2, and so on), I want to better understand the different orbitals conceptually.

Alli Hinmon 3E

Ionization Energy is the amount of energy that an isolated atom in a ground state must have in order to discharge an electron! This is seen in our in class notes when we drew the picture of the metal and the equation En - ϕ = Ek where ϕ is the Energy that is needed in order to eject the electron so ...

Alli Hinmon 3E

No they are not the same thing but they are related!
Electron Affinity is the energy released. Electronegativity is the attraction between an atom and a bonding pair of electrons.

Alli Hinmon 3E

I made sure to state the conservation of energy. E (removal of e) + KE = Total energy of the system (Incident Light)

Alli Hinmon 3E

Hello, In Chapter 1A I am having trouble conceptually understanding why it is important for us to memorize the different series's: Lyman Series, Balmer series, and Paschen Series. I understand that what they all have in common is that the lowest energy lever n1 is "common" to the lines wit...

Alli Hinmon 3E

Constructive interference is when the "peaks" and "troughs" line up constructively and the amplitude is enhanced (taller height). Destructive Interference is when the "peaks" coincide with the "troughs" of anther wave, here the amplitude is diminished. We know...

Alli Hinmon 3E

Unfortunately I think we have a lot to memorize from formulas to how to convert units, good luck!

Alli Hinmon 3E

The first video on Audio-Visual Focus-Topics, Assessments & Surveys really helped me with how to calculate empirical and molecular functions!

Alli Hinmon 3E

I counted the number of atoms that make up the molecule.

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Examples

Re: Calculating Velocity

Re: Hybrid Orbitals

Re: wavelength

Re: acid rain formula

Re: Why HF is a weaker acid than HCl

Re: Why HClO2 is a stronger acid than HBrO2?

Re: Ligands

Re: Strength of Acids vs. Number of Oxygens

Alkali vs Alkaline

Re: Regions of Electron Desnity

Re: Types of intramolecular forces

Re: Polar Molecules

Re: Dissociation energy

VESPR Geometric Shapes

Re: Planar vs Pyramidal

Re: Expanded Octet

Re: H-Bonding

Re: Change in Energy

Re: Expanded Octet Atoms

Re: Photoelectric Effect

Re: Valence electrons

Re: electronegativity and ionization energy [ENDORSED]

Re: Periodic Table Trends

Re: Sodium metal surface

Atomic Spectrum: Lines in a Series

Re: Wave Properties of Electrons

Re: Formula Sheet?

Re: Steps to calculating Molecular Formulas

Re: Molecular Formula