Search found 32 matches
- Thu Dec 06, 2018 10:08 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: How to tell if something is a chelate
- Replies: 6
- Views: 618
Re: How to tell if something is a chelate
When a ligand is bound in two places it forms a ring-like structure.
- Thu Dec 06, 2018 10:06 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: CO3^2-
- Replies: 2
- Views: 318
Re: CO3^2-
In one of the review sessions they said that typically if the two lone pairs, one from one atom of the same compound and another from the other, are about 90 degrees from each other than it's able to be bidentate. Because most coordination compounds turn out to be octahedral, they have 90 degree bon...
- Thu Dec 06, 2018 9:49 pm
- Forum: Naming
- Topic: Naming with bis-
- Replies: 5
- Views: 567
Re: Naming with bis-
Yeah, you would write bis- because there is already a di- in the ligand itself, just like Sydney said. My TA also extended on the reason we have to do that. Writing bis- allows you to know that there is two ethylenediamines rather than two ethylens with two amines because that is not the case since ...
- Thu Nov 29, 2018 6:32 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Oxidation number
- Replies: 9
- Views: 861
Re: Oxidation number
Also, the way I think about it is that the metal's oxidation number must cancel out with what it's bonded to. And when that's bonded to more molecules it all has to equal to the charge that's given usually on the outside of the brackets. You usually know (or they are given) the charge for the other ...
- Thu Nov 29, 2018 6:20 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Chelate
- Replies: 6
- Views: 616
Re: Chelate
Also, I read somewhere that if a coordination compound contains at least one non-monodentate ligand, its considered a chelates. So I guess in a way its any coordination compound with a ligand, I think. And it also says that chelates are typically organic and an example of a chelate is the porphyrin ...
- Thu Nov 29, 2018 6:08 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate Ligands for resonance structures
- Replies: 1
- Views: 250
Re: Polydentate Ligands for resonance structures
Because of the negative 2 charge two of the Oxygen atoms have an extra lone pair of electrons so only those atoms want to bind to another atom. When one bonds it will be monodentate and when both Oxygen atoms bond to a different atom it will be bidentate.
- Tue Nov 20, 2018 10:40 pm
- Forum: Sigma & Pi Bonds
- Topic: Pi Bond
- Replies: 1
- Views: 242
Re: Pi Bond
I think it might be in the "electron cloud," or the valence shells of both the atoms that are bonded together.
- Tue Nov 20, 2018 10:37 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Hybrid vs. Molecular Orbitals
- Replies: 3
- Views: 2585
Re: Hybrid vs. Molecular Orbitals
So how would you actually form a molecular orbital? Like with what orbital, the atomic or hybrid of an atom with another? Can you please give an example of a molecular orbital, I don't understand how that would look like, or come to be?
- Tue Nov 20, 2018 10:22 pm
- Forum: Hybridization
- Topic: Deficient Octets
- Replies: 2
- Views: 282
Re: Deficient Octets
Also, to add on in terms of when you look at the atomic orbital, Boron for example has 2s full and 2p with only one electron. So, when you separate the electrons individually to make the hybrid when wanting to make a bond with three other atoms there are three spots to bond. The hybridization will b...
- Tue Nov 20, 2018 10:13 pm
- Forum: Hybridization
- Topic: Deficient Octets
- Replies: 2
- Views: 282
Re: Deficient Octets
You are able to also tell what the hybridization is based on how many regions of electron density there are so you can look at it that way, if Al or B have two regions of electron density the hybridization will be sp and if they have three then it will be sp^2. I think that how high it will go for t...
- Wed Nov 14, 2018 6:37 pm
- Forum: Dipole Moments
- Topic: How do you draw dipole moments
- Replies: 6
- Views: 1037
Re: How do you draw dipole moments
You can think of it like the atom with a slightly negative has an arrow close by it that starts from the atom with the slightly positive charge which has a positive sign close by it. The line on that side looks like a positive sign.
- Wed Nov 14, 2018 5:54 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizing power
- Replies: 2
- Views: 325
polarizing power
Does polarizing power only apply to cations? Can anions also have polarizing power and if they can, what would be the pattern? For cations its typically the smallest has more polarizing power, but how about for anions?
- Wed Nov 14, 2018 5:51 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Polarizability
- Replies: 4
- Views: 480
Polarizability
Does polarizability only refer to Anions? Will there ever be a question that asks for the polarizability for a cation?
- Sat Nov 10, 2018 12:40 pm
- Forum: Dipole Moments
- Topic: induced-dipole
- Replies: 2
- Views: 360
induced-dipole
Is an induced-dipole interaction equivalent in strength as a dipole-dipole interaction? I think it is because technically it's still a dipole-dipole interaction but would it be a little weaker since it's induced?
- Sat Nov 10, 2018 12:25 am
- Forum: Dipole Moments
- Topic: Fluctuation
- Replies: 3
- Views: 390
Fluctuation
I don't completely understand the fluctuating concept. I know that in order to attract each other one side of the atom becomes slightly negative by the electrons and another atom becomes slightly positive, but why is it called fluctuation? Do electrons keep moving around making the bonded side of th...
- Sat Nov 10, 2018 12:06 am
- Forum: Lewis Structures
- Topic: Molecular shape and structure
- Replies: 5
- Views: 601
Molecular shape and structure
When we draw the lewis structure for molecules that have 4 or more atoms do we have to show the 3D shape by putting a small triangle and the lines to show that one atom is behind or in front of the central atom?
- Thu Nov 01, 2018 11:51 pm
- Forum: Electronegativity
- Topic: What are the trends useful for?
- Replies: 12
- Views: 1018
Re: What are the trends useful for?
You can use the atomic radius to determine how strong the bonds will be between two atoms that bond together. If there is a bigger radius between two atoms that are bonded together and you compare the strength of the bond to another two bonded together, you can tell which will be stronger, and stay ...
- Thu Nov 01, 2018 11:43 pm
- Forum: Resonance Structures
- Topic: Double Bonds and Single Bonds in Resonance Structures
- Replies: 3
- Views: 388
Re: Double Bonds and Single Bonds in Resonance Structures
I agree with Albert, since it becomes a hybrid, the bond lengths would all average out and so maybe that's why they are all the same.
- Thu Nov 01, 2018 11:38 pm
- Forum: Resonance Structures
- Topic: Electron movements
- Replies: 2
- Views: 318
Re: Electron movements
If I understand your question correctly, I think that we can not be sure of the exact position of the electrons because of the resonance structures. the "blended characteristic" that your referring to is just the resonance hybrid.
- Wed Oct 24, 2018 10:06 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: #28 Atomic Spectroscopy Post-Assessment for module
- Replies: 1
- Views: 244
#28 Atomic Spectroscopy Post-Assessment for module
The problem is: The meter was defined in 1963 as 1650763.73 wavelengths of radiation emitted by krypton-86. What is the wavelength of this krypton-86 radiation?To what region of the electromagnetic spectrum does this wavelength correspond? what energy does one photon of this radiation have? I did no...
- Wed Oct 24, 2018 9:46 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Post Module Assessment #42
- Replies: 2
- Views: 333
Re: Post Module Assessment #42
Once you find the energy, you set that equal to -hR/4^2 - (-hR/n^2), which can be written as -hR(1/16 - 1/n^2). Next you divide -hR on both sides and then subtract 1/16. After, divide by the negative and flip the whole equation so it is 1 over whatever is on the other side and just n^2 on the right ...
- Wed Oct 24, 2018 8:59 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Degeneracy
- Replies: 7
- Views: 3345
Re: Degeneracy
Oh okay, so if is asking the degeneracy for 3s it would be 3 too? And if it was asking for 4p it would be 4?
- Wed Oct 24, 2018 7:17 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Degeneracy
- Replies: 7
- Views: 3345
Degeneracy
I don't understand what degeneracy means and how we determine the degeneracy of a certain orbital, like 3p. How would you determine that?
- Wed Oct 17, 2018 11:00 pm
- Forum: Trends in The Periodic Table
- Topic: Aufbau Principle and Hund's Rule
- Replies: 1
- Views: 204
Aufbau Principle and Hund's Rule
What's an easier way to understand the difference between the Aufbau Principle and Hund's Rule? Can someone please explain them too?
- Wed Oct 17, 2018 10:47 pm
- Forum: Trends in The Periodic Table
- Topic: atomic orbitals
- Replies: 2
- Views: 283
atomic orbitals
How do you describe the interpretation of atomic orbitals in terms of probability?
- Wed Oct 17, 2018 10:45 pm
- Forum: Properties of Electrons
- Topic: electrons
- Replies: 3
- Views: 253
electrons
What are the factors affecting the energy of an electron in a many-electron atom?
- Thu Oct 11, 2018 11:10 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty Principle
- Replies: 5
- Views: 463
Uncertainty Principle
What does the uncertainty principle actually calculate?
- Thu Oct 11, 2018 11:04 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: H-Atom
- Replies: 1
- Views: 172
H-Atom
What does it mean when they say that the energies on the right of an expression have to be proportional to hR/n2, to have accounted for Rydberg’s formula?
- Thu Oct 11, 2018 11:00 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Bohr frequency condition
- Replies: 2
- Views: 2753
Bohr frequency condition
HI, can someone explain the Bohr frequency condition to me please. I don't fully understand how the textbook explains it?
- Wed Oct 03, 2018 10:47 pm
- Forum: Empirical & Molecular Formulas
- Topic: Definition of Empirical Formula
- Replies: 8
- Views: 659
Re: Definition of Empirical Formula
The empirical formula represents the relative number of atoms.
- Wed Oct 03, 2018 10:43 pm
- Forum: Balancing Chemical Reactions
- Topic: Order of balancing an equation
- Replies: 8
- Views: 682
Re: Order of balancing an equation
The element which occurs the least is the one that you balance first.
- Wed Oct 03, 2018 10:40 pm
- Forum: Limiting Reactant Calculations
- Topic: Fundamental M.9 [ENDORSED]
- Replies: 3
- Views: 382
Re: Fundamental M.9 [ENDORSED]
I believe that first you can write the soluble ionic compounds as dissociated ions to get the complete ionic equation but you still have leave out the spectator ions (the ones that stay the same in the reactant and product side) from the equation since they do not change.