CHEMISTRY COMMUNITY

AnthonyDis1A

I think double bonds are considered as one total ligand attachment.

AnthonyDis1A

When determining the charge of the central atom, I think you have to consider the ligands as separate molecules. For the CN ligand, you would have to draw its Lewis structure under the assumption that it was not bonded with Fe, and that it had a full octet. So you would get CN-.

AnthonyDis1A

There are some ligands that are common polyatomic ions, like oxalate (C2O4)2-. Some of the textbook problems use these repeatedly, so memorizing some ions could save time.

AnthonyDis1A

What part of the chapter was this topic in?

AnthonyDis1A

As mentioned in the previous post, some molecules like the trigonal bipyramidal shape have multiple intersecting planes of bonded atoms. In the horizontal plane of the trigonal bipyramidal shape, the bond angles are larger, and so I think the lone pair would probably cause less repulsion if placed b...

AnthonyDis1A

For atoms, I know we can just say sp hybridized, sp2 hybridized, etc. I guess for molecules the textbook notation should be followed, but I don't remember that in the lecture (not that it might not have been covered in lecture).

AnthonyDis1A

Sigma bonds allow more flexibility for molecules to change shape. Pi bonds make molecules more rigid.

AnthonyDis1A

For me, it also helped to know the amount of lone pairs/bonding atoms that each shape had. For example, the seesaw shape has 4 bonded atoms and 1 lone pair on the central atom, for a total of 5 atoms total in the molecule.

AnthonyDis1A

Molecules can be in the same VSEPR category. That would mean that their bonding domains/lone pairs would shape the angles between bonds the same way. For example, CH4 and and SO4 (2-) both have tetrahedral molecular geometry.

AnthonyDis1A

Polar molecules can be covalent as well. All that is needed to get polarity is/are more electronegative atom(s) pulling electrons to one region of a molecule. This is also shown by the dipole arrows on a diagram pointing in the same direction.

AnthonyDis1A

Molecular structures with greater surface area tend to have higher melting points.

AnthonyDis1A

I don't think electron shielding and bond length are closely related.

AnthonyDis1A

I think most, if not all the time, aluminum ions have a 3+ charge.

AnthonyDis1A

I thought this site explains the relationship between resonance structures and formal charges well. It also goes really in-depth with well-explained examples.

https://chem.libretexts.org/Core/Physic ... /Resonance

AnthonyDis1A

Also, I think that the group where an element is located plays a role in its bonding. So to reinforce the previous post, Cl usually tries to gain one more electron to get a full octet because it is a halogen (Group 7).

AnthonyDis1A

I think it just means that the s-orbitals are closer to the nucleus. There is a greater density of s-orbital electrons near the nucleus than that of other subshells.

AnthonyDis1A

The uncertainty of larger objects is harder to determine because they are easier to observe. Knowing how fast a car is going doesn't affect our knowledge of where it is located, because cars are much bigger than atoms, and are therefore easier to observe.

AnthonyDis1A

For atoms with an atomic number greater than 20, the 4s state is higher in energy than that of 3d, which is why the d subshells are written before the s subshells for those e- configurations. Just looking at the configurations, the 4s and 4p subshells are the two "written last" of the Grou...

AnthonyDis1A

I think that each plane shows the path with the highest probability of (specifically) the two electrons in that particular orbital.

AnthonyDis1A

Does an electron's energy increase when it moves from subshell to subshell?

AnthonyDis1A

What does "minimum uncertainty" mean conceptually? Mathematically it's the minimum product of a particle's position and momentum, but what's the point in knowing an electron's minimum uncertainty?

AnthonyDis1A

Being more precise and using more decimal places got me a percent difference closer to 0, but it's probably negligible since proton and neutron masses are already pretty close in value.

AnthonyDis1A

"Constructive" and "destructive" describe wave properties in the context of wave interference. They are used in a specific instance.

AnthonyDis1A

The equation can also be used to find E(photon) in the photoelectric effect equation.

AnthonyDis1A

Light can be both a wave and a stream of particles (photons). It travels as a wave, but when participating in chemical reactions (i.e. being absorbed or emitted by elements), transfer energy in distinct quantities/particles. The photoelectric effect is one of those example chemical reactions.

AnthonyDis1A

The textbook table is technically correct since the energy potential of both waves have a lot of overlap. However, one can differentiate the two conceptually: gamma rays are nuclear in origin, whereas X-rays have an electronic source. I guess the solution ranked gamma radiation as higher in energy t...

AnthonyDis1A

The variables of the light equations represent the aspects of light that contribute to its energy, which is emitted or absorbed in discrete units. In other words, this energy can be quantified. Branching off this fact, it is also true that the intensity of light is proportional to its number of phot...

AnthonyDis1A

I think that if you get a weird decimal by the time you start dividing by the smallest mole amount, it's likely that the calculations before that are incorrect. There were a few problems where I tried rounding up .7 and .8, and got really strange numbers for my answers. My work before that point was...

AnthonyDis1A

I think CuSO4 * 5H2O means that for every CuSO4 molecule, there are 5 H2O molecules attached. The 5 H2O molecules are seen as already in the solution, and all the * 5H2O represents is that the CuSO4 is hydrated. Therefore, the * 5H2O only affects the molar mass of the hydrated CuSO4 molecule, and no...

AnthonyDis1A

In a solution, does the solute need to be completely dissolved in the water for the solution to be considered aqueous?

CHEMISTRY COMMUNITY

Search found 30 matches

Re: coordination number=polydentate number?

Re: 17.29

Re: Charge of ligands

Re: Amplitude and Hybridization

Re: Lone Pair Placement [ENDORSED]

Re: Hybridization Notation

Re: Types of Bonds

Re: AXE Notation and Shape

Re: VSEPR

Re: Polarization

Re: Pentane vs. 2,2 Dimethylpropane

Re: Bonds

Re: 3.25 part c

Re: Resonance Structures and Formal charges

Re: Oxidation Number & Bonds

Re: 2.37

Re: Everyday Objects and heisenberg's equation [ENDORSED]

Re: Homework 2.55

Re: understanding orbitals [ENDORSED]

HW Problem 2.2 [ENDORSED]

Re: Change in momentum

Re: HW 1.37 [ENDORSED]

Re: Diffraction meaning

Re: einstein equation and other equations [ENDORSED]

Re: Light is a wave and a particle?

Re: HW 1.5 [ENDORSED]

Re: key concept 4/11/18

Re: Rounding molar ratios

Re: G.16 Part C

HW G.7