CHEMISTRY COMMUNITY

Tara Foroohar 3K

Hey guys! Do u have any last minute suggestions on things we should have memorized, besides coordination compounds and strong acids and bases?

Tara Foroohar 3K

Hi guys! If the pKa is high, it means the Ka is low and it is a weak acid. Are pKa values similar to pH values in the sense that a value over 7 is basic? Because then a pKa of 10 for example would suggest that the solution is basic even though an acid was used?

Tara Foroohar 3K

Hey guys! In class today Dr. Lavelle said not to worry about the pH of polyprotic acids, but the syllabus says we will be covering sections 12.1-12.14. Should we still read 12.14, which is the polyprotic acid section, and at least understand the concepts? Or will if not be covered at all?

Tara Foroohar 3K

Hey guys! For question 17.33 a the answer key says that the nitrogen atoms each have a lone pair used for bonding, making it tridentate. How would u draw the Lewis structure of this molecule in order to figure out the lone pairs?

Tara Foroohar 3K

Hey! Does anyone know if Dr. Lavelle's class is bruincasted because I would like to review his lecture on naming compounds, and where to find it if it is. Thank you!

Tara Foroohar 3K

Hi guys! on page 115 in the book and in figure 4.6 it shows an octahedral arrangement having the two sets of lone pairs being axial pairs, but wouldn't the lone pairs have repulsions with the same number of atoms if they were equatorial lone pairs? what is the reason that they are on the axis?

Tara Foroohar 3K

Hi guys! Will there ever be a scenario in which the molecule is symmetrical but polar? Or are all symmetrical molecules nonpolar

Tara Foroohar 3K

Hey guys! Overall, why does hybridization occur? Does it create a more stable molecule?

Tara Foroohar 3K

Hi! do you guys know if we will need to know how to draw d orbitals and know their shapes in any scenarios? because I know we do for s and p orbitals

Tara Foroohar 3K

Hi! Does anyone know the distinct reason that lone pairs have a higher repulsion and push other electrons away when it comes to molecular shape?

Tara Foroohar 3K

Hey guys! When doing Heisenberg's is the uncertainty in position measured in radius or diameter???

Tara Foroohar 3K

Hi! When creating Lewis structures, how are u just to know whether or not the structure has a radical/biracial? Will it be designated in the name with the dot?

Tara Foroohar 3K

Also, the 3s and the 3p orbitals can only accommodate sharing 4 electrons (1 in the s orbital, 3 each in the p orbitals) so the 5th electron that needs to be shared goes into the d orbital

Tara Foroohar 3K

It's done by energy level because that's the order in which the electrons fill the orbitals. They go up the energy levels instead of jumping up and down them to get to the same orbitals

Tara Foroohar 3K

Also, if you Google the metalloid staircase, there's a distinct pattern in the table with the metalloids being on this staircase and nonmetals tot eh right of r and metals to the left.

Tara Foroohar 3K

Hey guys! So in class, Dr. Lavelle mentioned that labeling an electron configuration as, for example, 2px^1 2py^2 2pz^3, is the same thing as 2p^3 that most of us are familiar with from high school. Do you know if we have to write it out in the first format for exams, etc?

Tara Foroohar 3K

^^so,

frq = [(150.6 kJ/mol) + .5(9.11x10^-31 kg)(6.61x10^5 m/s)^2] / (6.6.26x10^-34 J.s)

Tara Foroohar 3K

The electron won't jump the energy level if it's not given the exact amount of energy needed. So it would need exactly 2 joules to go from n1 to n2 and if it's given 2.5 joules it just won't change energy levels.

Tara Foroohar 3K

Hi! I was just wondering what the difference between the two series are (Balmer and Lyman) and how to know which to use at what time. Do they only work for hydrogen?

Tara Foroohar 3K

Is there anyway to do this problem without using the logarithms method in the solutions manual?

CHEMISTRY COMMUNITY

Search found 20 matches

Memorizing

High pKa

Section 12.14

17.33 (a)

Bruincast

AX4E2 lone pairs

Symmetrical Molecules

Hybridization

D orbital

Lone Pairs

Uncertainty in position

Designating radicals [ENDORSED]

Re: The expanded octet in PCl5

Re: Confusion regarded e- configuration

Re: Metals, Nonmetals, and Semimetals/Metalloids

Px, Py, Pz

Re: Photoelectric Effect Post-module Question

Re: Excess Energy [ENDORSED]

Lyman and Blamer series [ENDORSED]

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