CHEMISTRY COMMUNITY

Aj1156

I get that lewis acids are electron acceptors and lewis bases are electron donors but say you had an ion such as F-

Would F- be a lewis acid or a lewis base? Because it has a full octet id assume lewis base but i’m not sure

Aj1156

How can you tell base when a base is stable?

Aj1156

Does anyone know the strong acids and bases / weak acids and bases we should have memorized? If you could provide a list that’d be awesome

Aj1156

Can someone explain to me what withdrawing electron density is? What exactly does that mean?

I know it has something to do with EN

Aj1156

Do we need to know how to name ions based on their Latin root for naming the compound?

For instance, that Fe (II) and Fe (III) are ferrous and ferric?

Aj1156

For the coordination compound [FeCl(OH2)5]+

What would the charge be of Fe? Can someone please also explain the charge of each atom or molecule?

Aj1156

Is there no worksheet 8 for this weeks workshop?

Aj1156

Is the coordination number equivalent to the number of ligands attached to the central metal atom?

Aj1156

Why does positioning dipoles with oppositely charged closest to each other maximize dipole interactions ?

Aj1156

Can someone walk me through how you would answer this question:

"Identify the types of attractive intermolecular interactions that might arise between molecules of NH2OH"

Aj1156

Is this somewhere in the textbook?

Aj1156

How do you know which intermolecular forces are present in a molecule?

I know that the London forces are present in every molecule, but how do you determine which other forces are present? Is it by the amount of energy in a given molecule?

Aj1156

What are the exceptions to the Octet rule that we need to be aware of?

Aj1156

What do dipole moments tell you about a molecule and what are they used for?

From what I gathered, dipole movements distinguish the type of intermolecular forces between atoms. These intermolecular forces are then used to determine the phase of a molecule.

Is this correct?

Aj1156

When using the VSEPR model, you want to take into account regions of electron density. So if you have 4 atoms surrounding a central atom and one of the atoms has a double bond you would still have 4 regions of electron density, not 5.

Aj1156

Can someone please explain what polar power is? How does it differ between anions and cations?

Aj1156

Could someone give me an overview of what hydrogen bonding is and when it is used? I can't find a section on it in the textbook and I am a bit lost

Aj1156

Thank you again! These are always so helpful. When will you be posting the answer key to worksheet 6?

Aj1156

Why do lone pairs on neighboring atoms weaken the bond between them?

Do lone pairs push the atoms farther apart?

Aj1156

To calculate the difference in electro negativity such as PCl3 would you simply do (electronegativity of P) - (electronegstivity of Cl) or would you do (electronegativity of P) - (3 x electronegstivity of Cl)

Aj1156

polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end.

When a molecule has no dipoles, it is nonpolar. Conversely, when a molecule has dipoles it is polar.

Aj1156

How would you determine the central atom in a molecule such as ONF?

Because oxygen has the lowest ionization energy wouldn’t it be oxygen not nitrogen? Why is the central atom N?

Aj1156

How can you tell when an ion has a lower electron configuration than the neutral atom and vice versa? My question comes up after I did 2A.5 “Give the ground stage electron configuration expected for each of the following ions: Cu+, Bi3+, Ga3+, and TI3+ At first i thought I simply had to write the el...

Aj1156

When would you use the IE, EN, EA, and AR trends?

Aj1156

Why is it that ionization energy increases from left to right? I know it has something to do with more attraction pulling the electrons toward the interior, but I would like a more thorough understanding.

Why does EN energy increase from left to right?

Aj1156

In class Wednesday Dr. Lavelle mentioned that atoms in period 3 or higher have d-orbitals in valence shell that accommodate additional e- and used PCl5 as an example. Can someone explain why and what he meant by this? It kind of went over my head in class.

Aj1156

Does anyone know if Dr. Lavelle will be posting online modules for chapter 2?

Aj1156

For the hydrogen atom which statement is true? A) The transition from n=5 to n=3 involves greater energy than one from n=4 to n=2 B) The transition from n=4 emits radiation of longer wavelength than the transition from n=5 to n=1 C) All transitions from states for which n > 1 to the n=1 involve the ...

Aj1156

How can you tell the difference between ground state and excited state?

Aj1156

Do we need to know how to solve problems asking about the effective nuclear charge? If so, what is Zeffe?

Aj1156

When an atom absorbs a specific wavelength does that mean that an electron moves from a higher energy state to ground state

or is it that when an atom absorbs a specific wavelength they move from ground state to a higher energy state?

Aj1156

32. Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 1015 s-1 before it can emit an electron from its surface. Answer the following two questions. What is the minimum energy needed to produce this effect? Is the wording of this questioning indicate that you need to find the ...

Aj1156

Bohr's frequency condition is delta E=hv, meaning the difference in energy (when a high energy e- drops to a lower energy e- level) is equal to Planck's constant x frequency.

Aj1156

A chemist measured out 8.61 g of copper (II) chloride tetrahydrate CuCl2 4H20 (d) What fraction of the total mass of the sample is due to oxygen? What would be the proper conversion to find the fraction of the mass due to oxygen in the total sample? I tried 8.61g CuCl2 4H20 / 206.45 x 1m/4m x 16g bu...

CHEMISTRY COMMUNITY

Search found 34 matches

Identifying Acids and Bases

Re: Stability of Conjugate Base

Acids & Bases we need to memorize

Withdrawing e- density

Latin prefixes

Naming Question

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]

How to determine coordination number

maximizing dipole interactions

3F.1 (Seventh Edition)

Re: Distinguishing between the different intermolecular forces

Distinguishing between the different intermolecular forces

Exceptions to the Octet Rule

What are dipole moments used for?

Re: Double Bonds in VSEPR

Re: Polar and Dipole

Hydrogen Bonding

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen) [ENDORSED]

Bond Strength

Determining ionic character vs covalent

Re: Dipoles and Molarity

Identifying the central atom in ONF

Ground state

What are the trends useful for?

Trends in EN and IE

d orbitals in valence shell that accommodate additional e-

Online Modules

Atomic Spectra Module 41

Difference between ground and excited state of electrons

Zeffe type of questions

Emission vs Absorption

Photoelectric effect Module 32

Re: Bohr frequency condition

E29 Part D