CHEMISTRY COMMUNITY

danicatran4

I believe not all amphoteric compounds are amphiprotic because as they're acting as both an acid and a base, it could involve the electron transfer instead of the hydrogen transfer.

danicatran4

I have an example problem I'm not sure what it's asking exactly or how to solve:

Identify the hybrid orbital used by the atom (bolded and underlined) in the molecule CH₃CCCH₃ (second carbon)

danicatran4

If a molecule is bent, wouldn't the angle be slightly less than 120 or 109.5 degrees since there would be a stronger repulsion by the lone pair of electrons?

danicatran4

When are we supposed to use the mono prefix? Is it just if the first ligand in alphabetical order is singular? Will we get marked incorrect if we always include the prefix?

danicatran4

For Gail's review session she recommended that we do know both just in case. The chemical formula of EN is C2H8N2. The chemical formula of EDTA is C10H16N2O8. I think I was told to memorize them how they are on the Ligand Names in Coordination Compounds chart on Lavelle's website. Ethylenediamine h...

danicatran4

Is there any instance that you would you "chlorine" when naming or just "chloride"? What's the explanation behind using either?

danicatran4

In problems where one molecule has stronger dipole-dipole forces while the other molecule has stronger London dispersion forces, why would the molecule with stronger London dispersion forces have a higher melting point? Isn't dipole-dipole stronger than LDF in terms of intermolecular forces?

danicatran4

There was a lone pair hybridization problem on one on the review worksheets from a UA. It was a lone pair on the nitrogen and the hybridization was sp. Are the lone pair of electrons on an atom always going to be hybridized?

danicatran4

J.11 (6th edition) asks to identify the acid and bases in the chemical reactions given. Part C gives the reaction: 2 HI + CaO --> CaI 2 + H 2 O. I don't understand how HI is the acid and CaO is the base. Is this something we're supposed to memorize or is there a way to tell which direction the proto...

danicatran4

I'm confused about 17.33 (6th edition) on the homework which asks which ligands can be polydentate. Part B gives the molecule CO₃^2-. Why is the answer that it can bind through either one or two oxygen atoms? Why isn't the answer definite? Why can't it bind to all three oxygens?

danicatran4

Does delocalization have anything to do with hybridization? Like does in happen in conjunction with only pi bonds?

danicatran4

Will we ever have to determine if a compound is a Bronsted acid or Lewis acid on a test? If so, how would you determine if an electron or proton is being moved?

danicatran4

Vicky Lu 1L wrote:Di-, tri-, and tetra- should be used for multiple monodentate ligands while bis-, tris-, tetrakis- would be used for for multiple polydentate ligands.

What is a monodentate ligand and what's a polydentate ligand? I don't understand the difference.

danicatran4

Do we need to know all of this sheet, like both the name column and the New IUPAC Name Convention? Also, when writing ethylenediamine and diethylenediamine do we need to write all of it out or can we just use (en) and (dien)?

danicatran4

SophiaKohlhoff4B wrote:It is important to draw the resonance for a molecule because it demonstrates that the actual bond lengths are the average of the bond lengths.

Do we need to include something to show the bond lengths are an average and the same or is that implied when we draw the resonance structures?

danicatran4

Are we going to be given an electronegative chart on the test?

danicatran4

Will there be sessions week eight before Thanksgiving break?

danicatran4

I believe that it's the other way around, because the rod-shaped bonds are stronger, the boiling point is higher. However, I don't understand why a rod-shaped structure would have stronger bonds.

danicatran4

I have the sixth edition textbook so I don't think the problem coresponds, but I believe if you are given a molecule, you first would decide the struture - tetrahedral - which would then tell you the angles are 109.5 degrees.

danicatran4

From Friday's lecture, what does "hydrogen bonds are most electrostatic in nature mean"?

danicatran4

In nature, you would see a resonance hybrid- a blending of the different lewis resonance structures. This is representative of the different places electrons can be.

danicatran4

Put the radical on whatever atom will give it the last formal charge (attempt to get the molecule stable as possible).

danicatran4

How will you know if boron (or any other element) will be satisfied with an incomplete octet (BF₃) or want a complete octet (BF₄-)?

danicatran4

Electronegativity is the tendency of an atom to attract electrons, while electron affinity is the amount of energy released when an electron is added to a neutral atom. They have the same trend (increase as you go across and decrease as you go down the periodic table).

danicatran4

But in what instance would 3d (or any d orbital) have a lower energy than s? Is it all the time?

danicatran4

Are expanded valence shells any atoms with a d block?

danicatran4

What are the consequences of shielding? I understand it means the electrons far away from the nucleus are less electronegative, but why does it matter?

danicatran4

Is the Rydberg equation the one Dr. Lavelle said in lecture not to use? What do we use instead?

danicatran4

Can you explain how the uncertainty principle is applied to real life situations? In a session today, we did an example that asked for the minimum indeterminacy of a bowling ball's position and if you coulf blame Heisenberg's Uncertainty Principle when you miss the pins and I don't really see how it...

danicatran4

What effect does quantized energy have on chemistry? What difference does it make in the class/homework problems?

danicatran4

So a car would not have any measurable wavelike properties simply due to its large mass? What quota would an object need to fufill to be considered too large to have measurable wasvelike properties or not?

danicatran4

In the last problem during lecture, the answer to the question "Could the calculated wavelength be experimentally verified or detected in a lab?" was yes. How did we reach that conclusion? In future problems how will I know if the answer should be yes or no?

danicatran4

Adding onto the question above. I understand how the answer would come out but using the SI measurements, would it be incorrect to leave the answer in meters and not kilometers. And if it would be incorrect could someone explain to me why that would be the case? I have the same question. Wouldn't y...

danicatran4

Do you guys know when our first test is? In the website, there is a tab that says "Test and Exam Schedule" but the first test will be on October 9 in your discussion section. ^Does anyone know if there is going to be a review for the test? I'm not sure what you're asking for about review....

danicatran4

From what I understand, the homework assignment is always going to be 7 problems from the list of your choosing as long as they are topics we've recently covered.

CHEMISTRY COMMUNITY

Search found 35 matches

Re: Amphiprotic vs. Amphoteric

Hybrid Orbitals

Re: Bond Angles

mono- prefix

Re: Final Exam

Re: Chloro v/s chlorido

Re: London Dispersion Forces vs Dipole Dipole

Re: lone pairs of e-

Re: Memorizing Acid and Bases

Re: Ligands

Re: Delocalization

Re: Bronsted v Lewis

Re: Prefix bis, tris, tetrakis, etc. [ENDORSED]

Ligand Names In Coordination Compounds

Re: Drawing resonance

Re: Question about what makes something ionic

Re: Workshops

Re: High Boiling Points and Bond Strengths [ENDORSED]

Re: Bond angles

Re: Hydrogen Bonds

Re: Resonance Structures

Re: Radicals

Re: Incomplete Octet

Re: Electronegativity vs Electron Affinity

Re: Electron Configuration

Re: Expanded Valence Shells

Re: Shielding [ENDORSED]

Re: Rydberg Equation

Re: Representation

Re: Energy Q

Re: Particle wave duality

Wavelength Verification in Lab

Re: Homework: E1, 6th Ed.

Re: How does grading for discussion posts work?

Re: Where to find assignments