CHEMISTRY COMMUNITY

Bella Martin

But then after the first H is removed, is it the same strength as the other compound?

Bella Martin

does the same rule apply if the compound within the brackets is negative, but the outer metal is positive enough to balance it out? would you still use -ate?

Bella Martin

This unfortunately is just one of those that you need to memorize :/

Bella Martin

How do we know when the metal should end in -ate?

Bella Martin

I'm actually not familiar with this every being specifically asked in a homework or sample test question. I'm not sure we got into too much depth on it? Any insight, anyone?

Bella Martin

kind of like in trigonometry where it would list the three vertices that the angle if referring to

Bella Martin

is there a step by step process for figuring out the order of the elements in the formula based on the name? or generally if the brackets are right, could the metal go before or after the ligand?

Bella Martin

and be sure to always count formal charge to make sure you have it right!

Bella Martin

Count the areas of electron density, not electrons

Bella Martin

is CH4 a nonpolar molecule because the vectors of the bonds cancel out? What about CH3+?

Bella Martin

i've also noticed that formal charge is integrated into these questions too, so be familiar with those as well!

Bella Martin

and empty hybridization orbitals allow for pi bonding, right?

Bella Martin

But it wouldn't count as a dipole-dipole interaction, right? or would it?

Bella Martin

Hi! This is kind of embarrassing but this is my second time taking chem 14a. I came to UCLA not knowing what I wanted to do, and I learned quickly that science was not my passion. Although I'm now happily a north campus major, I wanted to improve my GPA and retaking chem was what I needed to do, so ...

Bella Martin

is there a list of compounds that also are an acid/base just like water? or are you able to recognize it by looking at it?

Bella Martin

Are there other elements like Na+ that also do not affect pH?

Bella Martin

I get all mixed up between the bronsted and lewis definitions of acids and bases, will the question be sure to specify which definition we're talking about?

Bella Martin

does the number of hydrogens impact the strength of an acid? does it need to go thru multiple neutralizations to be able to get rid of all the hydrogens and thereby make it weaker?

Bella Martin

405021651 wrote:does a bigger radius mean a stronger acid or is it the other way around??

I would think so because it would be easier to break the bond of a larger atom since the electrons are able to get farther from the nucleus

Bella Martin

How does all of this factor into the size of the element?

Bella Martin

What kind of bonding happens to nonpolar molecules? aside from LDF

Bella Martin

I think of boiling points as increasing the energy to break down a bond. So say you're cooking something, you'd have to turn the heat up to provide more energy in order to break up a strongly bonded molecule.

Bella Martin

So if we're given a CH4 atom and are asked to list the bonding that could occur with a molecule of the same type, what would we say? since its nonpolar, what would the other bondings be besides london dispersion?

Bella Martin

the way i think of it is as a vector, so look at the molecule that has its bonds pointing in the same direction, those are the best for bonding.

Bella Martin

to what extent do you think we need to be familiar with edta for a final? It seems like a really tricky compound to incorporate into a question and i dont think we've had a lot of practice with it?

Bella Martin

Yes! I was scared by the shape of such a large molecule too but by counting the areas of electron density aka binding sites is how you figure out the shape.

Bella Martin

Would the same go for HF? Different sides of the spectrum? Or HAt?

Bella Martin

From my understanding, the larger the atom, the less electronegative it is because the electrons are farther away from the attractive force of the positive nucleus. Therefor, the nucleus isn't able to pull new electrons in with as much force as, say, Fluorine.

Bella Martin

So if there were to be a limit to the amount of times an element with a d-orbital could bind, would it be 5 additional bondings on top of the octet because 10 total electrons are in the d orbital state?

Bella Martin

Just count the areas of electron density, even if its a double bond! Same deal with hybridization

Bella Martin

I always get weary when I see a metal with the ability to bind with so many anions too, but in today's review session the UA was saying that they can have a roman as large as 6 sometimes and its just right! It really depends on what its binding with that makes it work.

Bella Martin

the molecule will always be bent! if you think about water, H2O, with that same configuration, the two lone pairs sit next to each other always and create that bent shape. Additionally, I think its a general rule that the lone pairs gravitate to the same plane, if im not mistaken.

Bella Martin

If we think about water, H2O, the Hydrogen doesn't have any lone pairs but is still able to create hydrogen bonding with another H2O molecule by way of the lone pairs on the oxygen atom. So both!

Bella Martin

Hi,
I'm having trouble with question 37, could someone explain the general rule for figuring out coordination numbers to compounds that are a bit difficult to write lewis structures for?

Bella Martin

Hello! In reference to the 6th edition textbook question 33.b. about CO3 2-. I understand that the shape is trigonal planar but I am confused as to why it can only serve as a mono or bidentate ligand. Two of the oxygens have 3 lone pairs and the third oxygen has 2 lone pairs, so I don't understand w...

Bella Martin

Hello! I'm having a bit of trouble with part D of this problem. The question states that n = 3, l = 2, and ml = +1. So from that, you are able to determine that it is the 3d orbital and ml is +1. I drew out a diagram with the different electrons in -2, -1, 0, +1, +2 sections, with up and down arrows...

Bella Martin

I have lots of Chemistry jokes, I'm just not sure all of them will get a good reaction

Bella Martin

As we know, for example, the 2sp hybrid's energy will fall in between the energy of the 2s and the 2p's energy level. However, I dont understand why this is significant in terms of electrons being spin paired vs. being dispersed amongst the electron orbitals. What was stated during lecture was, &quo...

Bella Martin

In the course reader it says: "remember lone pairs do influence molecular shape, but only atom positions are used to name the shape". If this is true, why do we have an entirely different name for a molecule who has 3 attached atoms (trigonal planar) vs. a molecules with 3 attached atoms +...

Bella Martin

Hey Chemistry Community, I'm pretty terrible at understanding formal charge and I became more confused while going through the bruincast lecture of the different shapes of molecules and CO3 ^-2 (negative 2 overall charge). So I understand that one of the O creates a double bond with the C. The forma...

Bella Martin

What type of bond is the tastiest? a Pi bond!

Bella Martin

On my quiz i had a question about the resonance structure of IF7, I'm sure i got this one wrong. Would someone please walk me through their thought process for what the actual formation of the Lewis structure looked like? For example, did all of the F atoms stem from the I atom, or were there in a g...

Bella Martin

As we know, for the p sub-shell we use the notation -1, 0, 1 for orbitals px, py, and pz. What is the correct notation for the d sub-shell's dyx, dxy, dzy, dz^2 and dx^2y^2?

Bella Martin

Why is it that the mass of electrons are calculated with the SI unit of grams, while other equations require the use of kilograms as their SI unit? These other equations include the Broglie's equation and the indeterminacy equation, where momentum includes the mass, but in kilograms.

Bella Martin

This was very helpful! Thank you

Bella Martin

In the post assessment for the photoelectric effect, this question was asked: To interpret the results of photoelectric experiments the model of light needs to change from a ________ model to a ________ model. What are the two missing words? the first blank is wave and the second blank is either par...

Bella Martin

It is clear that my chemistry grade is suffering because I have not been studying....periodically. :)

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