Search found 47 matches

by Bella Martin
Wed Jul 31, 2019 9:24 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of Acids vs. Number of Oxygens
Replies: 6
Views: 401

Re: Strength of Acids vs. Number of Oxygens

But then after the first H is removed, is it the same strength as the other compound?
by Bella Martin
Wed Jul 31, 2019 9:21 am
Forum: Naming
Topic: 9C.1 part c
Replies: 4
Views: 314

Re: 9C.1 part c

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?
by Bella Martin
Wed Jul 31, 2019 9:20 am
Forum: Naming
Topic: CN Charge
Replies: 4
Views: 152

Re: CN Charge

This unfortunately is just one of those that you need to memorize :/
by Bella Martin
Wed Jul 31, 2019 9:18 am
Forum: Naming
Topic: Naming/Coord Comp
Replies: 2
Views: 93

Re: Naming/Coord Comp

How do we know when the metal should end in -ate?
by Bella Martin
Tue Jul 30, 2019 11:21 pm
Forum: Conjugate Acids & Bases
Topic: Delocalization of charge and stability
Replies: 2
Views: 196

Re: Delocalization of charge and stability

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?
by Bella Martin
Tue Jul 30, 2019 11:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: definition
Replies: 2
Views: 202

Re: definition

kind of like in trigonometry where it would list the three vertices that the angle if referring to
by Bella Martin
Tue Jul 30, 2019 11:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Formula from Name
Replies: 4
Views: 117

Re: Formula from Name

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?
by Bella Martin
Tue Jul 30, 2019 11:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: how to draw lewis structure
Replies: 4
Views: 184

Re: how to draw lewis structure

and be sure to always count formal charge to make sure you have it right!
by Bella Martin
Tue Jul 30, 2019 11:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Hybridization
Replies: 2
Views: 133

Re: Hybridization

Count the areas of electron density, not electrons
by Bella Martin
Tue Jul 30, 2019 11:01 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar v. Nonpolar
Replies: 5
Views: 154

Re: Polar v. Nonpolar

is CH4 a nonpolar molecule because the vectors of the bonds cancel out? What about CH3+?
by Bella Martin
Tue Jul 30, 2019 11:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Final Material
Replies: 2
Views: 107

Re: Final Material

i've also noticed that formal charge is integrated into these questions too, so be familiar with those as well!
by Bella Martin
Tue Jul 30, 2019 10:56 pm
Forum: Hybridization
Topic: Unhybridized orbitals
Replies: 6
Views: 10396

Re: Unhybridized orbitals

and empty hybridization orbitals allow for pi bonding, right?
by Bella Martin
Tue Jul 30, 2019 10:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 202
Views: 73457

Re: Saying Thank You to Dr. Lavelle

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 ...
by Bella Martin
Tue Jul 30, 2019 10:49 pm
Forum: Conjugate Acids & Bases
Topic: Water as an Acid/Base
Replies: 10
Views: 228

Re: Water as an Acid/Base

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?
by Bella Martin
Tue Jul 30, 2019 10:44 pm
Forum: Lewis Acids & Bases
Topic: Na+
Replies: 3
Views: 227

Re: Na+

Are there other elements like Na+ that also do not affect pH?
by Bella Martin
Tue Jul 30, 2019 10:42 pm
Forum: Lewis Acids & Bases
Topic: Acids & Bases
Replies: 4
Views: 102

Re: Acids & Bases

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?
by Bella Martin
Tue Jul 30, 2019 10:41 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of Acids vs. Number of Oxygens
Replies: 6
Views: 401

Re: Strength of Acids vs. Number of Oxygens

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?
by Bella Martin
Tue Jul 30, 2019 10:37 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Why HF is a weaker acid than HCl
Replies: 12
Views: 367

Re: Why HF is a weaker acid than HCl

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
by Bella Martin
Tue Jul 30, 2019 10:29 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: boiling point
Replies: 5
Views: 182

Re: boiling point

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.
by Bella Martin
Tue Jul 30, 2019 10:27 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hydrogen Bonding
Replies: 5
Views: 177

Re: Hydrogen Bonding

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?
by Bella Martin
Tue Jul 30, 2019 10:22 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: homework 9C7 7th edition
Replies: 2
Views: 107

Re: homework 9C7 7th edition

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.
by Bella Martin
Tue Jul 30, 2019 10:21 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: edta
Replies: 7
Views: 281

Re: edta

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?
by Bella Martin
Tue Jul 30, 2019 10:11 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Shape in coordination compound
Replies: 2
Views: 102

Re: Shape in coordination compound

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.
by Bella Martin
Tue Jul 30, 2019 10:07 pm
Forum: Ionic & Covalent Bonds
Topic: Test 2 problem
Replies: 2
Views: 90

Re: Test 2 problem

Would the same go for HF? Different sides of the spectrum? Or HAt?
by Bella Martin
Tue Jul 30, 2019 10:06 pm
Forum: Dipole Moments
Topic: Effect of size [ENDORSED]
Replies: 7
Views: 280

Re: Effect of size [ENDORSED]

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.
by Bella Martin
Tue Jul 30, 2019 9:59 pm
Forum: Octet Exceptions
Topic: breaking the octet
Replies: 7
Views: 317

Re: breaking the octet

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?
by Bella Martin
Tue Jul 30, 2019 9:53 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate ligands and coordination number/structure
Replies: 1
Views: 85

Re: Polydentate ligands and coordination number/structure

Just count the areas of electron density, even if its a double bond! Same deal with hybridization
by Bella Martin
Tue Jul 30, 2019 9:51 pm
Forum: Identifying Acidic & Basic Salts
Topic: final review Fe(OH​2)​6 3+???
Replies: 1
Views: 85

Re: final review Fe(OH​2)​6 3+???

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.
by Bella Martin
Tue Jul 30, 2019 9:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Tetrahedral geometry with two lone pairs
Replies: 1
Views: 75

Re: Tetrahedral geometry with two lone pairs

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.
by Bella Martin
Tue Jul 30, 2019 9:45 pm
Forum: Dipole Moments
Topic: Lone pairs and hydrogen bonding
Replies: 2
Views: 88

Re: Lone pairs and hydrogen bonding

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!
by Bella Martin
Sun Jul 28, 2019 12:49 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Compound 6th edition
Replies: 2
Views: 107

Re: Coordination Compound 6th edition

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?
by Bella Martin
Sun Jul 28, 2019 12:09 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate
Replies: 8
Views: 720

Re: Polydentate

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...
by Bella Martin
Tue Jul 09, 2019 9:20 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Exercise 2.29
Replies: 10
Views: 992

Re: Exercise 2.29

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...
by Bella Martin
Sun Nov 27, 2016 10:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912664

Re: Post All Chemistry Jokes Here

I have lots of Chemistry jokes, I'm just not sure all of them will get a good reaction
by Bella Martin
Tue Nov 15, 2016 2:50 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Energy difference between atomic orbital vs. hybrid orbtial [ENDORSED]
Replies: 1
Views: 795

Energy difference between atomic orbital vs. hybrid orbtial [ENDORSED]

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...
by Bella Martin
Sun Nov 13, 2016 11:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: lone pairs and naming the shape
Replies: 2
Views: 387

lone pairs and naming the shape

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 +...
by Bella Martin
Sun Nov 13, 2016 11:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: I'm bad at formal charge please help :(
Replies: 1
Views: 227

I'm bad at formal charge please help :(

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...
by Bella Martin
Sun Nov 06, 2016 11:33 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912664

Re: Post All Chemistry Jokes Here

What type of bond is the tastiest? a Pi bond!
by Bella Martin
Sun Oct 30, 2016 11:08 pm
Forum: Resonance Structures
Topic: Question from the quiz
Replies: 1
Views: 200

Question from the quiz

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...
by Bella Martin
Sun Oct 23, 2016 11:59 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: ml configuration for d subshells
Replies: 1
Views: 221

ml configuration for d subshells

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?
by Bella Martin
Sun Oct 16, 2016 6:00 pm
Forum: Properties of Electrons
Topic: Mass
Replies: 1
Views: 307

Mass

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.
by Bella Martin
Sun Oct 09, 2016 2:26 pm
Forum: Photoelectric Effect
Topic: Photons vs. Particles [ENDORSED]
Replies: 2
Views: 397

Re: Photons vs. Particles [ENDORSED]

This was very helpful! Thank you
by Bella Martin
Sun Oct 09, 2016 12:12 am
Forum: Photoelectric Effect
Topic: Photons vs. Particles [ENDORSED]
Replies: 2
Views: 397

Photons vs. Particles [ENDORSED]

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...
by Bella Martin
Mon Oct 03, 2016 12:21 am
Forum: Properties of Light
Topic: Chem joke!
Replies: 1
Views: 184

Chem joke!

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

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