Search found 47 matches
- 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: 1479
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?
- Wed Jul 31, 2019 9:21 am
- Forum: Naming
- Topic: 9C.1 part c
- Replies: 4
- Views: 1161
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?
Re: CN Charge
This unfortunately is just one of those that you need to memorize :/
- Wed Jul 31, 2019 9:18 am
- Forum: Naming
- Topic: Naming/Coord Comp
- Replies: 4
- Views: 629
Re: Naming/Coord Comp
How do we know when the metal should end in -ate?
- Tue Jul 30, 2019 11:21 pm
- Forum: Conjugate Acids & Bases
- Topic: Delocalization of charge and stability
- Replies: 4
- Views: 1040
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?
- Tue Jul 30, 2019 11:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: definition
- Replies: 2
- Views: 585
Re: definition
kind of like in trigonometry where it would list the three vertices that the angle if referring to
- Tue Jul 30, 2019 11:10 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Formula from Name
- Replies: 4
- Views: 592
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?
- Tue Jul 30, 2019 11:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: how to draw lewis structure
- Replies: 9
- Views: 941
Re: how to draw lewis structure
and be sure to always count formal charge to make sure you have it right!
- Tue Jul 30, 2019 11:07 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hybridization
- Replies: 2
- Views: 545
Re: Hybridization
Count the areas of electron density, not electrons
- Tue Jul 30, 2019 11:01 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar v. Nonpolar
- Replies: 11
- Views: 2129
Re: Polar v. Nonpolar
is CH4 a nonpolar molecule because the vectors of the bonds cancel out? What about CH3+?
- Tue Jul 30, 2019 11:00 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Final Material
- Replies: 2
- Views: 464
Re: Final Material
i've also noticed that formal charge is integrated into these questions too, so be familiar with those as well!
- Tue Jul 30, 2019 10:56 pm
- Forum: Hybridization
- Topic: Unhybridized orbitals
- Replies: 6
- Views: 43700
Re: Unhybridized orbitals
and empty hybridization orbitals allow for pi bonding, right?
- Tue Jul 30, 2019 10:54 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: Induced dipole?
- Replies: 3
- Views: 518
Re: Induced dipole?
But it wouldn't count as a dipole-dipole interaction, right? or would it?
- Tue Jul 30, 2019 10:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 571995
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 ...
- Tue Jul 30, 2019 10:49 pm
- Forum: Conjugate Acids & Bases
- Topic: Water as an Acid/Base
- Replies: 20
- Views: 1570
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?
- Tue Jul 30, 2019 10:44 pm
- Forum: Lewis Acids & Bases
- Topic: Na+
- Replies: 3
- Views: 868
Re: Na+
Are there other elements like Na+ that also do not affect pH?
- Tue Jul 30, 2019 10:42 pm
- Forum: Lewis Acids & Bases
- Topic: Acids & Bases
- Replies: 4
- Views: 632
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?
- 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: 1479
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?
- Tue Jul 30, 2019 10:37 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Why HF is a weaker acid than HCl
- Replies: 17
- Views: 16330
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
- Tue Jul 30, 2019 10:33 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: Polarizability and Bond Strength
- Replies: 2
- Views: 1149
Re: Polarizability and Bond Strength
How does all of this factor into the size of the element?
- Tue Jul 30, 2019 10:30 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: Distinguishing between the different intermolecular forces
- Replies: 9
- Views: 867
Re: Distinguishing between the different intermolecular forces
What kind of bonding happens to nonpolar molecules? aside from LDF
- 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: 1263
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.
- 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: 748
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?
- Tue Jul 30, 2019 10:22 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: homework 9C7 7th edition
- Replies: 2
- Views: 520
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.
- Tue Jul 30, 2019 10:21 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: edta
- Replies: 8
- Views: 1960
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?
- Tue Jul 30, 2019 10:11 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Shape in coordination compound
- Replies: 2
- Views: 505
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.
- Tue Jul 30, 2019 10:07 pm
- Forum: Ionic & Covalent Bonds
- Topic: Test 2 problem
- Replies: 2
- Views: 472
Re: Test 2 problem
Would the same go for HF? Different sides of the spectrum? Or HAt?
- Tue Jul 30, 2019 10:06 pm
- Forum: Dipole Moments
- Topic: Effect of size [ENDORSED]
- Replies: 7
- Views: 1442
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.
- Tue Jul 30, 2019 9:59 pm
- Forum: Octet Exceptions
- Topic: breaking the octet
- Replies: 7
- Views: 1369
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?
- Tue Jul 30, 2019 9:53 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate ligands and coordination number/structure
- Replies: 1
- Views: 404
Re: Polydentate ligands and coordination number/structure
Just count the areas of electron density, even if its a double bond! Same deal with hybridization
- Tue Jul 30, 2019 9:51 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: final review Fe(OH2)6 3+???
- Replies: 1
- Views: 418
Re: final review Fe(OH2)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.
- Tue Jul 30, 2019 9:48 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Tetrahedral geometry with two lone pairs
- Replies: 1
- Views: 380
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.
- Tue Jul 30, 2019 9:45 pm
- Forum: Dipole Moments
- Topic: Lone pairs and hydrogen bonding
- Replies: 3
- Views: 586
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!
- Sun Jul 28, 2019 12:49 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Compound 6th edition
- Replies: 2
- Views: 603
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?
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?
- Sun Jul 28, 2019 12:09 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate
- Replies: 8
- Views: 2183
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...
- Tue Jul 09, 2019 9:20 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Exercise 2.29
- Replies: 10
- Views: 3622
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...
- Sun Nov 27, 2016 10:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3654339
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
- 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: 2507
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...
- Sun Nov 13, 2016 11:44 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: lone pairs and naming the shape
- Replies: 2
- Views: 748
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 +...
- Sun Nov 13, 2016 11:32 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: I'm bad at formal charge please help :(
- Replies: 1
- Views: 471
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...
- Sun Nov 06, 2016 11:33 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3654339
Re: Post All Chemistry Jokes Here
What type of bond is the tastiest? a Pi bond!
- Sun Oct 30, 2016 11:08 pm
- Forum: Resonance Structures
- Topic: Question from the quiz
- Replies: 1
- Views: 420
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...
- Sun Oct 23, 2016 11:59 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: ml configuration for d subshells
- Replies: 1
- Views: 394
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?
- Sun Oct 16, 2016 6:00 pm
- Forum: Properties of Electrons
- Topic: Mass
- Replies: 1
- Views: 462
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.
- Sun Oct 09, 2016 2:26 pm
- Forum: Photoelectric Effect
- Topic: Photons vs. Particles [ENDORSED]
- Replies: 2
- Views: 685
Re: Photons vs. Particles [ENDORSED]
This was very helpful! Thank you
- Sun Oct 09, 2016 12:12 am
- Forum: Photoelectric Effect
- Topic: Photons vs. Particles [ENDORSED]
- Replies: 2
- Views: 685
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...
- Mon Oct 03, 2016 12:21 am
- Forum: Properties of Light
- Topic: Chem joke!
- Replies: 1
- Views: 291
Chem joke!
It is clear that my chemistry grade is suffering because I have not been studying....periodically. :)