Search found 33 matches

by Josceline 3J
Mon Dec 10, 2018 1:44 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 3
Replies: 38
Views: 638

Re: Test 3

The AXE is the formula for VSEPR, no?? OMG was I reading this all wrong all along???
by Josceline 3J
Mon Dec 10, 2018 1:40 am
Forum: Biological Examples
Topic: Cisplatin
Replies: 4
Views: 165

Re: Cisplatin

This is the first time I hear about this. I wish I had known about it sooner. Anyways thanks, everyone.
by Josceline 3J
Mon Dec 10, 2018 1:39 am
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 3
Views: 233

Re: Hybrid Orbitals

I had another question when it comes to hybridization and counting how many bonds we have do lone pairs affect it? In the homework for that section, I remember there was one example where only 3 bonds were created but the answer was sp3 instead of sp2. That's why I'm guessing that something in the l...
by Josceline 3J
Mon Dec 10, 2018 1:35 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: tetrahedral or square planar?
Replies: 5
Views: 260

Re: tetrahedral or square planar?

One thing that we could also use to differentiate between them is that type of metals we are dealing with. For tetrahedral, it consists of all four complexes being non-transitional metals. Square planar in the other hand deals with 2nd and 3rd-row transitional metals.
by Josceline 3J
Mon Dec 10, 2018 1:26 am
Forum: Administrative Questions and Class Announcements
Topic: Discussion Posts
Replies: 2
Views: 205

Re: Discussion Posts

We only get 3 points each week and we can get a total of 30 points for the whole quarter. I think that we had until week 10.
by Josceline 3J
Mon Dec 10, 2018 1:24 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Why HClO2 is a stronger acid than HBrO2?
Replies: 6
Views: 6095

Re: Why HClO2 is a stronger acid than HBrO2?

I honestly thought this was related to the electronegativity of the element. Thanks for all the help.
by Josceline 3J
Mon Dec 10, 2018 1:23 am
Forum: Ionic & Covalent Bonds
Topic: Ion-Dipole
Replies: 3
Views: 270

Re: Ion-Dipole

This are interactions between ions that are charged and a molecule/s that has a dipole.
by Josceline 3J
Mon Dec 10, 2018 1:20 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acidity
Replies: 1
Views: 140

Re: Acidity

I had the same question, but I didn't think this would be on the final since it was the things we cover. :(
by Josceline 3J
Wed Nov 28, 2018 12:26 am
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 3
Views: 233

Re: Hybrid Orbitals

Regarding the hybrid orbitals, I was wondering what determines if it is written as sp3 or sp2. What are we supposed to look at when deciding what number to use, I'm a bit confused.
by Josceline 3J
Wed Nov 28, 2018 12:24 am
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 3
Views: 233

Re: Hybrid Orbitals

I'm also not sure but I was looking at my notes and perhaps it is only the atoms that have both s and p shells full. We need to also consider that the number of hybrids orbitals are simply the regions od electron density.
by Josceline 3J
Wed Nov 28, 2018 12:14 am
Forum: Ionic & Covalent Bonds
Topic: Strength of covalent bonds
Replies: 2
Views: 62

Re: Strength of covalent bonds

I think we have to look at this problem in terms of what type of bonds and how it overlaps. sigma is not overlapping as much as pi bonds so it is stronger in that sense. sorry if this is confusing. Try searching an image online, if you see it might make more sense.
by Josceline 3J
Wed Nov 28, 2018 12:04 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw Shape Bond Angles
Replies: 8
Views: 134

Re: Seesaw Shape Bond Angles

We went over it in discussion, it should be < 120, <90
by Josceline 3J
Wed Nov 28, 2018 12:01 am
Forum: Administrative Questions and Class Announcements
Topic: Week 9 Test
Replies: 6
Views: 166

Re: Week 9 Test

I heard that we need to also feel very confident with the Lewis structures for the sections on molecular structure because an error in the structure can make you get everything else wrong.
by Josceline 3J
Tue Nov 27, 2018 11:58 pm
Forum: Hybridization
Topic: sigma and pi bonds
Replies: 5
Views: 101

Re: sigma and pi bonds

I think it is the other way around. Pi bonds are weaker than the sigma bonds. Pi bonds are easier to break. I think it has to do with the sigma bonds been closer to the nucleus or something like that.
by Josceline 3J
Mon Nov 26, 2018 1:23 am
Forum: Lewis Acids & Bases
Topic: Determine Lewis Acid
Replies: 13
Views: 536

Re: Determine Lewis Acid

Is this like when you need to complete an octet and you form a bond with another nearby atom? If so, in such case would the one seeking to complete the octet be the one that accepts (Lewis acid) and the one that attaches to it (through a bond) the Lewis base??? OR does this have nothing to do with c...
by Josceline 3J
Mon Nov 26, 2018 1:16 am
Forum: Hybridization
Topic: S character
Replies: 4
Views: 84

Re: S character

wait I'm confused, are the s characters like the lone electrons in the central atom which make the bend/push on the attached atoms???
by Josceline 3J
Mon Nov 26, 2018 1:13 am
Forum: Determining Molecular Shape (VSEPR)
Topic: pi-bonds
Replies: 7
Views: 94

Re: pi-bonds

You could think of it as the second bond that is made. The sigma is the first bond (electrons are taken from the center, C--O ). The pi is formed by taking electrons from around the atom to create bonds. I'm not sure if it makes sense unless you see it, at least that's how they showed me.
by Josceline 3J
Mon Nov 26, 2018 1:00 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 3
Replies: 38
Views: 638

Re: Test 3

for test 3 should we go about to study (the book) chapter 4 on molecular structures and shapes or should we focus on studying what the lectures are about? Since the test is supposed to be similar to the homework problems.
by Josceline 3J
Mon Nov 26, 2018 12:55 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Like dissolves like
Replies: 3
Views: 80

Re: Like dissolves like

I'm sorry this is bit out of topic but what part of the book is this? will test 3 cover this too??
by Josceline 3J
Mon Nov 19, 2018 1:04 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Electron geometry vs molecular shape
Replies: 4
Views: 50

Re: Electron geometry vs molecular shape

What is the difference between the molecular shape and the geometry shapes? I know more or so about the molecular but are these different from the geometry ones?? please help
by Josceline 3J
Mon Nov 19, 2018 1:01 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Pi bonds and sigma bonds
Replies: 5
Views: 74

Re: Pi bonds and sigma bonds

The Sigma bond is when two electron clouds meet and create a bond (think of it as the FIRST bond that's made). And the Pi bond is the second bond made. This bond is made from electrons that are around/surrounding the bonded atoms. I don't know if it makes sense because you kind of need to see it but...
by Josceline 3J
Sun Nov 11, 2018 11:57 pm
Forum: Dipole Moments
Topic: Hydrogen Bonds
Replies: 20
Views: 248

Re: Hydrogen Bonds

What exactly makes hydrogen bonds and covalent bonds strong?
by Josceline 3J
Sun Nov 11, 2018 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community Posts
Replies: 3
Views: 101

Re: Chemistry Community Posts

I also started doing the blog post a bit late because I changed classed and I like you said there's no information on the syllabus. But really all you need to do is respond to others comments and ask questions. They told me that you need to have three post each week and that it has to be done no lat...
by Josceline 3J
Sun Nov 11, 2018 11:19 pm
Forum: Properties of Light
Topic: Test 3
Replies: 24
Views: 492

Re: Test 3

So the last test is in week 9, I hope its on the Lewis Structures.
by Josceline 3J
Sun Nov 04, 2018 10:59 pm
Forum: Properties of Electrons
Topic: Electron Configuration
Replies: 9
Views: 268

Re: Electron Configuration

Also, you should take into account that it is 4d^8 and that is always full so it will do anything to get full, hence reach stability. And yeah also because the 4d orbital needs to get filled before the 5s
by Josceline 3J
Sun Nov 04, 2018 10:51 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: electron config. 3d and 4s
Replies: 5
Views: 231

Re: electron config. 3d and 4s

For the 4s orbital n+ l = 4 + 0 = 4. For the 3d n+l = 3 + 2 = 5. So 4s is lower in energy so fills first.After calcium the 3d orbital falls below the 4s in terms of energy. This means the 4s electrons are lost first in chemical reactions and define the atomic radius of the atom. In summary, repulsi...
by Josceline 3J
Sun Oct 28, 2018 1:21 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Writing electron configurations [ENDORSED]
Replies: 5
Views: 91

Re: Writing electron configurations [ENDORSED]

Normally in class, they always start filling the boxes with an up spin and if all the boxes get up spins and you still have extras then the second round is when you would use the down spin. I think you should just stick to this because even the book does it this way.
by Josceline 3J
Sun Oct 28, 2018 1:17 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: electron config. 3d and 4s
Replies: 5
Views: 231

Re: electron config. 3d and 4s

For the 4s orbital n+ l = 4 + 0 = 4. For the 3d n+l = 3 + 2 = 5. So 4s is lower in energy so fills first.After calcium the 3d orbital falls below the 4s in terms of energy. This means the 4s electrons are lost first in chemical reactions and define the atomic radius of the atom. In summary, repulsi...
by Josceline 3J
Sun Oct 28, 2018 1:11 am
Forum: Ionic & Covalent Bonds
Topic: Valence electrons
Replies: 8
Views: 78

Re: Valence electrons

I know that valence electrons are the ones in the outermost shell but can someone please clarify the number of electrons that go in each shell?
by Josceline 3J
Sat Oct 20, 2018 10:02 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty
Replies: 3
Views: 63

Re: Uncertainty

It is like a reciprocal process that since the electron's path will be deflected, if you know the p, then you won't know where it will be. if you know its position, then you won't know its p Thank you so much, your answer really helped. It is much easier to remember and think of this as a reciproca...
by Josceline 3J
Sat Oct 20, 2018 9:56 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Shielding [ENDORSED]
Replies: 14
Views: 506

Re: Shielding [ENDORSED]

Hello everyone, I'm struggling a bit with this concept. In the hw, it told us to find the ground state of elements (ex: Bi which has 83 electrons) and then the answer was [Xe]4f^(14)5d^(10)6s^(2)6p^(3). When it comes to elements with a high number of electrons is there another way to go about this o...
by Josceline 3J
Sat Oct 20, 2018 9:41 pm
Forum: Student Social/Study Group
Topic: Test #2
Replies: 6
Views: 96

Re: Test #2

He said that test 2 is on Quantum world, so is it all of chapter 2?

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