Search found 50 matches
- Sat Dec 07, 2019 8:24 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: H20
- Replies: 4
- Views: 219
Re: H20
as a general rule, i think if there are more than one lone pairs on the same atom, it would still be considered a monodentate
- Sat Dec 07, 2019 8:17 pm
- Forum: Resonance Structures
- Topic: when there is resonance
- Replies: 5
- Views: 424
Re: when there is resonance
no i don't think two atoms can have a resonance structure
- Sat Dec 07, 2019 8:05 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Negative pH
- Replies: 5
- Views: 324
Re: Negative pH
do we need to know any super acids for the final?
- Sat Dec 07, 2019 8:04 pm
- Forum: Trends in The Periodic Table
- Topic: Exceptions to Electronegativity
- Replies: 6
- Views: 826
Re: Exceptions to Electronegativity
other than Noble Gases i don't think there are any other exceptions
- Sat Dec 07, 2019 8:02 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: H2O and Carbonate
- Replies: 3
- Views: 204
Re: H2O and Carbonate
adding onto this reply for water, even though there are two lone pairs, both are on the O. Since the lone pairs are on the same atom, it doesn't matter that there are two lone pairs, its still only monodentate
- Sun Dec 01, 2019 4:41 pm
- Forum: Bronsted Acids & Bases
- Topic: Distinguishing between Strong and Weak Acids/Bases
- Replies: 7
- Views: 434
Re: Distinguishing between Strong and Weak Acids/Bases
i think you should memorize some of the common strong and weak acid/bases. other than that, there are some trends you can pick up on. for example, Dr. Lavelle mentioned that if there's a N involved, its probably a weak base.
- Sun Dec 01, 2019 4:36 pm
- Forum: Student Social/Study Group
- Topic: readings
- Replies: 13
- Views: 840
Re: readings
like the others said, i don't think it is necessary to read through the entire textbook (unless you want to). If you're just trying to study for the final, you should be good by reading just the sections corresponding to the homework and are mentioned in the outline.
- Sun Dec 01, 2019 4:26 pm
- Forum: Student Social/Study Group
- Topic: Final Topics
- Replies: 4
- Views: 239
Re: Final Topics
i would only focus on what is included in his outlines.
- Sun Dec 01, 2019 4:20 pm
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 5
- Views: 290
Re: Cisplatin
I remember Dr. Lavelle mentioning how we should know how the cisplatin works, but i don't think we need to know anything more than the extent of what is mentioned above ^
- Sun Dec 01, 2019 4:17 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pH Scale is broken?
- Replies: 6
- Views: 521
Re: pH Scale is broken?
i think knowing that there are acids and bases that go beyond the scale is enough, we don't need to specifically memorize any cases of that.
- Sun Nov 24, 2019 1:06 am
- Forum: Hybridization
- Topic: Sigma and Pi Bonds
- Replies: 7
- Views: 434
Re: Sigma and Pi Bonds
i think we just have to know how to count them, know which one is stronger, and their different interactions with the internuclear axis
- Sun Nov 24, 2019 12:45 am
- Forum: Hybridization
- Topic: Hybridization
- Replies: 1
- Views: 141
Re: Hybridization
its essentially 3 sp2 orbitals in one plane (imagine them laying flat) and then one p orbital point up and one point down.
- Sun Nov 24, 2019 12:42 am
- Forum: Hybridization
- Topic: Strength of sigma and pi bonds
- Replies: 8
- Views: 617
Re: Strength of sigma and pi bonds
there are more electron overlaps in sigma bonds which make them a lot stronger than pi bonds and thus requiring more energy to break
- Sun Nov 24, 2019 12:40 am
- Forum: Bronsted Acids & Bases
- Topic: Fundamentals question J.9
- Replies: 1
- Views: 137
Re: Fundamentals question J.9
probably save to know it just in case, especially for this acid and base section
- Sun Nov 24, 2019 12:37 am
- 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 Sites
- Replies: 3
- Views: 251
Re: Hydrogen Bonding Sites
yes the 2 lone pairs on oxygen in H2O are both able to form their own respective hydrogen bond with other hydrogens.
- Sat Nov 16, 2019 10:16 pm
- Forum: Hybridization
- Topic: test 2
- Replies: 8
- Views: 438
Re: test 2
does anyone know if this test is cumulative? are we gonna be tested on some info from before the midterm
- Sat Nov 16, 2019 10:13 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: sigma and pi bonds
- Replies: 2
- Views: 128
Re: sigma and pi bonds
i think we are going to learn more about sigma and pi bonds in class on monday
- Sat Nov 16, 2019 10:11 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Dipole moments
- Replies: 2
- Views: 169
Re: Dipole moments
not sure if this is what you're asking about, but i think you keep the bond lines the same. to show dipole you would draw an additional line with an arrow to show which side is positive and which is negative.
- Sat Nov 16, 2019 10:07 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent and Angular?
- Replies: 6
- Views: 330
Re: Bent and Angular?
yes! as long as you remember that they mean the same thing, you should be able to use them interchangeably.
- Sat Nov 16, 2019 10:04 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Subscript on E
- Replies: 5
- Views: 285
Re: Subscript on E
as long as you understand that if its just E, that means there's an invisible 1 there, it shouldn't really matter whether or not you actually put the 1 in when writing the answer
- Sun Nov 10, 2019 3:32 pm
- Forum: Dipole Moments
- Topic: Dipole moments
- Replies: 6
- Views: 304
Re: Dipole moments
induced dipole moment is caused whej a polarizing molecules gets close enough to a non polarized molecule that it disturbs it’s electron arrangement of the non polarized molecule
- Sun Nov 10, 2019 3:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 7
- Views: 411
Re: Test 2
i think it will start on outline 3 from where the midterm cut off point was
- Sun Nov 10, 2019 3:27 pm
- Forum: Bond Lengths & Energies
- Topic: test 2
- Replies: 16
- Views: 783
Re: test 2
Matt F wrote:Test 2 is in week 8, right? I'm sure some of the prior material will be on it (at least the stuff on chemical bonds) since otherwise it'll only be covering a week or so of material.
yea test two is week 8!
- Sun Nov 10, 2019 3:24 pm
- Forum: Bond Lengths & Energies
- Topic: Bond Strength
- Replies: 4
- Views: 224
Re: Bond Strength
there are lots of different factors affecting bond strength such as bond length, number of lone pairs, bond multiplicity and more
- Sun Nov 10, 2019 3:22 pm
- Forum: Electronegativity
- Topic: electronegativity values
- Replies: 6
- Views: 335
Re: electronegativity values
we are not responsible for knowing exact electronegative numbers, as long as you know the general trend you will be fine!
- Sun Nov 03, 2019 3:31 pm
- Forum: Bond Lengths & Energies
- Topic: Strength of Bonds
- Replies: 16
- Views: 577
Re: Strength of Bonds
triple bonds are shorter than double which is shorter than single. then, the shorter the bond lengths are, the closer the electrons are being held together and therefore the stronger the bonds since more energy is needed to break the bond.
- Sun Nov 03, 2019 3:28 pm
- Forum: Bond Lengths & Energies
- Topic: dissociation energy
- Replies: 7
- Views: 263
Re: dissociation energy
since you are trying to break bonds, energy is always required (its always going in) and therefore it is always going to be positive.
- Sun Nov 03, 2019 3:25 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: 1.E.5 Part D
- Replies: 2
- Views: 83
Re: 1.E.5 Part D
yes since electrons in the s orbital of the same shell us located closer to the nucleus than those of p orbital, the nuclear charge is shielded by the s electrons.
- Sun Nov 03, 2019 3:23 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: En
- Replies: 3
- Views: 203
Re: En
you can use it to find the energy amount of a particular energy level, which can then allow you to calculate the energy difference or the frequency of electron when it goes from one energy level to another
- Sun Nov 03, 2019 3:17 pm
- Forum: Trends in The Periodic Table
- Topic: Effective Nuclear Charge and Nuclear Charge
- Replies: 6
- Views: 206
Re: Effective Nuclear Charge and Nuclear Charge
the effective nuclear charge is smaller than the actual nuclear charge because the inner electrons shield or block the outer electrons from experiencing the full nuclear charge.
- Sun Oct 27, 2019 10:44 am
- Forum: Ionic & Covalent Bonds
- Topic: Does the Octet Rule apply to Boron?
- Replies: 14
- Views: 769
Re: Does the Octet Rule apply to Boron?
a little off topic but C, N, O, F are strict followers of the octet rule!
- Sun Oct 27, 2019 10:41 am
- Forum: SI Units, Unit Conversions
- Topic: Midterm
- Replies: 6
- Views: 312
Re: Midterm
yes those topics will most likely be showing up on the midterm
- Sun Oct 27, 2019 10:38 am
- Forum: Electronegativity
- Topic: Molecular Geometry
- Replies: 4
- Views: 194
Re: Molecular Geometry
if it was on the past midterm exams, then there's a pretty good chance it will also be on this years
- Sun Oct 27, 2019 10:26 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Opposite spin in electron configuration
- Replies: 1
- Views: 72
Re: Opposite spin in electron configuration
normally, ground state electrons would try to automatically obtain a upward arrow spin. so the fact that it went to a downward arrow first even thought the orbital is not yet containing an upward arrow would show that the electron is in an excited state
- Sun Oct 27, 2019 10:23 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Radial Distribution Function
- Replies: 4
- Views: 201
Re: Radial Distribution Function
it wasn't stated in the learning outline so i am assuming we do not have to know how to do that
- Sun Oct 20, 2019 2:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Homework for week 4
- Replies: 3
- Views: 149
Re: Homework for week 4
5 problems from either section should be fine
- Sun Oct 20, 2019 2:55 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: electrons
- Replies: 3
- Views: 225
Re: electrons
electrons further from the nucleus have more energy
- Sun Oct 20, 2019 2:49 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Exceptions for Electron Configuration
- Replies: 6
- Views: 195
Re: Exceptions for Electron Configuration
the examples he gave in class were copper and chromium, however, this does not mean those elements are the only exceptions, period 5 on the periodic table follows the same trend.
- Sun Oct 20, 2019 2:46 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Spin States
- Replies: 4
- Views: 165
Re: Spin States
you can first draw lines to represent number of orbitals in each sub shell, then depending on how many valence electrons there are you can decide how many arrows you need to draw in. in terms of where to draw the arrows, fill each line with 1 arrow first and then if there are more arrows that need t...
- Sun Oct 20, 2019 2:42 pm
- Forum: Properties of Light
- Topic: N levels
- Replies: 8
- Views: 431
Re: N levels
in addition to that Dr, Lavelle always draws out the n levels on his board using lines. as the energy level increases, the distance between the new energy level and previous one decreases.
- Sat Oct 12, 2019 1:56 pm
- Forum: Photoelectric Effect
- Topic: Rydberg Constant
- Replies: 1
- Views: 77
Re: Rydberg Constant
Yes you can them. Also side note that Rydberg constant/eqn works only for hydrogen atoms
- Sat Oct 12, 2019 1:36 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: H-Atom
- Replies: 3
- Views: 150
Re: H-Atom
Photoelectron spectroscopy works for other atoms as well but the Bohr model (first quantized model of the atoms) worked only for H
- Sat Oct 12, 2019 1:26 pm
- Forum: Photoelectric Effect
- Topic: What is high light frequency?
- Replies: 3
- Views: 95
Re: What is high light frequency?
There isn’t a specific number where the frequency is enough to remove an electron. This would depend on the situation and the metals used. But in general when the energy per incoming photon is greater than an electrons threshold, the electron will be removed.
- Sat Oct 12, 2019 1:21 pm
- Forum: Properties of Electrons
- Topic: Clarification on particle vs wave properties
- Replies: 3
- Views: 226
Re: Clarification on particle vs wave properties
Because electrons are quantized (have fixed locations) and since light can interfere and diffract it can be said that light has wave like properties. Photoelectric effect (shows that when light is shone onto a metal surface, electrons could be ejected) shows the particle side of the duality for light.
- Sat Oct 12, 2019 1:10 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Test 1 [ENDORSED]
- Replies: 107
- Views: 16814
Re: Test 1 [ENDORSED]
Does anyone know where and when our grades for this class will be updated?
- Thu Oct 03, 2019 9:09 pm
- Forum: Significant Figures
- Topic: Sig figs in intermediate steps??
- Replies: 5
- Views: 892
Re: Sig figs in intermediate steps??
it could seem like a hassle preserving your decimals for every little step but if you don’t sometimes your final answer could be off by a few digits, which i’m not sure if that’ll result in points being docked, but my advice would be to definitely watch out for that!
- Thu Oct 03, 2019 9:06 pm
- Forum: SI Units, Unit Conversions
- Topic: Kelvin, Celsius, & Fahrenheit Conversions
- Replies: 3
- Views: 105
Re: Kelvin, Celsius, & Fahrenheit Conversions
the ones he went over in class are:
F=(1.8C)+32
and k= C+273.15
F=(1.8C)+32
and k= C+273.15
- Thu Oct 03, 2019 9:03 pm
- Forum: Limiting Reactant Calculations
- Topic: Study Strategies/Youtube Videos
- Replies: 14
- Views: 514
Re: Study Strategies/Youtube Videos
if you’re not looking for help on a specific topic but more like an overview of gen chem as a whole, i watched “the organic chemistry tutor”! it’s rly long but also covers a lot of topics
- Tue Oct 01, 2019 2:41 pm
- Forum: Significant Figures
- Topic: Could someone please clarify about Sig Figs?
- Replies: 4
- Views: 136
Re: Could someone please clarify about Sig Figs?
So if it’s 0s after the decimal: any 0 before actual numbers don’t count as sigfig but any 0 after the actual numbers do count. In addition, if the number is, say, 100 then sigfig is 1 digit. but if it’s 100. (notice the decimal) then the sigfig becomes 3 digits. if it’s 100.0 then it’s 4 and so on....
- Tue Oct 01, 2019 2:32 pm
- Forum: SI Units, Unit Conversions
- Topic: Textbook
- Replies: 7
- Views: 221
Re: Textbook
Hey, most of us have a pdf version of it. so if it’s not too distracting for you to use electronics in class, i think it’s a good idea to just open it up on your laptop and follow along during the lectures!