Search found 51 matches
- Sat Dec 07, 2019 8:24 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: different Rydberg
- Replies: 3
- Views: 358
Re: different Rydberg
Is it ok to use to use the second one?
- Sat Dec 07, 2019 5:15 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Kw
- Replies: 3
- Views: 355
Kw
What does Kw represent?
- Sat Dec 07, 2019 4:05 pm
- Forum: Naming
- Topic: transition metal suffix
- Replies: 2
- Views: 266
transition metal suffix
Can someone explain how to name the transition metal when the complex is positive, negative, and neutral overall?
- Sat Dec 07, 2019 1:28 pm
- Forum: Hybridization
- Topic: double and triple bonds
- Replies: 6
- Views: 507
double and triple bonds
How do double and triple bonds work with hybridization?
- Sat Dec 07, 2019 12:30 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: cis vs trans
- Replies: 5
- Views: 436
cis vs trans
What is the difference between the cis and trans forms of a molecule?
- Sat Dec 07, 2019 12:13 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: Strength
- Replies: 6
- Views: 462
Re: Strength
Where does ion - dipole fit into this?
- Fri Dec 06, 2019 9:14 pm
- Forum: Naming
- Topic: naming formula for coordination compounds
- Replies: 1
- Views: 191
Re: naming formula for coordination compounds
It is alphabetical but without considering the prefixes (bi, tri, etc.)
- Fri Dec 06, 2019 9:12 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: salts of weak bases/acids
- Replies: 2
- Views: 231
Re: salts of weak bases/acids
To determine if salt is acidic or basic you need to look at the ions it produces. Tables 6D.1 and 6D.2 in the text book list which cations and anions are acidic or basic.
- Fri Dec 06, 2019 9:06 pm
- Forum: Lewis Acids & Bases
- Topic: 6.13
- Replies: 1
- Views: 152
6.13
Why can B(OH)3 act as a lewis acid and accept another OH when boron normally forms only 3 bonds?
- Fri Dec 06, 2019 5:05 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: HF
- Replies: 4
- Views: 414
HF
Why is HF not a strong acid even though fluorine is very electronegative?
- Thu Dec 05, 2019 9:22 pm
- Forum: Amphoteric Compounds
- Topic: 6A.17
- Replies: 2
- Views: 309
Re: 6A.17
How can you tell what is amphoteric just by looking at the formula of the compound?
- Tue Nov 26, 2019 9:22 pm
- Forum: Naming
- Topic: Bis,tris, etc
- Replies: 6
- Views: 305
Bis,tris, etc
When do we use the prefixes bis, tris, tetrakis, pentakis, etc?
- Tue Nov 26, 2019 8:36 pm
- Forum: Biological Examples
- Topic: vitamin b12
- Replies: 3
- Views: 225
Re: vitamin b12
I don't this we need to know specific examples, just have a general understanding of how coordination compounds are biologically significant.
- Tue Nov 26, 2019 8:26 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate ligands/Shapes
- Replies: 2
- Views: 210
Re: Polydentate ligands/Shapes
The shape of the ligand is based on the VSEPR shape around the central atom. By knowing the shape of the ligand, you can see how it could possible bind to the metal in what locations, and then figure out the general shape of the complex as a whole.
- Tue Nov 26, 2019 8:23 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Summary for Naming Coordination Compounds
- Replies: 3
- Views: 239
Re: Summary for Naming Coordination Compounds
The subspecies names should be listed in alphabetical order (not including the prefixes like mono, di, etc). Then add on the prefixes based on how many of one subspecies there are, for example: (CN)3 would be tricyano. Then the metal name should be listed. If the compound has an overall negative cha...
- Tue Nov 26, 2019 8:12 pm
- Forum: Amphoteric Compounds
- Topic: How can compounds be amphoteric?
- Replies: 5
- Views: 251
Re: How can compounds be amphoteric?
To add on, another example of an amphoteric compound is H2O.
- Tue Nov 26, 2019 8:03 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Chelate
- Replies: 3
- Views: 244
Chelate
Is a chelate just any polydentate ligand that has the ability to form a ring?
- Tue Nov 26, 2019 8:00 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Test #2 handback
- Replies: 11
- Views: 702
Re: Test #2 handback
I think in discussion this week, or in your TA's office hours if your discussion is during break.
- Wed Nov 20, 2019 4:01 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: 7
- Views: 542
Re: Boiling Point
I agree that SO2 would have the higher boiling point for the reasons above. Intermolecular forces are what is important in this instance, not intramolecular bonds.
- Wed Nov 20, 2019 3:59 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E.25
- Replies: 3
- Views: 209
Re: 2E.25
I think it would help if you thought about the molecule in three dimensions. It would have a tetrahedral shape and so regardless of how the lewis structure is drawn, in real life, from any perspective, one side of the molecule would have the two hydrogens and the others would have the two chlorines,...
- Wed Nov 20, 2019 3:55 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizability
- Replies: 9
- Views: 783
Re: polarizability
Larger molecules also have more electrons in general which makes them more polarizable.
- Wed Nov 20, 2019 3:53 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Do we need to know the pentagonal bipyramidal model for Test 2?
- Replies: 6
- Views: 383
Re: Do we need to know the pentagonal bipyramidal model for Test 2?
I think it would be good to know for the future, regardless if we need to know it now.
- Wed Nov 20, 2019 3:51 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape vs. Geometry
- Replies: 5
- Views: 314
Re: Molecular Shape vs. Geometry
The electron pair geometry is based only on how many regions of electron density there are around the atom (whether it is a bonding pair or lone pair is irrelevant). If a molecule has 2 regions of electron density, then the electron density is linear, if there is 3: trigonal planar, 4: tetrahedral, ...
- Wed Nov 20, 2019 3:44 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordinate bonds
- Replies: 3
- Views: 208
Coordinate bonds
Can someone explain how coordinate bonds and ligands work?
- Thu Nov 14, 2019 7:37 pm
- Forum: General Science Questions
- Topic: Final
- Replies: 10
- Views: 667
Re: Final
I believe the final is cumulative.
- Thu Nov 14, 2019 7:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Trigonal Pyramid vs Trigonal Planar
- Replies: 6
- Views: 442
Re: Trigonal Pyramid vs Trigonal Planar
Trigonal planar has just three areas of electron density. Trigonal pyramidal has four areas of electron density, one of those areas being a lone pair.
- Thu Nov 14, 2019 7:33 pm
- Forum: Dipole Moments
- Topic: Molecular Structure
- Replies: 2
- Views: 232
Re: Molecular Structure
The opposite is true. The molecular structures influence the dipole moment.
- Thu Nov 14, 2019 7:32 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 7
- Views: 517
Re: Midterm
I went and talked to my TA.
- Thu Nov 14, 2019 7:31 pm
- Forum: Lewis Structures
- Topic: Lewis Structure
- Replies: 6
- Views: 418
Re: Lewis Structure
To make sure a lewis structure is at its lowest energy you should calculate the formal charge for each atom. The lewis structure with the most formal charges closest to zero is the most stable and has the lowest energy.
- Sun Nov 03, 2019 8:54 pm
- Forum: Lewis Structures
- Topic: Radicals
- Replies: 5
- Views: 191
Re: Radicals
Can someone explain why the more electronegative element gets the radical? In my mind, it would make more sense for the less electronegative one to have it.
- Sat Nov 02, 2019 7:43 pm
- Forum: Lewis Structures
- Topic: Ion formation vs molecule
- Replies: 2
- Views: 80
Re: Ion formation vs molecule
To see if an ionic or covalent bond would from you should look at the difference in electronegativity between the two atoms involved in the bond. If the electronegativity difference is greater than than 2 then an ionic bond will form. If the electronegativity difference is less than 1.5 then a coval...
- Sat Nov 02, 2019 7:37 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electron Distortion
- Replies: 4
- Views: 280
Electron Distortion
What does it mean for an electron to be distorted in a bond?
- Sat Nov 02, 2019 7:31 pm
- Forum: Lewis Structures
- Topic: Determining most stable Lewis structure
- Replies: 5
- Views: 279
Re: Determining most stable Lewis structure
Formal charge is the most important in determining the most stable structure.
- Sat Nov 02, 2019 7:23 pm
- Forum: Dipole Moments
- Topic: Midterm
- Replies: 8
- Views: 322
Re: Midterm
I don't think so because that was on the last page of notes and he said that content would not be covered on the midterm.
- Tue Oct 29, 2019 9:12 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence Electrons?
- Replies: 15
- Views: 943
Re: Valence Electrons?
Could someone further clarify the answer to this question? I'm still confused about how to figure out the number of valence electrons for transition metals.
- Fri Oct 25, 2019 8:08 pm
- Forum: Ionic & Covalent Bonds
- Topic: ion charge
- Replies: 3
- Views: 130
Re: ion charge
You should look at the number of valence electrons the element has based on its position in the periodic table. For example, sulfur has 6 valence electrons and so would gain 2 more electrons to have a full octet. Gaining 2 electrons would then make a -2 ion.
- Fri Oct 25, 2019 8:05 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D.19
- Replies: 3
- Views: 275
Re: 1D.19
You would find ml from l.
- Fri Oct 25, 2019 7:59 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Magnetic Quantum Number
- Replies: 5
- Views: 151
Re: Magnetic Quantum Number
You would write out all the values like -2, -1, 0, 1, 2, because those are the values, not 5.
- Fri Oct 25, 2019 7:55 pm
- Forum: Sigma & Pi Bonds
- Topic: Difference between Sigma & Pi
- Replies: 5
- Views: 210
Re: Difference between Sigma & Pi
I know that both can exist at the same time in a molecule.
- Fri Oct 25, 2019 7:41 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Homework Help
- Replies: 5
- Views: 183
Re: Homework Help
You should also look at if the spins are all in the same direction for an orbital filled with just parallel electrons to make sure it is in the ground state.
- Sun Oct 20, 2019 4:26 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Wave Function
- Replies: 4
- Views: 125
Wave Function
Is a wave function just the set of the four quantum numbers of an electron?
- Sun Oct 20, 2019 4:22 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: paired and parallel electrons
- Replies: 3
- Views: 142
Re: paired and parallel electrons
According to Hund's rule, every orbital must have one electron before each orbital has a pair of electrons. The number of electrons before you can start pairing depends on the orbital. For example, in a p subshell if there was only 3 electrons, they would all be parallel. However, if there was 4 ele...
- Sun Oct 20, 2019 4:13 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3045336
Re: Post All Chemistry Jokes Here
Why do chemists enjoy working with ammonia? Because it's pretty basic stuff.
- Sun Oct 20, 2019 4:06 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Spin up and spin down
- Replies: 13
- Views: 1082
Re: Spin up and spin down
An electron does not actually spin "up" or "down" these are just words we use to describe 2 different states.
- Sat Oct 19, 2019 9:50 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: how to prepare
- Replies: 22
- Views: 836
Re: how to prepare
Going to the step up sessions or making your own study group could be helpful!
- Sat Oct 19, 2019 9:47 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Which Element to Use in Electron Configurations
- Replies: 5
- Views: 240
Re: Which Element to Use in Electron Configurations
When writing out electron configurations out, there are 2 formats you can use. The first format is writing it all out, for example the electron configuration for lithium would be writing as 1s2 2s1. The second format is naming the past noble gas before the element and just writing the configuration ...
- Tue Oct 08, 2019 8:00 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3045336
Re: Post All Chemistry Jokes Here
If no one laughs at your chem jokes, keep going until you get a reaction.
- Tue Oct 08, 2019 7:54 pm
- Forum: Significant Figures
- Topic: Answer being a tad bit off
- Replies: 8
- Views: 546
Re: Answer being a tad bit off
I remember my TA saying that you should have the exact answer if a problem was done correctly so you would get a point off if it was a little off.
- Tue Oct 08, 2019 7:53 pm
- Forum: SI Units, Unit Conversions
- Topic: test and question e1
- Replies: 3
- Views: 189
Re: test and question e1
I also believe you would not be deducted points for that. However, I do remember it was mentioned that you should put your answer in the most logical unit.
- Tue Oct 08, 2019 7:48 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 147511
Re: Reading the textbook
Reading the textbook helps me understand the concepts at my own pace. I find it really useful!
- Tue Oct 08, 2019 7:43 pm
- Forum: SI Units, Unit Conversions
- Topic: Will we have to know how to convert from Fahrenheit, Celsius, and Kelvin?
- Replies: 4
- Views: 242
Re: Will we have to know how to convert from Fahrenheit, Celsius, and Kelvin?
I was wondering the same thing