Search found 30 matches
- Sun Dec 09, 2018 1:01 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E 7 7th edition
- Replies: 1
- Views: 315
2E 7 7th edition
Is the answer book wrong on this problem? I got the VSEPR shape to be AX2E but the book says it that is trigonal pyramidal. Shouldn't it be bent?
- Sat Dec 08, 2018 8:04 pm
- Forum: Naming
- Topic: metal ions
- Replies: 1
- Views: 218
Re: metal ions
Are you talking about the ligands? I think we need to know edta, en, and dien.
- Sat Dec 08, 2018 12:17 pm
- Forum: Naming
- Topic: Cation Naming
- Replies: 2
- Views: 320
Cation Naming
Just to clarify, you add -ate onto the end of a transition metal when the anion is the complex ion and not the cation?
- Fri Nov 30, 2018 7:59 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: 17.33
- Replies: 1
- Views: 237
Re: 17.33
I believe that polydentate refers to ligands that are bonded with more than one atom.
Naming
When do we use Roman numerals when naming? Are there only certain elements that need to have them?
- Fri Nov 30, 2018 7:54 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 10
- Views: 890
Re: Coordination Number
I remember the coordination number as the number of bonds to the central atom.
- Fri Nov 30, 2018 7:48 pm
- Forum: Dipole Moments
- Topic: Induced Dipole - Induced Dipole
- Replies: 3
- Views: 452
Induced Dipole - Induced Dipole
Are induced dipole - induced dipole the same as dipole - dipole? I have that term written down in my notes but I am not exactly sure what the difference between them is?
- Fri Nov 30, 2018 7:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw
- Replies: 13
- Views: 2004
Seesaw
Are the bond angles for the seesaw shape <120 degrees and <180 or is it 90 and 120?
- Fri Nov 30, 2018 7:44 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: 17.31
- Replies: 2
- Views: 250
Re: 17.31
Is this problem set from the 7th edition book?
- Wed Nov 14, 2018 7:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How are polarity and polarizability different?
- Replies: 3
- Views: 2440
Re: How are polarity and polarizability different?
Polarity is the distribution of electric charge in a molecule, while I am pretty sure that every molecule, polar or not, has a polarizability. That polarizability is dependent the number of electrons and size of atom/molecule. I am kind of confused about this concept as well but I hope this somewhat...
- Wed Nov 14, 2018 7:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: H20
- Replies: 3
- Views: 475
Re: H20
Thank you! Can you explain what difference between electron geometry and molecular geometry is?
- Wed Nov 14, 2018 7:39 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: IMFs [ENDORSED]
- Replies: 2
- Views: 331
Re: IMFs [ENDORSED]
In the practice problems I've seen so far, it doesn't seem like we need to know how IMFs affect surface tension or viscosity. I think we mostly need to understand how IMFs work themselves and how to differentiate between all the different types of them.
- Wed Nov 14, 2018 7:36 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: H20
- Replies: 3
- Views: 475
H20
What kind of molecular shape would H20 take on? Is it tetrahedral or bent and why? I seemed to get confused about this example in section today.
- Sat Nov 10, 2018 11:59 pm
- Forum: Dipole Moments
- Topic: Induced-Dipole Induced-Dipole
- Replies: 5
- Views: 617
Induced-Dipole Induced-Dipole
Can someone explain what this concept is? And how it relates to electron distribution?
- Sat Nov 10, 2018 11:52 pm
- Forum: Dipole Moments
- Topic: Interaction Potential Energy
- Replies: 4
- Views: 380
Re: Interaction Potential Energy
Does anyone know what kind of conceptual question could be asked regarding this topic? I don't seem to know where in my notes this was discussed. Thank you!
- Sat Nov 10, 2018 11:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar and Nonpolar Molecules
- Replies: 4
- Views: 459
Re: Polar and Nonpolar Molecules
Polar molecules have two parts with opposite charges that attract to one another, but non polar molecules do not have dipole, therefore they do not have opposing charges.
- Sat Nov 10, 2018 11:44 pm
- Forum: Electronegativity
- Topic: Electronegativity and Electron Affinity
- Replies: 4
- Views: 477
Electronegativity and Electron Affinity
In my notes from section for periodic trends, it says that electronegativity and electronegativity have the same trends. Can someone explain what the difference between the two are in simple terms? I seem to be getting this concept confused.
- Sat Nov 10, 2018 11:37 pm
- Forum: Dipole Moments
- Topic: Bond Lengths
- Replies: 5
- Views: 585
Re: Bond Lengths
Yes, like said above, single bonds are the longest and weakest bonds, while triple bonds are the shortest but the strongest types of bonds with double bonds in the middle of the two. The shorter bonds are more likely involved in a reaction, and shorter bonds tend to be less reactive.
- Fri Nov 02, 2018 10:08 pm
- Forum: Lewis Structures
- Topic: Formal Charges
- Replies: 2
- Views: 223
Formal Charges
Im sorry this might be a dumb question, but when we are writing out the Lewis structures, I know that we write the least electronegative atom in the center, but when we write the atoms on the outside does it matter where they go when we are trying to find their formal charges?
- Fri Nov 02, 2018 9:34 pm
- Forum: Resonance Structures
- Topic: 2B.19 (7th ed)
- Replies: 2
- Views: 297
Re: 2B.19 (7th ed)
I am kind of confused about this too. Does having two lone pairs instead of one make the structure more stable?
- Fri Nov 02, 2018 9:14 pm
- Forum: Electronegativity
- Topic: ionic vs. covalent bonding
- Replies: 2
- Views: 319
ionic vs. covalent bonding
I know that in lecture we learned that if the electronegativity difference is greater than two than there is an ionic bond and if the different is less than 1.5 then there is a covalent bond but what if the electronegativity difference is in the .5 between 1.5 and 2?
- Tue Oct 23, 2018 7:24 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Test 2 and Homework Problems
- Replies: 6
- Views: 636
Re: Test 2 and Homework Problems
Does anyone know if the test is strictly problem based or will there be conceptual questions as well?
- Tue Oct 23, 2018 7:21 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: 1A 15 7th edition help
- Replies: 1
- Views: 268
1A 15 7th edition help
How would you begin to solve this question? In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line. I know it has to do with the R...
- Tue Oct 23, 2018 6:41 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: HW Question Regarding 1B.27
- Replies: 6
- Views: 576
Re: HW Question Regarding 1B.27
Wait, can someone actually explain why the change in velocity would be 10 and not 5 like it says in the solutions manual?
- Thu Oct 18, 2018 7:24 pm
- Forum: Einstein Equation
- Topic: wave vs particle behavior equations
- Replies: 2
- Views: 317
Re: wave vs particle behavior equations
Yes to all three parts of your question. The equation you mentioned should be used to find either waves or particles but you need one to find the other.
- Thu Oct 18, 2018 7:05 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Homework Problem 2.13
- Replies: 1
- Views: 125
Re: Homework Problem 2.13
I believe that the orbital of the lobe refers to where it borders the axises.
- Tue Oct 16, 2018 8:56 pm
- Forum: Einstein Equation
- Topic: 1B 9 7th edition
- Replies: 2
- Views: 269
1B 9 7th edition
Quick question - when finding the number of photons of violet light that can be generated in 2.0 s, why do you divide 64 J by 4.7 x 10^-19 instead of multiplying the two values?
- Fri Oct 05, 2018 11:48 am
- Forum: Balancing Chemical Reactions
- Topic: Balancing reactions tips
- Replies: 29
- Views: 2039
Re: Balancing reactions tips
My TA advised that your best bet with balancing equations properly and efficiently was to alway balance the single element last as its the easiest to manipulate when all the other parts of the balancing are done. And start with the least occurring element too.
- Fri Oct 05, 2018 11:31 am
- Forum: SI Units, Unit Conversions
- Topic: units during dimensional analysis
- Replies: 4
- Views: 436
Re: units during dimensional analysis
I feel that writing out my units makes it a little easier for me to understand where the problem is headed and what final units I need to end up with are. It does take up space and more time, but in the end it's better for understanding as a whole.
- Wed Oct 03, 2018 9:28 pm
- Forum: SI Units, Unit Conversions
- Topic: Homework Question Edition 6 E1
- Replies: 4
- Views: 423
Re: Homework Question Edition 6 E1
I am also struggling with trying to figure out why the conversion works out like that as well. I am also confused about why 144pm is multiplied by 2 when doing the dimensional analysis method on the problem too.