Lewis acids are ELECTRON acceptors (easy way is Acid and Acceptor)
Lewis bases are ELECTRON donors
Bronsted acids are PROTON donors
bronsted bases are PROTON acceptors
Search found 30 matches
- Fri Dec 07, 2018 3:20 pm
- Forum: Lewis Acids & Bases
- Topic: Brontsted and Lewis
- Replies: 1
- Views: 227
- Wed Dec 05, 2018 2:29 pm
- Forum: Amphoteric Compounds
- Topic: amphoteric oxides
- Replies: 3
- Views: 387
Re: amphoteric oxides
kind of the band of metalloids
- Mon Dec 03, 2018 9:57 pm
- Forum: Lewis Acids & Bases
- Topic: Identifying Lewis acid
- Replies: 2
- Views: 343
Re: Identifying Lewis acid
I think it is because Cl- has a high electron affinity
- Wed Nov 28, 2018 2:38 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: TM charge
- Replies: 4
- Views: 484
Re: TM charge
In class today, we saw how the nickel in [Ni (NH3)4 Cl] Cl 2 H2O had a charge of positive 2. I understand that the charge of +2 comes from the -1 charge on both of the Chlorine atoms, but how does the chlorine outside of the coordination compound affect the charge of the TM? Are the compounds outsi...
- Mon Nov 26, 2018 4:47 pm
- Forum: Hybridization
- Topic: 4.73
- Replies: 2
- Views: 357
4.73
The question in the textbook is Identify each as a radical or not: [CH3+; CH4; CH3-; CH2; CH2 2+; CH2 2-]
and the answer was that none of them were radicals but i dont understand why if some of them have lone pairs??
and the answer was that none of them were radicals but i dont understand why if some of them have lone pairs??
- Fri Nov 23, 2018 2:38 pm
- Forum: Sigma & Pi Bonds
- Topic: formation of pi bond
- Replies: 6
- Views: 645
Re: formation of pi bond
No, sigma first then pi. There can only be one sigma bond but mult pi bonds
- Fri Nov 23, 2018 2:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 7
- Views: 794
Polarity
Can someone explain how to draw dipole moments and how do they determine polarity?
- Fri Nov 23, 2018 2:33 pm
- Forum: Dipole Moments
- Topic: Polarity
- Replies: 9
- Views: 986
Re: Polarity
The molecule is linear, but since nitrogen is the least electronegative, it is the central atom. So the molecules are lined up N-N-O. Oxygen is much more electronegative than nitrogen making the molecule negatively charged on the oxygen side and therefore polar. Why are the molecules lined up N-N-O...
- Fri Nov 23, 2018 2:29 pm
- Forum: Hybridization
- Topic: Hybridization Labeling
- Replies: 5
- Views: 669
Re: Hybridization Labeling
I think it shows what two atoms the sigma and pi bonds are between
- Wed Nov 14, 2018 1:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 4
- Views: 597
Re: Midterm
Madeline Lequang 1G wrote:Dr. Lavelle said he posted the solutions to the midterm, but I can't seem to find it. Could somebody please link it
https://lavelle.chem.ucla.edu/wp-conten ... rm_ans.pdf
- Wed Nov 14, 2018 1:39 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Electron density
- Replies: 6
- Views: 655
Re: Electron density
Yes, only the central atom
- Tue Nov 13, 2018 2:28 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polar vs. NonPolar
- Replies: 5
- Views: 610
Re: Polar vs. NonPolar
If you only have a periodic table look for the electronegativities to be different enough but not too different that they are ionic. I believe that Prof. Lavelle said that the examples he will give us will be fairly obvious.
- Sat Nov 10, 2018 11:17 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: molecular shape
- Replies: 3
- Views: 392
molecular shape
does anyone know how many different molecular shapes we will need to memorize?
- Sat Nov 10, 2018 11:15 pm
- Forum: Octet Exceptions
- Topic: octet exceptions
- Replies: 4
- Views: 496
Re: octet exceptions
they can have d states which allows for an expanded octet
- Sat Nov 10, 2018 11:11 pm
- Forum: Student Social/Study Group
- Topic: curve?
- Replies: 20
- Views: 3058
Re: curve?
there is no curve i believe
- Sat Nov 10, 2018 11:09 pm
- Forum: Dipole Moments
- Topic: Polarity and Dipole moments
- Replies: 2
- Views: 331
Re: Polarity and Dipole moments
Dipole moment generally decides the polarity of a molecule.
- Sat Nov 10, 2018 11:07 pm
- Forum: Student Social/Study Group
- Topic: Sig Figs on Midterm
- Replies: 13
- Views: 1597
Re: Sig Figs on Midterm
Always answer in significant figures to get used to it
- Sat Nov 10, 2018 11:04 pm
- Forum: Ionic & Covalent Bonds
- Topic: inter/intramolecular bond strength
- Replies: 1
- Views: 384
inter/intramolecular bond strength
are there any exceptions to which bonds are stronger than others? (ie: this hydrogen bond is not as strong etc)
- Sat Nov 10, 2018 10:58 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: trigonal pyramidal
- Replies: 3
- Views: 293
trigonal pyramidal
can someone explain why trigonal pyramidal is the best shape to get the atoms the farthest away from each other?
- Sat Nov 10, 2018 10:55 pm
- Forum: Dipole Moments
- Topic: Hydrogen Bonds
- Replies: 20
- Views: 1574
Re: Hydrogen Bonds
hydrogen bonds are the strongest bonds between molecules
- Sat Nov 10, 2018 10:54 pm
- Forum: Ionic & Covalent Bonds
- Topic: delta positive delta negative
- Replies: 15
- Views: 2346
Re: delta positive delta negative
i believe the electron acceptor is delta negative and the donor is delta positive
- Sat Nov 10, 2018 10:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape
- Replies: 1
- Views: 212
Re: Molecular Shape
the two atoms on either side do not have to be the same. HCN is linear and is composed of 3 different elements
- Sat Nov 10, 2018 10:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape
- Replies: 2
- Views: 320
Re: Molecular Shape
No. An example of this is hydrogen cyanide
- Sat Nov 10, 2018 10:48 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent vs Hydrogen bond in H20
- Replies: 4
- Views: 1760
Re: Covalent vs Hydrogen bond in H20
The bonds are covalent but two h2o molecules are bonded through hydrogen bonds
- Sat Nov 10, 2018 4:12 pm
- Forum: Ionic & Covalent Bonds
- Topic: Iconic v Covalent Strength
- Replies: 4
- Views: 412
Iconic v Covalent Strength
Why are ionic bonds stronger than covalent?
- Sat Nov 03, 2018 12:10 pm
- Forum: Ionic & Covalent Bonds
- Topic: Electronegativity Difference
- Replies: 6
- Views: 679
Re: Electronegativity Difference
i dont think we'll have to worry about small differences like those since we wont be given exact numbers. he said he would only give problems if they're really obviously ionic or covalent.
- Fri Oct 26, 2018 3:51 pm
- Forum: Ionic & Covalent Bonds
- Topic: Polar and Non-polar Covalent bonds
- Replies: 4
- Views: 640
Re: Polar and Non-polar Covalent bonds
A polar bond is a bond between two atoms with different electronegativity
a non-polar bond is between two atoms with similar electronegativity
a non-polar bond is between two atoms with similar electronegativity
- Tue Oct 16, 2018 7:43 pm
- Forum: Einstein Equation
- Topic: Calculating Frequency of Light
- Replies: 3
- Views: 440
Re: Calculating Frequency of Light
I think it's because the energy that is released is released as electromagnetic radiation, which should be positive..
- Tue Oct 16, 2018 7:39 pm
- Forum: DeBroglie Equation
- Topic: Formulas
- Replies: 5
- Views: 531
Re: Formulas
No need to memorize, they'll be provided. If you do want to remember them, focus on memorizing their derivations
- Fri Oct 05, 2018 6:09 pm
- Forum: Significant Figures
- Topic: sig figs urgent question!
- Replies: 12
- Views: 2212
Re: sig figs urgent question!
It would have 4 sig figs because the zeros are "embedded zeros" which are always significant.