Search found 30 matches

by daisyjimenezt
Fri Dec 07, 2018 3:20 pm
Forum: Lewis Acids & Bases
Topic: Brontsted and Lewis
Replies: 1
Views: 49

Re: Brontsted and Lewis

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
by daisyjimenezt
Wed Dec 05, 2018 2:29 pm
Forum: Amphoteric Compounds
Topic: amphoteric oxides
Replies: 3
Views: 95

Re: amphoteric oxides

kind of the band of metalloids
by daisyjimenezt
Mon Dec 03, 2018 9:57 pm
Forum: Lewis Acids & Bases
Topic: Identifying Lewis acid
Replies: 2
Views: 75

Re: Identifying Lewis acid

I think it is because Cl- has a high electron affinity
by daisyjimenezt
Wed Nov 28, 2018 2:38 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: TM charge
Replies: 4
Views: 91

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...
by daisyjimenezt
Mon Nov 26, 2018 4:47 pm
Forum: Hybridization
Topic: 4.73
Replies: 2
Views: 51

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??
by daisyjimenezt
Fri Nov 23, 2018 2:38 pm
Forum: Sigma & Pi Bonds
Topic: formation of pi bond
Replies: 6
Views: 157

Re: formation of pi bond

No, sigma first then pi. There can only be one sigma bond but mult pi bonds
by daisyjimenezt
Fri Nov 23, 2018 2:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity
Replies: 7
Views: 115

Polarity

Can someone explain how to draw dipole moments and how do they determine polarity?
by daisyjimenezt
Fri Nov 23, 2018 2:33 pm
Forum: Dipole Moments
Topic: Polarity
Replies: 9
Views: 134

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...
by daisyjimenezt
Fri Nov 23, 2018 2:29 pm
Forum: Hybridization
Topic: Hybridization Labeling
Replies: 5
Views: 108

Re: Hybridization Labeling

I think it shows what two atoms the sigma and pi bonds are between
by daisyjimenezt
Wed Nov 14, 2018 1:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 4
Views: 201

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
by daisyjimenezt
Wed Nov 14, 2018 1:39 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Electron density
Replies: 6
Views: 111

Re: Electron density

Yes, only the central atom
by daisyjimenezt
Tue Nov 13, 2018 2:28 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar vs. NonPolar
Replies: 5
Views: 107

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.
by daisyjimenezt
Sat Nov 10, 2018 11:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: molecular shape
Replies: 3
Views: 122

molecular shape

does anyone know how many different molecular shapes we will need to memorize?
by daisyjimenezt
Sat Nov 10, 2018 11:15 pm
Forum: Octet Exceptions
Topic: octet exceptions
Replies: 4
Views: 119

Re: octet exceptions

they can have d states which allows for an expanded octet
by daisyjimenezt
Sat Nov 10, 2018 11:11 pm
Forum: Student Social/Study Group
Topic: curve?
Replies: 20
Views: 876

Re: curve?

there is no curve i believe
by daisyjimenezt
Sat Nov 10, 2018 11:09 pm
Forum: Dipole Moments
Topic: Polarity and Dipole moments
Replies: 2
Views: 78

Re: Polarity and Dipole moments

Dipole moment generally decides the polarity of a molecule.
by daisyjimenezt
Sat Nov 10, 2018 11:07 pm
Forum: Student Social/Study Group
Topic: Sig Figs on Midterm
Replies: 13
Views: 473

Re: Sig Figs on Midterm

Always answer in significant figures to get used to it
by daisyjimenezt
Sat Nov 10, 2018 11:04 pm
Forum: Ionic & Covalent Bonds
Topic: inter/intramolecular bond strength
Replies: 1
Views: 148

inter/intramolecular bond strength

are there any exceptions to which bonds are stronger than others? (ie: this hydrogen bond is not as strong etc)
by daisyjimenezt
Sat Nov 10, 2018 10:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: trigonal pyramidal
Replies: 3
Views: 59

trigonal pyramidal

can someone explain why trigonal pyramidal is the best shape to get the atoms the farthest away from each other?
by daisyjimenezt
Sat Nov 10, 2018 10:55 pm
Forum: Dipole Moments
Topic: Hydrogen Bonds
Replies: 20
Views: 253

Re: Hydrogen Bonds

hydrogen bonds are the strongest bonds between molecules
by daisyjimenezt
Sat Nov 10, 2018 10:54 pm
Forum: Ionic & Covalent Bonds
Topic: delta positive delta negative
Replies: 15
Views: 340

Re: delta positive delta negative

i believe the electron acceptor is delta negative and the donor is delta positive
by daisyjimenezt
Sat Nov 10, 2018 10:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 1
Views: 35

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
by daisyjimenezt
Sat Nov 10, 2018 10:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 2
Views: 50

Re: Molecular Shape

No. An example of this is hydrogen cyanide
by daisyjimenezt
Sat Nov 10, 2018 10:48 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent vs Hydrogen bond in H20
Replies: 4
Views: 85

Re: Covalent vs Hydrogen bond in H20

The bonds are covalent but two h2o molecules are bonded through hydrogen bonds
by daisyjimenezt
Sat Nov 10, 2018 4:12 pm
Forum: Ionic & Covalent Bonds
Topic: Iconic v Covalent Strength
Replies: 4
Views: 75

Iconic v Covalent Strength

Why are ionic bonds stronger than covalent?
by daisyjimenezt
Sat Nov 03, 2018 12:10 pm
Forum: Ionic & Covalent Bonds
Topic: Electronegativity Difference
Replies: 6
Views: 89

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.
by daisyjimenezt
Fri Oct 26, 2018 3:51 pm
Forum: Ionic & Covalent Bonds
Topic: Polar and Non-polar Covalent bonds
Replies: 4
Views: 185

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
by daisyjimenezt
Tue Oct 16, 2018 7:43 pm
Forum: Einstein Equation
Topic: Calculating Frequency of Light
Replies: 3
Views: 85

Re: Calculating Frequency of Light

I think it's because the energy that is released is released as electromagnetic radiation, which should be positive..
by daisyjimenezt
Tue Oct 16, 2018 7:39 pm
Forum: DeBroglie Equation
Topic: Formulas
Replies: 5
Views: 87

Re: Formulas

No need to memorize, they'll be provided. If you do want to remember them, focus on memorizing their derivations
by daisyjimenezt
Fri Oct 05, 2018 6:09 pm
Forum: Significant Figures
Topic: sig figs urgent question!
Replies: 12
Views: 546

Re: sig figs urgent question!

It would have 4 sig figs because the zeros are "embedded zeros" which are always significant.

Go to advanced search