Search found 13 matches

by Raymond Zhang 3H
Sat Dec 09, 2017 1:22 pm
Forum: Hybridization
Topic: Chemical reasoning for hybridization
Replies: 2
Views: 164

Re: Chemical reasoning for hybridization

I can tell what kind of hybridization an atom has, but I don't understand the chemical reasoning behind hybridization. Hybridization occurs because the electron orbitals "fill up" with two in each orbital, then cannot form bonds. When hybridization occurs, an electron from an already fill...
by Raymond Zhang 3H
Sat Dec 09, 2017 12:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity of CBr2Cl2
Replies: 2
Views: 956

Re: Polarity of CBr2Cl2

When drawing out the lewis structure of CBr2Cl2, I drew as tetrahedral and completed an octet for the chlorine and bromine atoms. However this molecule is polar since that the dipoles don't cancel. Why is this? Why won't the dipoles cancel? In tetrahedral structures, there are four "legs"...
by Raymond Zhang 3H
Sat Dec 09, 2017 12:51 pm
Forum: *Titrations & Titration Calculations
Topic: ICE Calculations
Replies: 2
Views: 584

Re: ICE Calculations

It would be -2X, not X2
by Raymond Zhang 3H
Fri Dec 01, 2017 7:54 pm
Forum: Ideal Gases
Topic: Units for the formula
Replies: 4
Views: 387

Re: Units for the formula

204918982 wrote:What does the R stand for again?


R is the gas constant, 8.314 J / mol. K
by Raymond Zhang 3H
Sun Nov 26, 2017 11:34 pm
Forum: Ideal Gases
Topic: solving 11.7
Replies: 2
Views: 180

Re: solving 11.7

It's basically just counting molecules in the flasks. You'll also need that for part B of the question where you find percentage decomposed.
by Raymond Zhang 3H
Sun Nov 26, 2017 10:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.31 and 11.33
Replies: 2
Views: 152

Re: 11.31 and 11.33

I think it should be Q<K for both of them as well. Are you sure it's not a misprint or something?
by Raymond Zhang 3H
Fri Nov 17, 2017 11:15 pm
Forum: Hybridization
Topic: Chelate
Replies: 2
Views: 169

Re: Chelate

So a ligand is something that attaches to a central metal atom in a molecule, it can be either an atom or a molecule. When it is a chelating ligand, the ligand bonds with the metal more than once (usually not directly). It's kind of like forming a ring that's connected to the metal atom.
by Raymond Zhang 3H
Thu Nov 16, 2017 1:44 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle
Replies: 7
Views: 309

Re: Bond Angle

I believe you're supposed to do it based on repulsion forces from electrons. Don't quote me on that though.
by Raymond Zhang 3H
Wed Nov 08, 2017 7:24 pm
Forum: Lewis Structures
Topic: HW 3.103
Replies: 1
Views: 138

HW 3.103

I'm a bit confused as to how to make the C6H4O22- anion, and what it should look like. Thanks for the help.
by Raymond Zhang 3H
Wed Nov 08, 2017 1:48 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic and Covalent Bonds
Replies: 9
Views: 377

Re: Ionic and Covalent Bonds

Ionic bonds have one atom "donating" an electron to another atom. This creates an anion and a cation that are held together by electronegativity, by how their differing charges attract, a relatively weak bond. This also causes them to usually form crystalline structures and be soluble in w...
by Raymond Zhang 3H
Wed Nov 08, 2017 1:29 pm
Forum: Ionic & Covalent Bonds
Topic: 3.25
Replies: 3
Views: 196

Re: 3.25

For example, Magnesium Arsenide, part a, has magnesium, which is in group 2, and Arsenic, which is in group 15. Magnesium needs to lose 2 electrons to get to the configuration of Neon, while Arsenic needs to gain 3 to get to Krypton configuration. So it's Mg 3 As 2 , with 6 electrons "given&quo...
by Raymond Zhang 3H
Fri Nov 03, 2017 11:10 am
Forum: Lewis Structures
Topic: 3.59
Replies: 3
Views: 219

Re: 3.59

Adding to that, for example Oxygen, being number 6, needs 2 additional electrons to have a full shell of 8. Thus, when paired with another Oxygen, they form a double bond to both have 8 electrons.
by Raymond Zhang 3H
Fri Nov 03, 2017 11:05 am
Forum: Ionic & Covalent Bonds
Topic: Metallic Bond
Replies: 4
Views: 239

Re: Metallic Bond

I think the "sea of electrons" is also why metals tend to be so conductive.

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