Search found 32 matches

by Claire Guo 1B
Tue Dec 04, 2018 8:17 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Identifying Ligands
Replies: 2
Views: 89

Re: Identifying Ligands

A ligand is a lewis base attached to the central metal atom. It typically has at least one lone pair of electrons with which it bonds to the central atom by coordinate covalent bonds.
by Claire Guo 1B
Tue Dec 04, 2018 8:14 pm
Forum: General Science Questions
Topic: Chemistry Community [ENDORSED]
Replies: 7
Views: 248

Re: Chemistry Community [ENDORSED]

TA's wont be checking if we did three posts every week right? Because I think I have the 30 posts we need but some weeks I forgot and then caught up later.
by Claire Guo 1B
Tue Dec 04, 2018 8:05 pm
Forum: Naming
Topic: Writing formulas
Replies: 2
Views: 36

Re: Writing formulas

If there is more than one ligand you put the prefixes "di-, tri-, tetra-" before its name. However, do not order the ligands alphabetically by the prefixes- just by the ligand name itself. After writing the ligands, name the metal ion. If the ion is negatively charged, add "-ate"...
by Claire Guo 1B
Tue Dec 04, 2018 8:00 pm
Forum: Naming
Topic: Writing formulas
Replies: 2
Views: 36

Re: Writing formulas

Yes, they are named with their ligands alphabetically.
by Claire Guo 1B
Tue Dec 04, 2018 7:57 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: K
Replies: 3
Views: 52

K

What does K mean in terms of Kw, Ka, and Kb?
by Claire Guo 1B
Mon Nov 26, 2018 6:28 am
Forum: Hybridization
Topic: Double Bonds
Replies: 4
Views: 104

Re: Double Bonds

A sigma bond is formed by using an sp or sp2 hybrid orbital while pi bonds are formed using unhybridized p-orbitals
by Claire Guo 1B
Mon Nov 26, 2018 6:26 am
Forum: Hybridization
Topic: Hybridization with Lone Pairs
Replies: 4
Views: 73

Hybridization with Lone Pairs

If a molecule has a lone pair, like NH3, and is considered trigonal pyramidal, is the hybridization still sp3? like that for tetrahedral?
by Claire Guo 1B
Mon Nov 26, 2018 6:18 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar vs. Non-polar
Replies: 3
Views: 87

Re: Polar vs. Non-polar

All homonuclear diatomic molecules are nonpolar because the partial charges are equal and cancel out because the molecule is linear and the charges point in opposite directions. Polar molecules are the opposite (partial charges do not point in opposite directions and therefore do not cancel out).Thi...
by Claire Guo 1B
Mon Nov 26, 2018 6:12 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Radicals
Replies: 4
Views: 102

Re: Radicals

Even though radicals only have one unpaired valence electron, their single electron is also considered a region of high energy density and is treated like a lone pair in VSEPR.
by Claire Guo 1B
Mon Nov 26, 2018 6:09 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Organic Molecules
Replies: 4
Views: 79

Re: Organic Molecules

I believe you can just apply VSEPR regularly to organic molecules
by Claire Guo 1B
Mon Nov 26, 2018 6:06 am
Forum: Hybridization
Topic: Just Kind of Confused
Replies: 13
Views: 215

Just Kind of Confused

In the textbook, the hybrid orbitals are written sp, sp2, sp3, sp3d, and sp3d2 but the subject thing on chem community was sp, sp2, sp3, dsp3, and d2sp3 and I just got really confused. It probably isn't a really big deal, but I was wondering if the order matters?
by Claire Guo 1B
Sun Nov 11, 2018 4:59 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate Covalent Bond formation
Replies: 3
Views: 237

Coordinate Covalent Bond formation

How do coordinate covalent bonds form?
by Claire Guo 1B
Sun Nov 04, 2018 3:39 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm questions
Replies: 5
Views: 89

Midterm questions

How far in the textbook readings is the midterm testing up to?
by Claire Guo 1B
Sun Nov 04, 2018 3:36 pm
Forum: Lewis Structures
Topic: Exceptions to the Octet Rule
Replies: 4
Views: 63

Exceptions to the Octet Rule

What are some examples of elements in compounds that exemplify exceptions to the octet rule and the reasons behind them?
by Claire Guo 1B
Sun Nov 04, 2018 3:33 pm
Forum: Sigma & Pi Bonds
Topic: sigma and pi bonds
Replies: 2
Views: 82

sigma and pi bonds

Are sigma and pi bonds going to be on our midterm?
by Claire Guo 1B
Sun Oct 28, 2018 2:31 am
Forum: Resonance Structures
Topic: Resonance Structures [ENDORSED]
Replies: 1
Views: 600

Resonance Structures [ENDORSED]

Do resonance structures have the same chemical properties?
by Claire Guo 1B
Sun Oct 28, 2018 2:30 am
Forum: Lewis Structures
Topic: Lewis Structures in Ionic Bonds
Replies: 2
Views: 46

Lewis Structures in Ionic Bonds

Do we need to know how to draw Lewis Structures for compounds bonded with ionic bonds?
by Claire Guo 1B
Sun Oct 28, 2018 2:27 am
Forum: Ionic & Covalent Bonds
Topic: electronegativity and ionization energy [ENDORSED]
Replies: 4
Views: 96

electronegativity and ionization energy [ENDORSED]

What's the difference between electronegativity and ionization energy?
by Claire Guo 1B
Sun Oct 28, 2018 2:24 am
Forum: Ionic & Covalent Bonds
Topic: Valence electrons
Replies: 8
Views: 92

Re: Valence electrons

The number of electrons that can fit in each shell (n) is 2n^2. So the first shell can have 2, second can have 8, third can have 18, and so on.
by Claire Guo 1B
Sun Oct 28, 2018 2:19 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Valence shell and other electrons
Replies: 4
Views: 124

Re: Valence shell and other electrons

If an atom has a higher atomic number, (number of protons) then there will be more attraction of electrons to the nucleus because the nucleus is more positively charged. Therefore, electrons closer to the nucleus will have a greater effective nuclear charge because it is most attracted towards the n...
by Claire Guo 1B
Sun Oct 28, 2018 2:16 am
Forum: *Particle in a Box
Topic: Particle in a box
Replies: 2
Views: 235

Particle in a box

I read the textbook but I still can not understand the particle in a box phenomenon. Can someone explain it to me?
by Claire Guo 1B
Mon Oct 15, 2018 9:02 pm
Forum: Properties of Electrons
Topic: Detectable Electron Wavelength
Replies: 2
Views: 69

Detectable Electron Wavelength

What is the smallest wavelength an electron can have before it is no longer detectable?
by Claire Guo 1B
Mon Oct 15, 2018 8:55 pm
Forum: Einstein Equation
Topic: 6th ed. 33a
Replies: 2
Views: 42

6th ed. 33a

Is there any way to find the wavelength of the electron without using deBroglie's equation?
by Claire Guo 1B
Mon Oct 15, 2018 8:48 pm
Forum: Properties of Light
Topic: Characteristics of Light
Replies: 1
Views: 34

Re: Characteristics of Light

Light acts as a wave because it undergoes reflection, refraction, and diffraction. At the same time, it also acts as a particle as seen in the photoelectric effect. We consider light as photons, or packets, of energy in which one photon interacts with one electron. If light had only wave properties,...
by Claire Guo 1B
Tue Oct 09, 2018 12:46 am
Forum: Empirical & Molecular Formulas
Topic: Polyatomic Ions and Naming
Replies: 3
Views: 260

Polyatomic Ions and Naming

Do we need to know the names of all polyatomic ions and know how to write the chemical formula from the name? It's been a while since I took chem and I'm pretty rusty.
by Claire Guo 1B
Tue Oct 09, 2018 12:38 am
Forum: Properties of Light
Topic: 1.7.b. 6th edition
Replies: 1
Views: 38

1.7.b. 6th edition

I think the answer in the back of the book has a typo in it?? I got the wavelength to be 150 pm but the book says 150 nm. Did any of you get the same answer?
by Claire Guo 1B
Tue Oct 09, 2018 12:35 am
Forum: Properties of Light
Topic: 1.3.c 6th edition
Replies: 2
Views: 58

1.3.c 6th edition

Are frequency and change in electrical field directly related?
by Claire Guo 1B
Thu Oct 04, 2018 12:19 am
Forum: Molarity, Solutions, Dilutions
Topic: molarity conversion
Replies: 7
Views: 143

Re: molarity conversion

I think so. Molarity is the unit of concentration
by Claire Guo 1B
Thu Oct 04, 2018 12:17 am
Forum: Balancing Chemical Reactions
Topic: H19 (6th Edition) [ENDORSED]
Replies: 3
Views: 155

Re: H19 (6th Edition) [ENDORSED]

I believe that combustion involves a reaction between the given element and oxygen gas. So just add the Aspartame with O2 (g) and you should get carbon dioxide, liquid water, and nitrogen gas.
by Claire Guo 1B
Thu Oct 04, 2018 12:11 am
Forum: Limiting Reactant Calculations
Topic: Homework Questions [ENDORSED]
Replies: 4
Views: 100

Homework Questions [ENDORSED]

I did the homework last weekend so I didn't do any limiting reactant questions (I only did questions from E and F). When doing homework questions do we have to do seven from all sections or can most/all of them be from just one reading section?

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