Search found 44 matches

by BCaballero_3A
Sat Nov 30, 2019 12:02 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Lewis Acid/Base
Replies: 5
Views: 22

Re: Lewis Acid/Base

Lewis acids accept electrons and Lewis bases donate electrons
by BCaballero_3A
Fri Nov 29, 2019 11:57 pm
Forum: Calculating the pH of Salt Solutions
Topic: pH vs. pOH
Replies: 17
Views: 89

Re: pH vs. pOH

pH measures acidity while pOH measures basicity, and you can use one to get the other
by BCaballero_3A
Fri Nov 29, 2019 11:52 pm
Forum: Resonance Structures
Topic: What is a Resonance "Structure"
Replies: 12
Views: 52

Re: What is a Resonance "Structure"

The different forms of a molecule because there can be more than one
by BCaballero_3A
Fri Nov 29, 2019 11:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Lewis bases vs. ligands
Replies: 3
Views: 19

Re: Lewis bases vs. ligands

Yes all ligands are basically Lewis bases
by BCaballero_3A
Fri Nov 29, 2019 11:46 pm
Forum: Conjugate Acids & Bases
Topic: NH3, acid or base?
Replies: 12
Views: 370

Re: NH3, acid or base?

In most cases Ammonia is considered a weak base
by BCaballero_3A
Mon Nov 18, 2019 11:46 pm
Forum: Hybridization
Topic: Pi and sigma bonds
Replies: 4
Views: 39

Re: Pi and sigma bonds

Because a sigma bond is stronger and more stable so there will be one of these, and pi bonds would come after the sigma bond because they are weaker.
by BCaballero_3A
Mon Nov 18, 2019 11:44 pm
Forum: Hybridization
Topic: Energy in Hybridization
Replies: 3
Views: 23

Re: Energy in Hybridization

The energy of the hybridized molecule is an average of the beginning two.
by BCaballero_3A
Mon Nov 18, 2019 11:42 pm
Forum: Hybridization
Topic: hybridization
Replies: 4
Views: 19

Re: hybridization

To explain bonds more thoroughly
by BCaballero_3A
Mon Nov 18, 2019 11:42 pm
Forum: Hybridization
Topic: hybridization
Replies: 11
Views: 50

Re: hybridization

You begin with the Lewis Structure which then allows you to use VSEPR to predict the shape, and from these two you should know the number of regions of electron density which would then allow you to derive the hybridization.
by BCaballero_3A
Mon Nov 18, 2019 11:39 pm
Forum: Hybridization
Topic: Hybridization
Replies: 6
Views: 27

Re: Hybridization

005384106 wrote:Does hybridization depend on the number of bonds between atoms?

The number of hybrid orbitals depends on the number of regions of electron density.
by BCaballero_3A
Tue Nov 12, 2019 5:56 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: central atoms
Replies: 7
Views: 33

Re: central atoms

Cl is the central atom because it allows for stability
by BCaballero_3A
Tue Nov 12, 2019 5:55 pm
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 6
Views: 279

Re: Hybrid Orbitals

Yes, but only sp3 + it corresponds with electron densities
by BCaballero_3A
Tue Nov 12, 2019 5:52 pm
Forum: Hybridization
Topic: Pi vs Sigma Bonds
Replies: 4
Views: 38

Re: Pi vs Sigma Bonds

The electrons in sigma bonds are very close to the nuclei, while the electrons in a pi bond are further from the nuclei so the attraction is not as strong, thus making them easier to break.
by BCaballero_3A
Tue Nov 12, 2019 5:40 pm
Forum: Hybridization
Topic: Determining how many electron densities
Replies: 5
Views: 173

Re: Determining how many electron densities

Yes they do count, so for this example it would be 4 instead of 3.
by BCaballero_3A
Tue Nov 12, 2019 5:39 pm
Forum: Hybridization
Topic: Hybridization Models
Replies: 4
Views: 36

Re: Hybridization Models

I believe we will need to know how to draw them but I am not sure, regardless it would be beneficial.
by BCaballero_3A
Sun Nov 10, 2019 4:40 pm
Forum: Octet Exceptions
Topic: Octet Exception
Replies: 8
Views: 54

Re: Octet Exception

I believe the f-block can store electrons too since the octet exception applies to those after the third period.
by BCaballero_3A
Sun Nov 10, 2019 4:37 pm
Forum: Hybridization
Topic: Noble Configuration vs. Full
Replies: 7
Views: 40

Re: Noble Configuration vs. Full

I believe it will be specified but if not the noble gas configuration should be sufficient.
by BCaballero_3A
Sun Nov 10, 2019 4:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Writing e- Configurations
Replies: 15
Views: 75

Re: Writing e- Configurations

Usually the question will specify whether they want the whole thing written out or not.
by BCaballero_3A
Sun Nov 10, 2019 4:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar v. Nonpolar
Replies: 11
Views: 286

Re: Polar v. Nonpolar

If electrons are shared equally, it is nonpolar. If electrons are shared unequally, it is polar, which you should be able to see once you calculate formal charge.
by BCaballero_3A
Sun Nov 10, 2019 4:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Formal Charge
Replies: 9
Views: 456

Re: Formal Charge

The most electronegative atom should have the negative charge, I think it does matter what the formal charges are on individuals which would then lead to the correct charge for the overall structure.
by BCaballero_3A
Wed Oct 30, 2019 6:36 pm
Forum: Coordinate Covalent Bonds
Topic: Coordinate covalent bond?
Replies: 12
Views: 418

Re: Coordinate covalent bond?

A coordinate covalent bond is between an acid and a base where one acts and the lone electron donor and the other acts as the lone electron acceptor.
by BCaballero_3A
Wed Oct 30, 2019 6:33 pm
Forum: Ionic & Covalent Bonds
Topic: Format of midterm?
Replies: 12
Views: 61

Re: Format of midterm?

I think the midterm will be all free-response because all of the practice problems given usually are as well.
by BCaballero_3A
Wed Oct 30, 2019 6:30 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 5
Views: 31

Re: Resonance Structures

Yes, the most stable structure will make it the most accurate so it is the one you should draw.
by BCaballero_3A
Wed Oct 30, 2019 6:27 pm
Forum: Lewis Structures
Topic: Valence Electrons from Periodic Table
Replies: 10
Views: 71

Re: Valence Electrons from Periodic Table

You get the number of valence electrons from whatever group the element is in.
by BCaballero_3A
Wed Oct 30, 2019 6:25 pm
Forum: Lewis Structures
Topic: Formal charge
Replies: 9
Views: 58

Re: Formal charge

I would recommend counting the formal charge so you have the most similar structure to what the real structure looks like.
by BCaballero_3A
Wed Oct 30, 2019 6:21 pm
Forum: Octet Exceptions
Topic: octet exceptions
Replies: 5
Views: 31

Re: octet exceptions

It may also help to understand that second row electrons can only have an octet due and count the electrons up to the 2nd row (1s^2,2s^2,2p^6) and if they are in a different row such as the third row they can take e- from the d subshell.
by BCaballero_3A
Wed Oct 30, 2019 6:16 pm
Forum: Lewis Structures
Topic: Creating Lewis Structures
Replies: 7
Views: 50

Re: Creating Lewis Structures

You would put the atom that is the least electronegative or has the lowest ionization energy in the middle.
by BCaballero_3A
Wed Oct 30, 2019 6:15 pm
Forum: Hybridization
Topic: Electrons
Replies: 13
Views: 348

Re: Electrons

It means it is moving to the next orbital because it is excited.
by BCaballero_3A
Wed Oct 30, 2019 6:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structure
Replies: 5
Views: 60

Re: Lewis Structure

If the negative is referring to the charge then yes you would add an electron for every negative shown and subtract an electron for every positive shown when referring to charge.
by BCaballero_3A
Tue Oct 22, 2019 12:09 pm
Forum: Trends in The Periodic Table
Topic: Ionic Radii
Replies: 10
Views: 54

Re: Ionic Radii

Anions are bigger because an electron is added. Cations are smaller because a valence electron is lost.
by BCaballero_3A
Tue Oct 22, 2019 12:03 pm
Forum: Ionic & Covalent Bonds
Topic: Week 4 Homework
Replies: 9
Views: 91

Re: Week 4 Homework

I don't think you will be penalized for moving on from Quantum World if you wanted to.
by BCaballero_3A
Tue Oct 22, 2019 11:59 am
Forum: Lewis Structures
Topic: Molecule Formulas
Replies: 5
Views: 317

Re: Molecule Formulas

For the most part I think it will be given unless it is simple for us to figure out.
by BCaballero_3A
Tue Oct 22, 2019 11:57 am
Forum: Lewis Structures
Topic: Drawing lewis structures
Replies: 5
Views: 271

Re: Drawing lewis structures

As long as the overall charge is accurate and the formal charge is matched then you should be fine.
by BCaballero_3A
Tue Oct 22, 2019 11:49 am
Forum: Lewis Structures
Topic: Central Atom
Replies: 7
Views: 262

Re: Central Atom

The central atom has to be the atom with the lowest ionization energy, so I think those can be in the middle if they have a lower ionization energy than other atoms involved.
by BCaballero_3A
Tue Oct 15, 2019 6:46 pm
Forum: *Shrodinger Equation
Topic: What is Shrodinger's for?
Replies: 6
Views: 43

Re: What is Shrodinger's for?

Schrodinger's uses a function to describe an e- in an atom and uses the concept that an e- with wavelike properties and indeterminacy in momentum and position can be described by a wave function.
by BCaballero_3A
Tue Oct 15, 2019 6:37 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 16
Views: 120

Re: Atomic Radius

The electron has to be in ground state for the radius to be measured properly, not excited.
by BCaballero_3A
Tue Oct 15, 2019 6:35 pm
Forum: Trends in The Periodic Table
Topic: Chemistry Community
Replies: 8
Views: 73

Re: Chemistry Community

They are due by Sunday, Professor Lavelle explained in an email how when discussing Chemistry Community the week "ends" on Sunday.
by BCaballero_3A
Tue Oct 15, 2019 6:32 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation
Replies: 17
Views: 83

Re: De Broglie's Equation

Light does not have mass, which is a required variable in the De Broglie equation.
by BCaballero_3A
Thu Oct 10, 2019 3:21 pm
Forum: General Science Questions
Topic: Rusty on High School Chem [ENDORSED]
Replies: 168
Views: 101647

Re: Rusty on High School Chem [ENDORSED]

Definitely take advantage of all the tutoring they offer and practice as much as you can, YouTube also helps a lot.
by BCaballero_3A
Thu Oct 10, 2019 3:15 pm
Forum: Balancing Chemical Reactions
Topic: Combustion
Replies: 17
Views: 156

Re: Combustion

Combustion consists of burning, usually O^2 reacts with something else and CO^2 and H^2O are products.
by BCaballero_3A
Thu Oct 10, 2019 3:13 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Chemical Reactions
Replies: 20
Views: 148

Re: Balancing Chemical Reactions

I find it helpful to list the elements on both sides (under reactants and products) and then plug in numbers that look correct and update the numbers as I go by crossing them out and putting the new ones.
by BCaballero_3A
Thu Oct 10, 2019 3:09 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 1405

Re: Rydberg equation [ENDORSED]

You would use the Rydberg equation to calculate the wavelength of light when an electron moves energy levels.
by BCaballero_3A
Thu Oct 10, 2019 3:04 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 68
Views: 1315

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]

Yes, however I think it is best to show work so that in case you make a mistake you may receive partial credit.

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