Search found 50 matches
- Sun Dec 08, 2019 4:06 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: LDF
- Replies: 4
- Views: 435
LDF
Do all molecules have LDF? And when can I tell if a molecule has dipole-induced dipole?
- Sun Dec 08, 2019 4:03 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Hydrogen
- Replies: 3
- Views: 316
Hydrogen
How can we count the number of bonding sites on a molecule. (do we include lone pairs?)
- Sun Dec 08, 2019 3:50 am
- Forum: Quantum Numbers and The H-Atom
- Topic: msub l
- Replies: 1
- Views: 249
msub l
if we are supposed to give the quantum number for msub l, can we choose any number as long as it is in between -l and l?
- Sun Dec 08, 2019 3:37 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty
- Replies: 1
- Views: 244
Uncertainty
Will delta X always be given (whether it be through diameter or plus/minus some number)
- Sun Dec 08, 2019 3:31 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Uncertainty
- Replies: 7
- Views: 831
Uncertainty
Are Uncertainty and Indeterminacy the same thing in this equation?
- Sun Dec 08, 2019 3:08 am
- Forum: DeBroglie Equation
- Topic: Velocity
- Replies: 13
- Views: 851
Re: Velocity
This is unreasonable because the fastest thing we know is light.
- Sun Dec 08, 2019 3:06 am
- Forum: DeBroglie Equation
- Topic: DeBroglie
- Replies: 2
- Views: 387
DeBroglie
Is the DeBroglie Equation only going to be used when mass or velocity is required?
- Sun Dec 08, 2019 3:04 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: strong acids and bases
- Replies: 1
- Views: 168
strong acids and bases
What are strong acids and bases that we should know for the test?
- Sun Dec 08, 2019 1:20 am
- Forum: Biological Examples
- Topic: EDTA
- Replies: 3
- Views: 345
EDTA
What is EDTA and what is it used for?
- Sun Dec 08, 2019 1:11 am
- Forum: Biological Examples
- Topic: Cisplatin
- Replies: 5
- Views: 504
Re: Cisplatin
In the cis- molecule, the Chlorines are on the same side so they are both able to bind to adjacent Guanines on a DNA strip. in transplatin the Cl will be on opposite side, so only one Cl will be able to bond with the Guanine.
- Sun Dec 08, 2019 1:07 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: chelating ligands [ENDORSED]
- Replies: 51
- Views: 95237
Re: chelating ligands [ENDORSED]
Sigma bonds have the ability to rotate already.
- Sun Dec 08, 2019 1:04 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Co3 2-
- Replies: 1
- Views: 277
Co3 2-
Why would CO3 2- be monodentate or bidentate when there are three oxygens with lone pairs to be bonding sites?
- Sun Dec 08, 2019 12:37 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand Polydentate
- Replies: 1
- Views: 237
Ligand Polydentate
How can I determine how many bonding sites a ligand has?
- Sun Dec 08, 2019 12:04 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Metallocene (sandwich) [ENDORSED]
- Replies: 1
- Views: 254
Metallocene (sandwich) [ENDORSED]
How will we know that a complex is "sandwiched," making the structure Metallocene? And will we need to know this for the test?
naming
I'm confused when to use -ate vs just stating the atom. E.g. Ferrate vs Iron.
- Sat Dec 07, 2019 10:30 pm
- Forum: Naming
- Topic: Numerical Prefixes
- Replies: 2
- Views: 178
Numerical Prefixes
When do we use di vs bis, tri vs tris, etc.?
- Sat Dec 07, 2019 10:16 pm
- Forum: Hybridization
- Topic: Steps
- Replies: 1
- Views: 255
Steps
What are the steps in figuring out the Hybridization of a molecule?
- Sat Dec 07, 2019 10:16 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 1
- Views: 228
Hybridization
Will hybridization always be the same depending on the electron density of the molecule?
- Sat Dec 07, 2019 10:14 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis vs Bronsted
- Replies: 7
- Views: 598
Lewis vs Bronsted
What is the difference between Lewis and Bronsted Acids and Bases
- Sat Dec 07, 2019 10:13 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong Acids and Bases
- Replies: 2
- Views: 279
Strong Acids and Bases
Should I just memorize all the strong acids and bases for the final
- Sat Dec 07, 2019 10:13 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong Acids and Bases
- Replies: 1
- Views: 266
Strong Acids and Bases
How do I know if something is a strong acid or a strong base?
- Mon Nov 18, 2019 2:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Second Discussion Test
- Replies: 9
- Views: 489
Re: Second Discussion Test
Test 2 covers all material since midterm up to and including the list below: • Use the Valence-Shell Electron-Pair Repulsion Model (VSEPR) to determine the shape of inorganic, organic, and small biological molecules, cations, and anions. • Use bond dipole moments and shape to determine if a molecule...
- Mon Nov 18, 2019 2:00 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Condition for pi bond
- Replies: 4
- Views: 291
Condition for pi bond
Can you form a pi bond without a sigma bond being present in the same molecule? Or will there also be a sigma bond if you have a pi bond?
- Mon Nov 18, 2019 1:56 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: pi bond
- Replies: 2
- Views: 202
pi bond
How can I distinguish a pi bond vs a sigma bond when they both require two orbitals and electrons to form?
- Mon Nov 18, 2019 1:55 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: sigma bond
- Replies: 11
- Views: 687
sigma bond
What is a sigma bond, and what does the s-s overlap, s-p overlap, and p-p overlap mean?
- Mon Nov 18, 2019 1:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: AXE notation
- Replies: 10
- Views: 615
Re: AXE notation
In AXE notation the A means the central atom, X represents an attached atom, and E represents a lone pair
- Mon Nov 18, 2019 1:29 pm
- Forum: Bond Lengths & Energies
- Topic: Test 2 Topics
- Replies: 40
- Views: 1989
Re: Test 2 Topics
Test 2 covers all material since midterm up to and including the list below: • Use the Valence-Shell Electron-Pair Repulsion Model (VSEPR) to determine the shape of inorganic, organic, and small biological molecules, cations, and anions. • Use bond dipole moments and shape to determine if a molecule...
- Mon Nov 18, 2019 1:27 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma and Pi Bonds
- Replies: 4
- Views: 318
Sigma and Pi Bonds
Will single bonds always be a sigma bond.
Double bond be a sigma bond and a pi bond.
Triple bond be a sigma bond plus 2 pi bonds?
Do these happen in all cases
Double bond be a sigma bond and a pi bond.
Triple bond be a sigma bond plus 2 pi bonds?
Do these happen in all cases
- Mon Nov 18, 2019 1:18 pm
- Forum: Dipole Moments
- Topic: Dipole moments
- Replies: 4
- Views: 294
Dipole moments
In which direction do you draw the dipole moments for the test. Towards the more negative partial charge or towards the more positive partial charge?
- Sun Oct 27, 2019 4:11 pm
- Forum: Resonance Structures
- Topic: Determining Resonance
- Replies: 3
- Views: 126
Re: Determining Resonance
The Lewis Structure with the formal charge closest to 0 is the most stable
- Sun Oct 27, 2019 4:05 pm
- Forum: Resonance Structures
- Topic: Resonance Structures
- Replies: 5
- Views: 207
Re: Resonance Structures
The Lewis Structure with the formal charge closest to 0 is the most stable and therefore the most accurate. Lavelle will go into more detail in next week's lectures, but you generally want to draw the most stable Lewis Structure.
- Sun Oct 27, 2019 3:19 pm
- Forum: Lewis Structures
- Topic: expanded-octet
- Replies: 4
- Views: 154
expanded-octet
I know Dr. Lavelle mentioned this in class, but why exactly are we allowed to use an expanded-octet?
- Sun Oct 27, 2019 3:14 pm
- Forum: Lewis Structures
- Topic: Lewis Structure
- Replies: 5
- Views: 164
Lewis Structure
In drawing the Lewis Structure for Sulfate, why is it more accurate to draw the structure with two double bonds than just lone pairs on each oxygen atom.
- Sun Oct 27, 2019 3:11 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 5
- Views: 313
Formal Charge
What would the Formal Charge equation be used for and what does each letter in the equation represent?
- Fri Oct 18, 2019 3:23 am
- Forum: Properties of Electrons
- Topic: electron
- Replies: 3
- Views: 256
electron
what are the constants revolving around the electron? E.g. Mass of electron, wavelength of electron, etc.
- Fri Oct 18, 2019 3:13 am
- Forum: *Shrodinger Equation
- Topic: Schrodinger Equation
- Replies: 3
- Views: 281
Schrodinger Equation
What is Schrodinger's equation and what will I be able to find using it? Also, what does Ψ mean as used in this equation?
- Fri Oct 18, 2019 3:11 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: quantum number n, l, m
- Replies: 13
- Views: 383
quantum number n, l, m
In class Dr. Lavelle said that a wave function that is a solution with quantum numbers n, l, m, is called an orbital. What do the n, l, and m mean exactly and how would I be able to calculate them
- Fri Oct 18, 2019 3:04 am
- Forum: Properties of Light
- Topic: Constants/equations
- Replies: 2
- Views: 139
Constants/equations
What constants and equations should we be able to know thoroughly?
- Fri Oct 18, 2019 2:58 am
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 29
- Views: 1376
Re: Speed of Light
The speed of light is a constant. It is 2.998 x 10^8 m/s
- Fri Oct 18, 2019 2:58 am
- Forum: Photoelectric Effect
- Topic: Speed of Light
- Replies: 29
- Views: 1376
Re: Speed of Light
The speed of light is a constant. It is 2.998 x 10^8 m/s
- Thu Oct 10, 2019 8:54 pm
- Forum: Significant Figures
- Topic: for test 1
- Replies: 3
- Views: 284
Re: for test 1
For the test, it is strictly important that you round to the correct number of sig figs. In order to make sure you round to the right number, you should look at the problem and use the least amount of sig figs presented in the question as the amount of sig figs in your answer. Presenting the incorre...
- Thu Oct 10, 2019 8:52 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: for test 1
- Replies: 14
- Views: 775
Re: for test 1
You should have a general understanding of what these terms mean, but you won't have to know them verbatim for the test. Understanding these terms also means you know how to apply them in a given question.
- Thu Oct 10, 2019 8:51 pm
- Forum: Limiting Reactant Calculations
- Topic: Finding Limiting Reactant
- Replies: 3
- Views: 338
Re: Finding Limiting Reactant
A limiting reactant is the reactant that gets consumed first in the reaction. In order to find it, you must convert each reactant into the number of moles and compare based on the mole ratios. Whichever reactant has the least number of moles is the limiting reactant
- Thu Oct 10, 2019 8:45 pm
- Forum: Significant Figures
- Topic: %Mass Composition
- Replies: 12
- Views: 703
Re: %Mass Composition
The first thing you should do is look at the question. It is important that you use the least number of sig figs presented in the question.
- Thu Oct 10, 2019 8:37 pm
- Forum: SI Units, Unit Conversions
- Topic: Angstrom
- Replies: 16
- Views: 747
Re: Angstrom
An angstrom is a unit of length equal to 10⁻¹⁰ m. Its symbol is Å.
- Thu Oct 03, 2019 10:06 pm
- Forum: SI Units, Unit Conversions
- Topic: When to use what units
- Replies: 5
- Views: 319
When to use what units
Is it okay if I use mL or mmol to find molarity/volume/moles, or do I have to convert those values to liters and moles?
- Thu Oct 03, 2019 10:04 pm
- Forum: SI Units, Unit Conversions
- Topic: 2.Mass Percentage and Decimal Rounding:
- Replies: 10
- Views: 420
Re: 2.Mass Percentage and Decimal Rounding:
Generally, you're going to want to round to the hundredths so that when you convert to grams you are precise to two decimals, which is usually sufficient for a chemical equation.
- Thu Oct 03, 2019 4:14 pm
- Forum: SI Units, Unit Conversions
- Topic: Clarification for SI Units
- Replies: 4
- Views: 218
Re: Clarification for SI Units
Dr. Lavelle also mentioned that Angstrom (Å) is often used in chemistry, which is equivalent to 10^(-10) m
- Wed Oct 02, 2019 8:53 am
- Forum: Significant Figures
- Topic: General Rules to Help with Sig Figs
- Replies: 18
- Views: 966
Re: General Rules to Help with Sig Figs
Generally, chemistry problems will require you to round at least to the hundredth. The more precise your answer is, generally the more significant figures you'll want in your answer. When doing calculations, it is common to at least round to the hundredth.
- Wed Oct 02, 2019 8:40 am
- Forum: Limiting Reactant Calculations
- Topic: Module example question [ENDORSED]
- Replies: 2
- Views: 140
Re: Module example question [ENDORSED]
After calculating the molar mass of the reactants, you're going to want to calculate the number of moles in each reactant. 100g/(molar mass). You'll then get 1.56 moles of CaC2 and 5.55 moles of H2O. if you look at the balanced equation CaC2 + 2H2O -> Ca + C2H2, you'll see that one mole of CaC2 and ...