CHEMISTRY COMMUNITY

Kyle Thorin

Do all molecules have LDF? And when can I tell if a molecule has dipole-induced dipole?

Kyle Thorin

How can we count the number of bonding sites on a molecule. (do we include lone pairs?)

Kyle Thorin

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?

Kyle Thorin

Will delta X always be given (whether it be through diameter or plus/minus some number)

Kyle Thorin

Are Uncertainty and Indeterminacy the same thing in this equation?

Kyle Thorin

This is unreasonable because the fastest thing we know is light.

Kyle Thorin

Is the DeBroglie Equation only going to be used when mass or velocity is required?

Kyle Thorin

What are strong acids and bases that we should know for the test?

Kyle Thorin

What is EDTA and what is it used for?

Kyle Thorin

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.

Kyle Thorin

Sigma bonds have the ability to rotate already.

Kyle Thorin

Why would CO3 2- be monodentate or bidentate when there are three oxygens with lone pairs to be bonding sites?

Kyle Thorin

How can I determine how many bonding sites a ligand has?

Kyle Thorin

How will we know that a complex is "sandwiched," making the structure Metallocene? And will we need to know this for the test?

Kyle Thorin

I'm confused when to use -ate vs just stating the atom. E.g. Ferrate vs Iron.

Kyle Thorin

When do we use di vs bis, tri vs tris, etc.?

Kyle Thorin

What are the steps in figuring out the Hybridization of a molecule?

Kyle Thorin

Will hybridization always be the same depending on the electron density of the molecule?

Kyle Thorin

What is the difference between Lewis and Bronsted Acids and Bases

Kyle Thorin

Should I just memorize all the strong acids and bases for the final

Kyle Thorin

How do I know if something is a strong acid or a strong base?

Kyle Thorin

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...

Kyle Thorin

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?

Kyle Thorin

How can I distinguish a pi bond vs a sigma bond when they both require two orbitals and electrons to form?

Kyle Thorin

What is a sigma bond, and what does the s-s overlap, s-p overlap, and p-p overlap mean?

Kyle Thorin

In AXE notation the A means the central atom, X represents an attached atom, and E represents a lone pair

Kyle Thorin

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...

Kyle Thorin

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

Kyle Thorin

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?

Kyle Thorin

The Lewis Structure with the formal charge closest to 0 is the most stable

Kyle Thorin

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.

Kyle Thorin

I know Dr. Lavelle mentioned this in class, but why exactly are we allowed to use an expanded-octet?

Kyle Thorin

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.

Kyle Thorin

What would the Formal Charge equation be used for and what does each letter in the equation represent?

Kyle Thorin

what are the constants revolving around the electron? E.g. Mass of electron, wavelength of electron, etc.

Kyle Thorin

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?

Kyle Thorin

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

Kyle Thorin

What constants and equations should we be able to know thoroughly?

Kyle Thorin

The speed of light is a constant. It is 2.998 x 10^8 m/s

Kyle Thorin

The speed of light is a constant. It is 2.998 x 10^8 m/s

Kyle Thorin

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...

Kyle Thorin

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.

Kyle Thorin

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

Kyle Thorin

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.

Kyle Thorin

An angstrom is a unit of length equal to 10⁻¹⁰ m. Its symbol is Å.

Kyle Thorin

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?

Kyle Thorin

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.

Kyle Thorin

Dr. Lavelle also mentioned that Angstrom (Å) is often used in chemistry, which is equivalent to 10^(-10) m

Kyle Thorin

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.

Kyle Thorin

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 ...

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