CHEMISTRY COMMUNITY

DavidTabib 3H

Delta E is zero when the reaction reaches equilibrium

DavidTabib 3H

The strongest reducing metal is the one with the lowest reduction potential

DavidTabib 3H

I believe that you cab assume all solids to be a conductive source as well as liquid mercury. Platinum is used if one side of the galvanic cell is lacking a solid.

DavidTabib 3H

The number of electrons that cancel out in the half-reactions when making the overall reaction is the value of n.

DavidTabib 3H

Solids are always on the outside of the cell diagram and everything is reversed when E is less than 0.

DavidTabib 3H

With both H and S positive, the sign of G is dependent on the temperature. At high temps, the G is negative and at low temps, G is positive.

DavidTabib 3H

Yes, they are directly related. No change in volume means no work done.

DavidTabib 3H

You add them up after finding the enthalpy for each bond.

DavidTabib 3H

You add them up after finding the enthalpy for each bond.

DavidTabib 3H

The molar heat capacity involves the number of moles, but the specific heat capacity refers to the mass (grams).

DavidTabib 3H

They are the same thing

DavidTabib 3H

They are applicable to different versions of the same equation.

DavidTabib 3H

Whenvever an oxygen is needed on one side, I add OH in a basic solution and H+ in an acidic

DavidTabib 3H

It is used to calculate the concentration of H+

DavidTabib 3H

Yes, you need to flip the anode reaction typically.

DavidTabib 3H

E (cell potential) value is 0 at equilibrium not E naught

DavidTabib 3H

It refers to a negative Gibbs free energy value.

DavidTabib 3H

The reverse of a reaction is flipping the reactants and the products.

DavidTabib 3H

Cv is used when the volume is constant and Cp is used when the pressure is constant. The value for Cp and Cv for monotonic molecules are 5/2R and 3/2R, respectively.

DavidTabib 3H

The term exergonic refers to reactions that have a negative delta G, so yes.

DavidTabib 3H

As volume decreases, pressure tends to increase due to their inversely related relationship.

DavidTabib 3H

Whenever volume is constant in the question, Cv is what you use. When the pressure is constant, Cp is what you should use in the question.

DavidTabib 3H

I always look at the units and go from there. When there are liters and atm, the 8.206 x 10^-2 is teh correct R.

DavidTabib 3H

I always just add 273 to Celcius and never have a problem, however, adding 273.15 is more accurate.

DavidTabib 3H

When it is G°, the conditions are standard (1 atm and 298 K)

DavidTabib 3H

A closed system allows for heat to be transferred, whereas an isolated system does not allow for heat or matter to be added to it.

DavidTabib 3H

I believe it can occur at both, dependent on the system.

DavidTabib 3H

Being a closed system means that no matter can go in and out, therefore the volume does not change.

DavidTabib 3H

It depends on the units that are given with the heat capacity.

DavidTabib 3H

Delta U is the change in internal energy

DavidTabib 3H

You should always look at the units in the problem and choose the R constant from there

DavidTabib 3H

It releases more energy for water to go from vapor to liquid form, causing more severe burns

DavidTabib 3H

Delta U is the total amount of energy, but delta H refers to the amount of work.

DavidTabib 3H

Pretty sure that you don't need to memorize anything.

DavidTabib 3H

Since enthalpy is a state function, it is additive.

DavidTabib 3H

You can just change between them by adding 273 to the Celius value.

DavidTabib 3H

I use a quadratic root finder online to check my work.

DavidTabib 3H

It doesnt react with the reactants or products.

DavidTabib 3H

The larger the Ka, the stronger the acid.

DavidTabib 3H

You're good to approx. when the K value is 10^-4 or smaller

DavidTabib 3H

Use the Ice method and the Ka value from the equations

DavidTabib 3H

The ICE box works in that context as well.

DavidTabib 3H

It shifts to the reactants in order to restore equilibrium

DavidTabib 3H

You should test both values of x.

DavidTabib 3H

Le Chatelier's principle describes how a reaction maintains balance and equilibrium, by either shifting toward the reactants or products.

DavidTabib 3H

I agree with the above posts, they are proportional to one another.

DavidTabib 3H

The moles of the solids and liquids do not count.

DavidTabib 3H

The delta H says where the reaction is endothermic or exothermic

DavidTabib 3H

The safest bet is when K is less than 10^-4

DavidTabib 3H

When it comes to strong acids and bases, the ICE box method is not really needed. Instead, a ratio is more useful since they fully dissociate.

DavidTabib 3H

The H2O molecules are in excess which results in their effect being negligible.

DavidTabib 3H

Anything that can lose or add an H+ is considered amphoteric, such as H20.

DavidTabib 3H

H3PO4 since the extra oxygen provides more electronegativity, which pulls the electrons even further away from the electron.

DavidTabib 3H

Hard water is alkaline whereas soft water is acidic.

DavidTabib 3H

That picture shows the concept really clearly. Thank you.

DavidTabib 3H

Co is within the vitamin itself.

DavidTabib 3H

Yes, an alkaline solution is a basic one.

DavidTabib 3H

All Bronsted acids are Lewis acids and all Bronsted bases are Lewis bases, but not the opposite way.

DavidTabib 3H

pKa is the negative log of Ka

DavidTabib 3H

The lower the pH, the stronger the acid.

DavidTabib 3H

Since F has a high electronegativity, the F pulls the electron tight and makes it a weak acid.

DavidTabib 3H

A Lewis acid accepts electron pairs, but a Bronsted acid donates a proton

DavidTabib 3H

The longer the bond, the stronger the acid.

DavidTabib 3H

Since it has a negative charge it is not radical.

DavidTabib 3H

It is not just limited to Group 13.

DavidTabib 3H

No, it looks the same as a normal bond.

DavidTabib 3H

Any atom that binds with a transition metal is considered a ligand.

DavidTabib 3H

Since lone pairs occupy more volume, they cause more repulsion.

DavidTabib 3H

Quizlet has really helped me, I recommend it!

DavidTabib 3H

Yes, they are also their own region of electron density.

DavidTabib 3H

Repulsion of a lone pair results in the bending of the two bonds which are no longer 90 degrees.

DavidTabib 3H

Pretty sure spectroscopy is used but we don't need to find it ourselves for the class.

DavidTabib 3H

Lone pairs result in repulsion which causes it to not be linear.

DavidTabib 3H

Since it is an ionic bond, they will need to be drawn separately.

DavidTabib 3H

Only one of the H needs to be attached to a NOF element.

DavidTabib 3H

Everything just said was really helpful. Basically, the bigger anions will have greater polarizability.

DavidTabib 3H

Ya, I was confused too because of the trends, but this makes sense. Thank you!

DavidTabib 3H

They are experimentally found so we don't need to find it ourselves.

DavidTabib 3H

P, S, and Cl are elements that are able to have an expanded octet

DavidTabib 3H

A coordinate covalent bond is when both electrons in a bond come from the same atom.

DavidTabib 3H

I believe that they would have more energy since they are less tightly held by an atom.

DavidTabib 3H

Resonance structures are used when more than one structure can represent the same molecule. Also makes it more stable

DavidTabib 3H

That video really cleared thing sup. Thank you. I find that doing more problems helps solidify my understanding and memorization of these expectations.

DavidTabib 3H

Do we need to know VSEPR shapes and IMF for the exam?

DavidTabib 3H

Yes, you are correct

DavidTabib 3H

Do we need to know the differences between using a ring or a chain on the exam?

DavidTabib 3H

Are there any exceptions to this?

DavidTabib 3H

When the electronegativity is stronger, the bond length gets shorter.

DavidTabib 3H

We need to print out the formula sheet that has the constants on it.

DavidTabib 3H

Thanks for the help guys, this makes sense now!

DavidTabib 3H

I am also sure that covalent bonds are the strongest types of bonds

DavidTabib 3H

Salts are produced from a cation and an anion.

DavidTabib 3H

I don't think its a huge deal and the midterm is likely multiple choice, which means the answer choices will show you what to convert to.

DavidTabib 3H

Thanks so much, I feel like just having the equations available during the test will be a big help.

DavidTabib 3H

Thank you so much. This answered my question as well!

DavidTabib 3H

I'm in a similar place since I haven't taken chemistry in the past 3 years. I find that youtube videos, such as Crash Course, also help me refresh and understand the concepts that may be difficult.

DavidTabib 3H

Hi Nicolette!
I find that studying with a set plan allows me to prioritize the material I review and makes sure I use my time effectively. Best of luck studying!

DavidTabib 3H

Thanks so much Kayla. That really helped

DavidTabib 3H

Dr. Lavelle is really good on reviewing fundamentals before learning anything more advanced so I think you should be fine without too much review

DavidTabib 3H

These resources really helped me. Thank you so much. Great to review with :)

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