CHEMISTRY COMMUNITY

Ryan Agcaoili 2E

I always try to find a way to distract myself by doing something you enjoy doing. Hope this helps!

Ryan Agcaoili 2E

Thank you Dr. Lavelle for everything you have taught for general chemistry and reminding us to exercise as well. Also thank you for facilitating an amazing student community founded on peer mentorship!

Ryan Agcaoili 2E

Usually results for exam come out after a week.

Ryan Agcaoili 2E

To add on, when a catalyst is added, the overall K value stays the same since the forward and reverse rates are equal.

Ryan Agcaoili 2E

I believe 14C is more involved in 14A material. I also recommend keeping notes from past classes because they can help give a refresher in the future.

Ryan Agcaoili 2E

I feel like the final is gonna be a bulk of chemistry because it was the biggest section.

Ryan Agcaoili 2E

The overall order of the reaction is the sum of all the orders of the reactants.

Ryan Agcaoili 2E

Based on my understanding, I believe sea water causes faster rusting because the salt contains ions that makes the water more highly conductive of electricity, which increases the rate of the rusting.

Ryan Agcaoili 2E

It is important to know the differing units for the gas constant R because it can differ depending on what the question is asking for.

Ryan Agcaoili 2E

To add onto what Mackenzie stated, finding the E naught of the cell can be done in two different methods. You can either find E naught by subtracting the E naught of cell = E naught (cathode) - E naught (anode). Another method is to flip one of the half reactions, and in this case you add both the a...

Ryan Agcaoili 2E

When computing the rate law with the concentrations of the reactions, the units will cancel out. Generally, a zero order reaction is in M/s, first order reaction is 1/s, and second order reaction is 1/M*s. If you forget the units, you can always compute the units.

Ryan Agcaoili 2E

To add on, it is important to balance the electrons in both half reactions, which will then be the n value.

Ryan Agcaoili 2E

As an inert electrode, platinum is not reactive. It is added if there is no available metal to transfer electrons.

Ryan Agcaoili 2E

By using the standard reduction potentials on the list, you use the values for Iron (II) solution, which is also rewritten as Fe^2+ and the standard reduction potential for copper (I), which is Cu^+. Whatever is the lowest standard reduction potential between the two, you flip the reaction and flip ...

Ryan Agcaoili 2E

STP, which is standard temperature and pressure, is 273.15K and 1 atm. Room temperature is 298K.

Ryan Agcaoili 2E

Will be there! This event will be a good destressor before finals!

Ryan Agcaoili 2E

You can use the van't hoff equation to solve for the equilibrium of a reaction at a different temperature. In addition, you can sole for any other variable in the equation.

Ryan Agcaoili 2E

Coefficients are independent from oxidation number. Coefficients are used to balance the equation, whereas oxidation number represents the number of electrons gained or lost in an atom.

Ryan Agcaoili 2E

When the system is doing work, work is negative. On the other hand, when the work is done on the system, work is positive.

Ryan Agcaoili 2E

I plan on running and eating ice cream to make myself feel better!

Ryan Agcaoili 2E

Thanks for this cool acronym! This is very helpful in oxidation and reduction problems.

Ryan Agcaoili 2E

This equation is used for reversible reactions since the pressure is always changing. Also, in graphical terms, the integral curves downwards, unlike a reversible expansion, which expands/compresses straight to the desired volume.

Hope this helps!

Ryan Agcaoili 2E

Bomb calorimeters are isolated systems, which do not exchange heat/matter with the surroundings.

Ryan Agcaoili 2E

Work done on the system or taking in energy will be positive work, while the system doing work or releases energy is negative work.

Ryan Agcaoili 2E

A good tip when deterining when to use which R constant is to look at the units. 8.314 J/K * mol is usually used for PV=nRT, while 0.08206 L*atm / K * mol when dealing with pressure.

Ryan Agcaoili 2E

Thank you for the tips! I also redo the problems that I had trouble on.

Ryan Agcaoili 2E

Heat of pressure is equal to delta H when there is constant pressure.

Ryan Agcaoili 2E

To piggy back off what other people said, I believe closed systems can only exchange energy between the system and its surroundings.

Ryan Agcaoili 2E

To memorize what an isothermal reaction, I remember that "isothermal" refers to constant temperature. That means that delta T is 0.

Ryan Agcaoili 2E

Depending on the TA, I think you should ask them just to make sure that you can get your points. But from last quarter, I know people who did not do it for one week still got their points.

Ryan Agcaoili 2E

The gas constant values are .08206 (L atm)/(mol K) and 8.314 J/(mol K). They both count as R, but make sure to remember the difference in using both of them. The first R value is used for problems dealing with ideal gas constant (so the equation PV = nRT). On the other hand, the second value is used...

Ryan Agcaoili 2E

Respondus will close all the applications on your desktop when you take the test.

Ryan Agcaoili 2E

It is important to remember that the p in pH is -log, so taking the anti-log is 10^x.

Ryan Agcaoili 2E

Inert/noble gases have no effect on the equilibrium, just like how catalysts do not.

Ryan Agcaoili 2E

If the value is smaller than 10^-4, then you can utilize approximation.

Ryan Agcaoili 2E

Neutralization is when an acid and base make a neutral solution.

Ryan Agcaoili 2E

During fall quarter for Chem 14A we received grades usually a week later.

Ryan Agcaoili 2E

It is important to do as much practice as possible because this midterm compared to 14A is more calculation based.

Ryan Agcaoili 2E

The way that I study for the midterm is to attend UA sessions and to get in as much practice as possible, whether it be through worksheets, textbook problems, and sapling problems.

Ryan Agcaoili 2E

An easy way to remember the difference is that "p" is also another way of saying "-log" of Ka.

Ryan Agcaoili 2E

State property is used to describe a quantity that only focuses on the final and initial, without regard to the "path" taken to get to the final value.

Ryan Agcaoili 2E

Make sure you also have the new updated constant/equations sheet for 14B as well!

Ryan Agcaoili 2E

One of my favorite activities to do to exercise my mind and bodies is to dance because I like to test my creativity while also working out my body.

Ryan Agcaoili 2E

To state, the inverse of Kc is basically the reciprocal of Kc.

Ryan Agcaoili 2E

I really wanted to post a chemistry joke, but I could not ZINC of one.

Ryan Agcaoili 2E

Initially, I think your reasoning is right by find the Kc value before the concentration of NO is modified. But after finding the Kc value, you have to keep the molar concentrations of both reactants. You have to keep in mind how adding the concentration of NO affects the equilibrium.

Ryan Agcaoili 2E

ICE table is applied to both reactions that deal with concentrations and partial pressure.

Ryan Agcaoili 2E

You cannot have negative molarity, so you choose the positive value that you get from the quadratic equation.

Ryan Agcaoili 2E

Some UAs encourage that they want students to come to their sessions or they can email it to you personally.

Ryan Agcaoili 2E

Mol is different from M because M is used to measure concentration in the units M * L^-1.

Ryan Agcaoili 2E

In response to Laura,
You access the Chem 14B homework under current courses (if you bought the course or use credit to get it).

Ryan Agcaoili 2E

These are all the reaction quotients but they apply to different units. Qc deals with molar concentration, so its (mol/L). Qp deals with partial pressure, so its in atm.

Ryan Agcaoili 2E

I find myself struggling to stay motivated as well due to the academic setbacks I experienced so far, especially in this class alone. To stay more motivated, I believe that taking breaks and surrounding yourself with a great support system will definitely boost your morale.

Ryan Agcaoili 2E

This quarter I feel that my study habits were decent because I went to UA sessions, but I feel that I could improve better by doing the textbook problems consistently everyday and reading more of the textbook.

Ryan Agcaoili 2E

My plans for the winter break are to catch up on sleep and to play more video games.

Ryan Agcaoili 2E

In order to manage my anxiety, I tend to exercise by taking a quick jog so that I can get my mind off academics.

Ryan Agcaoili 2E

I believe that grades would be out by Saturday according to Lavelle's email.

Ryan Agcaoili 2E

As of right now (6:44 p.m.), logging into CCLE has worked for me.

Ryan Agcaoili 2E

Watching youtube videos like O-chem tutor really helps and clarifies a lot of confusion. It also helps to memorize all the strong acids and bases so that you can immediately recognize them.

Ryan Agcaoili 2E

Aside from the tips listed above, one tip that has helped me when naming coordination compounds is to write out the different parts of the ligands and cations in different segments because it helps me stay organized and makes the work less chaotic to work with.
Hope this helps!

Ryan Agcaoili 2E

I feel like the questions that would have partial credit would be the calculation-based problems, or any problem that is related to the topics in the first midterm.

Ryan Agcaoili 2E

Not only practice exams will help, but doing and reviewing all the textbook problems would definitely help a lot!

Ryan Agcaoili 2E

Phosphorus is an exception to the octet rule because it is further down in the periodic table, allowing it to hold more than 8 electrons in octet,

Ryan Agcaoili 2E

In order to stay focused, I like to take things one step at a time so that I do not get overwhelmed with classes. It is also important to do your favorite hobbies so that you can destress.

Ryan Agcaoili 2E

There is no partial credit for the second midterm because the questions were more conceptual rather than calculation based.

Ryan Agcaoili 2E

I feel there are definitely many rooms for improvement in terms of how I study and prepare for the exams. I also feel very comfortable in this class because of the extensive resources available, especially the UA sessions.

Ryan Agcaoili 2E

Resonance is the only way in which delocalized pi bonds can occur because the different structures implies different electron placements.

Ryan Agcaoili 2E

How many questions would be on the final? Will it contain questions with or without partial credit, or both?

Ryan Agcaoili 2E

The lewis structure with the lowest amount if energy and the structure where the negative formal charge is on the most electronegative atom will always be preferred.

Ryan Agcaoili 2E

When dealing with the boiling point, the bigger the size of the molecule, the more electron distortion that it can experience, thus resulting in more dipole moments. It is important to note the difference between IMFs and covalent bonds.

Ryan Agcaoili 2E

After midterms, I feel that the best way to relax is to do your favorite hobbies because they help distract you from anything stressful in school. It is also important to remember to keep up with the lectures after the midterm because you do not want to fall behind.

Ryan Agcaoili 2E

In UA sessions, they review certain topics based on the week and give problems on them. They lightly review the topics, whereas in Step-Up sessions, they review the topics and problems with more emphasis on the steps and detail.

Ryan Agcaoili 2E

How can molecules with double polar bonds accept electrons? (Like SO2)

Ryan Agcaoili 2E

One way to identify a lewis base is by drawing the lewis structure of it. If the compound is electron deficient, then it is a lewis base because it needs to accept electrons. A lewis base usually is an anion or has extra electrons, which can be donated to lewis bases.

Ryan Agcaoili 2E

The central atom is the one that has the least electronegativity. Since the trend of electronegativity increases to the right and to the top (with fluorine having the most), you select the atom that is the farthest.

Ryan Agcaoili 2E

I am pretty sure we will not be tested on that, similar to how we encountered problems on oxidation number. Just in case, I would double check with someone else.

Ryan Agcaoili 2E

One thing to think about is that London dispersion forces are always present in all molecules. However, to find out whether its only London dispersion forces, I use the process of elimination. The first thing I check is to see if the molecule is an ion-dipole relationship. The next aspect is to chec...

Ryan Agcaoili 2E

In order to draw different resonance structures, I exchange the electron formation and bonds while keeping the number of overall valence electrons the same. It is also important to calculate the formal charge while doing this.

Ryan Agcaoili 2E

Personally for me, I study in an area that provides the least distractions. Staying in an environment that is less likely to influence you to distract yourself will actually help a lot. In addition, muting notifications on your phone or just putting in away from your presence will definitely keep yo...

Ryan Agcaoili 2E

From my TA and some other people, I heard that posts will only be counted at the end of the quarter. Just to be sure, I clarify with someone else as well.

Ryan Agcaoili 2E

Personally, I feel that the online format has pros and cons to learning. The biggest obstacle that I have faced is being distracted and trying to balance other classes along with my personal life. We all got this guys!

Ryan Agcaoili 2E

I believe that each atom should have its own formal charge because each atom on the compound can have different numbers of bonds and valence electrons.

Ryan Agcaoili 2E

I do not think it is required to memorize the specific values for electronegativity, but to memorize the trends of it on the periodic table and its relation to ionic/covalent character. I remember during the lecture he said that if we had to determine if a compound has ionic or covalent character, h...

Ryan Agcaoili 2E

In order to destress and relax, I usually go exercise or play video games because it distracts me.

Ryan Agcaoili 2E

We should have 20 posts by week 4 since it is 5 posts per week.

Ryan Agcaoili 2E

I believe that l=4 would be equivalent to higher orbitals, but in this class we are only dealing with 0,1,2,3.

Ryan Agcaoili 2E

The concept of electrons being excited to a higher level relates to electron configuration because an electron that is excited means that there are added electrons. In an electron configuration, this would be represented by the valence electron being in the next orbital.

Ryan Agcaoili 2E

The term "ground state" refers to the lowest energy state that an atom can have.

Ryan Agcaoili 2E

Did you hear that oxygen when on a date with potassium?

It went OK.

Ryan Agcaoili 2E

Personally, I study in short intervals of about an hour because taking breaks are important for retaining information. Everyday I review bits of my lecture notes so that the information stays in my head. In addition, I recommend attending every UA session even if think you are fine. Doing problems w...

Ryan Agcaoili 2E

Orbitals describe the location of where an electron can be found. As of right now, there are more orbitals after f, but we are not required to learn that.

Ryan Agcaoili 2E

For my discussion, I am just going to log into zoom on another device while the test is going on. Since I am taking the test on respondus on my computer, zoom will be closed, so you have to access zoom on an external device.

Ryan Agcaoili 2E

I don't think you can view solutions to even problems, only odd.

Ryan Agcaoili 2E

One of the methods that I am using for studying is to review all the lecture notes, doing all the textbook problems, and going to all the UA sessions and doing their worksheets. UA sessions help a lot because you are able to interact with other students and they can answer questions live.

Ryan Agcaoili 2E

Work is the amount of energy that it takes for an electron to be ejected. According to the photoelectric experiment, the energy of a photon must be greater or equal to the work function, which is also referred to as the energy needed to eject an electron. You will know when to apply the equation whe...

Ryan Agcaoili 2E

If you have Amazon prime, you can definitely get a webcam for a low price since there was "Amazon prime day."

Ryan Agcaoili 2E

Another way you can find the energy of the photon besides (E=hv) is through the photoelectric formula which is E(photon) - E(ejected electron) = Kinetic energy of electron. If you were given the wavelength of an ejected electron, you would have to use c=( λ )(ν) and move the variables around to ν=c/...

Ryan Agcaoili 2E

I do not think it is necessary to memorize historical figures, but I feel that we should memorize the important names that are tied to constants, equations, experiments, laws, etc. It would be beneficial to remember some so that it will help you remember concepts.

Ryan Agcaoili 2E

For one of my problems in discussion, we were tasked to find the molecular formula of caffeine, which included the elements CO2, H2O, and nitrogen. I know that nitrogen exists as a diatomic element, so it is written as N2. But when I am finding the moles of nitrogen, do I treat it as N2 or N? All re...

Ryan Agcaoili 2E

In quantum mechanics, a photon is a particle of light that harbors energy. Unlike classical mechanics, light is treated as a wave, but in this case, a photon is a particle.

Search found 106 matches