CHEMISTRY COMMUNITY

Isabelle Kludt 2B

When it comes to T, we can utilize Le Chatelier's principle to determine how the equilibrium constant, K (product/reactant), is affected For exothermic reactions: A + B <--> C + D + heat - increasing heat = "increase in products" = favor increase in reactant & decrease in product = K ...

Isabelle Kludt 2B

An intermediate will be produced and used up and therefore not in the final reaction products while the catalyst will be.

Isabelle Kludt 2B

The average rate is the change in concentration over a selected period of time. It depends on what time interval you decide on. The instantaneous rate is the rate at a particular time (an instant). They are not calculated the same, since the average rate is over a longer period of time. The instant...

Isabelle Kludt 2B

Yes that's correct!

Isabelle Kludt 2B

Hi! In the cell diagram, we put the solids on the outside because they typically represent the anode and the cathode electrodes that work to transfer the electrons. We therefore put the aqueous, usually charged, molecules on the inside closest to the salt bridge since they are the ones most easily ...

Isabelle Kludt 2B

The overall order will be the sum of all of the orders.

Isabelle Kludt 2B

You can use the aqueous and the gasses to solve.

Isabelle Kludt 2B

The catalyst lowers the activation energy of a reaction and increases the rate.

Isabelle Kludt 2B

Yes, if there is a pressure increase then the entropy will decrease.

Isabelle Kludt 2B

Thank you for sharing this!

Isabelle Kludt 2B

Its down for me too. That really sucks.

Isabelle Kludt 2B

Hannah Kim 3C wrote:Since this is the second order, you would use this equation: 1/[A]t=kt+1/[A]0.
[A]t = 0.200
[A]0 = 0.68
k = 0.360
Then you would just use algebra after this to find t.
Make sure your units all match.

Thank you for explaining this also helped me!

Isabelle Kludt 2B

It can be used to know how the equilibrium constant will be changed by different temperatures.

Isabelle Kludt 2B

The catalyst will decrease the activation energy of both the forward and reverse reaction and therefore increase the rate of both the forward and reverse. For me it makes sense because at equilibrium the forward and reverse reactions happen at the same rate so if the forward increases it makes sense...

Isabelle Kludt 2B

This helped me a lot thank you!

Isabelle Kludt 2B

I love pumpkin pie and pumpkin flavored things. I wish it wasn't considered a seasonal flavor because I always get sad when stores takeaway their pumpkin flavored stuff after fall.

Isabelle Kludt 2B

Organic chemistry tutor on YouTube is very helpful for me.

Isabelle Kludt 2B

The slope will be k!

Isabelle Kludt 2B

I think combustion is more of a reaction whereas ignition is a way to start a reaction or provide energy.

Isabelle Kludt 2B

Yes both can be considered strong acids.

Isabelle Kludt 2B

Yes it will stay the same!

Isabelle Kludt 2B

You have to be careful when comparing what the slopes signify when comparing the slopes of different order reactions. Remember that for a 0 order reaction, the axes are time and [Reactant] whereas the slopes of a 2nd order reaction graph are time and 1/[reactant]. Direct graphical comparisons are t...

Isabelle Kludt 2B

Caroline 2A wrote:Hi!

The answer in Achieve really helped me visualize why the answers are what they are. I will attach it below and I hope this helps :)

Thank you for sharing this it was helpful for me!

Isabelle Kludt 2B

This might sound kind of silly but I sometimes like to do power poses or superhero poses before tests, it makes me feel a lot more confident and energized it might be helpful to try.

Isabelle Kludt 2B

If you are talking about ICE then its whichever side is being used up in the reaction and the other side will be +x.

Isabelle Kludt 2B

Catalysts increase the rate of the forward and reverse reaction. At equilibrium both reactions happen at the same rate so when the forward reaction rate increases the reverse must increase too.

Isabelle Kludt 2B

It can be either!

Isabelle Kludt 2B

It can be either!

Isabelle Kludt 2B

Enzymes are a type of catalyst but catalysts aren't always enzymes.

Isabelle Kludt 2B

its because of the arrhenius equation, k=Ae^(-Ea/RT)

Isabelle Kludt 2B

Intermediates are consumed but catalysts don't get used up

Isabelle Kludt 2B

Yes that's correct!

Isabelle Kludt 2B

Yes, temperature and adding a catalyst will effect it/

Isabelle Kludt 2B

one way that I know for sure is just comparing different experimental results if they're given. If u remember from class to look at the data they give you and then look at what reactants stay constant and compare what happens to the rate as each reactant is changed individually. I found this vid to...

Isabelle Kludt 2B

at lower temperatures particles move slower and have less energy.

Isabelle Kludt 2B

It is dependent on temperature not volume.

Isabelle Kludt 2B

I think it would be given.

Isabelle Kludt 2B

I think it depends on the equation and k.

Isabelle Kludt 2B

Yes its cumulative!

Isabelle Kludt 2B

This is a great resource thank you!

Isabelle Kludt 2B

Hi! This question gives information about the activation energy, the temperature, and the rate constant. These are all concepts that are part of the Arrhenius equation ln( k2/k1 ) = (Ea / R )(1/T1 - 1/T2). Where R = 8.314 J/mol K and k2/k1 is the quantity by which the rate increases ( in the case o...

Isabelle Kludt 2B

Phoebe bridgers is really chill and for songs with no lyrics I like to listen to the mandolorian soundtrack its such great instrumental music.

Isabelle Kludt 2B

I like to study by kerckhoff there's a bunch of tables and you can also get food and coffee from the cafe nearby. Its also a great place to go between classes because its right by math and sciences.

Isabelle Kludt 2B

AAhs! is a really fun store. They have toys and all kinds of random things like party supplies, squishmallows, anime stuff, candy, and even costumes and wigs. the staff are cool and its mostly not too expensive.

Isabelle Kludt 2B

The final will be on everything from the quarter but I could see there being more on the stuff that we just learned and wasn't covered in the midterms but I don't know for sure.

Isabelle Kludt 2B

Yes the catalyzed reaction will have a higher rate.

Isabelle Kludt 2B

I think its more important to know the equations than the derivations. You should be able to get everything you need from the equation.

Isabelle Kludt 2B

I think because a reaction at equilibrium happens with both the forward and reverse reactions at the same rate so if the forward reaction is increased in rate then the reverse must also increase to match. The catalyst will lower the activation energy for both and they happen simultaneously.

Isabelle Kludt 2B

If you are doing change in temp as long as both your initial and final are in the same form ie celsius and celsius or kelvin and kelvin, then either works.

Isabelle Kludt 2B

all of the bonds will have one sigma bond and then double bonds will have one pi bond and triple will have 2 pi bonds.

Isabelle Kludt 2B

I think looking at the chart helps but it really helps me to think about it visually and in a 3D way like why it would make those shapes so you don't have to worry about memorizing if it makes sense looking at it.

Isabelle Kludt 2B

When you turn in achieve late it doesn't dock any points but it might be up to the TAs.

Isabelle Kludt 2B

It was the only one that seemed like it could be correct.

Isabelle Kludt 2B

This was very helpful thank you!

Isabelle Kludt 2B

Based on what Dr. Lavelle has said it seems like we will just be jumping right in where we left off in the last lecture I guess.

Isabelle Kludt 2B

F has 7 valence already so it only needs one to complete the shell.

Isabelle Kludt 2B

Not an answer but thinking about liquid/melted glass every time I see it I think it looks delicious. Like it looks so smooth and chewy lol.

Isabelle Kludt 2B

I thought this question was interesting but didn't know how to answer it myself, so I found out from the Department of Physics at the University of Illinois that glass isn't technically a solid. Most glass substances mostly consist of silicon dioxide, SiO2, which is the main component in sand. When...

Isabelle Kludt 2B

Ah this is so interesting. I just bleached my hair for the first time a few weeks ago its crazy to think its completely chemically altered now.

Isabelle Kludt 2B

All of these tips are helpful and its really comforting to see so many people posting about this stuff.

Isabelle Kludt 2B

All of these tips are helpful and its really comforting to see so many people posting about this stuff.

Isabelle Kludt 2B

I was dying when he put up the one that said "My wife treats me like a [censored]. She ignores my existence and only talks to me when she needs something."
The whole class cheered when he revealed the first part then he put up the second part and everyone lost it.

Isabelle Kludt 2B

Im hoping ill finally be able to relax after finals knowing I've finished everything and I can go home and chill.

Isabelle Kludt 2B

This is amazing thank you for sharing!!

Isabelle Kludt 2B

Im excited to go to Seattle and see my dogs and family. I can't believe how much I miss my dogs its probably the worst thing about college so far lol.

Isabelle Kludt 2B

Post final I'm feeling less stressed now that its done but I'm not feeling great about how I did.

Isabelle Kludt 2B

Hannibal is one of my favorites and Love Death and Robots its so good and its on Netflix.

Isabelle Kludt 2B

noahbehrendt2L wrote:My all time favorite shows are South Park and What We Do in The Shadows. Highly recommend both if you are looking for a good laugh.

Yessss What we do in the shadows is great its so under rated!

Isabelle Kludt 2B

When I'm feeling anxious or down walking or working out really helps. I never really feel like working out and it always sounds like too much work but every time I do it it helps so much. It gets the nervous energy out and helps me think clearly. A lot of these other answers were also helpful thanks...

Isabelle Kludt 2B

Ionic bonds are usually stronger but in water covalent can be stronger as ionic dissociate. this is why that's often the case in biology because these bonds are taking place in biological systems where there is water.

Isabelle Kludt 2B

Bronsted acid is a proton donor and Lewis acid is an electron acceptor. They are both acids and very similar but different ways to define them.

Isabelle Kludt 2B

Thank you for all the effort you put into teaching and giving us resources!

Isabelle Kludt 2B

This thread has been very helpful!

Isabelle Kludt 2B

Thank you this was helpful!

Isabelle Kludt 2B

So cool to see the update. Thanks for sharing again!

Isabelle Kludt 2B

Thank you! I hope everyone did well!

Isabelle Kludt 2B

This thread is so interesting thanks for sharing!

Isabelle Kludt 2B

You determine magnetic quantum number by taking l, l-1, and -1 for whatever l is. If l = 1, then you have 3 possible values of m. But if l = 2, you have 5 possible values of m. For the final electron in Cl, the quantum numbers would be: n = 3, l = 1, m = +1, and ms = +1/2 This explanation was helpf...

Isabelle Kludt 2B

It is not being used in the reaction to make products so its not included in the reaction but like physically its still there like you said.

Isabelle Kludt 2B

13 sigma and 3 pi

Isabelle Kludt 2B

pi bonds can't rotate they will break.

Isabelle Kludt 2B

pKa is the negative log of pK so they are related and the way the -logs work makes it so larger Ka will make smaller pKa

Isabelle Kludt 2B

pOH + pH = 14 so you can find either if you are given one of them.

Isabelle Kludt 2B

Yes that's right if the bonds and connections aren't really changing it stays the same.

Isabelle Kludt 2B

Yes it decreases diagonally from the top left to the bottom right.

Isabelle Kludt 2B

Thank you this was very helpful.

Isabelle Kludt 2B

Theres a lot of useful stuff on YouTube. Organic chemistry tutor is very helpful.

Isabelle Kludt 2B

This is great to know thank you!

Isabelle Kludt 2B

this has to do with atomic trends, as you go more right the elements have more protons and electron affinity.

Isabelle Kludt 2B

I can see how it is overwhelming, don't worry I don't think reading the whole thing is necessary. I would just use it to focus on topics you don't understand as well or are struggling with.

Isabelle Kludt 2B

when more O is added so is more negative charge so in order to be neutral and cancel those charges the atom must have more positive oxidation number.

Isabelle Kludt 2B

molar mas is g/mol so you can convert by multiplying or dividing just set up ratios and make sure units cancel out when in doubt.

Isabelle Kludt 2B

its non polar because it is symetrical and the dipoles go equally each direction so they cancel out. one side does not have a charge because they are all the same.

Isabelle Kludt 2B

[H+] = 10^-pH

Isabelle Kludt 2B

all molecules have it, its just another name for the dipole-dipole stuff we have talked about.

Isabelle Kludt 2B

Yep so for double there's one sigma and one pi and for triple bond there's one sigma and two pi.

Isabelle Kludt 2B

I think its the same format as midterms, its multiple choice but its 90 minutes long. Its a lot longer so it will probably be like 20-30 questions instead of 15.

Isabelle Kludt 2B

I would go over the materials like the others said and make sure to keep checking in with yourself to see if you are understanding things. When doing practice problems its good to make sure you know why you are doing what you are doing so you can do it correct for other problems don't just copy or m...

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