CHEMISTRY COMMUNITY

Francesca_Borchardt_2D

I am pretty sure it is just 14B !

Francesca_Borchardt_2D

I just think about how soon it will be over and try to not think about it too much. Remember how many times you have had a test and you have always been ok after

Francesca_Borchardt_2D

In week 9&10's sapling #7, the reactions is 2A(g)+2B(g)+C(g)⟶3G(g)+4F(g) For this reaction, the initial conc. of C is different in all the experiments and the order of reactant C is zero. If a reactant's initial concentration is different in all the experiments, can I automatically assume that ...

Francesca_Borchardt_2D

Hi! You are going to need to use the Arrhenius equation ( k = A e^{\frac{-E_{a}}{RT}} ) to determine k for the original pathway, then for the catalyzed pathway. k will be exponentially higher for the catalyzed pathway due to the change in activation energy, so expect a large ratio as you will be fi...

Francesca_Borchardt_2D

Hello,

I am really confused about how to do this problem. Could someone help me with this?

Thank you!

Francesca_Borchardt_2D

Hello, I am having trouble with the textbook problem 7B.13. "The half-life of A in a second-order reaction is 50.5 s when [A]0=0.84 mol/L. Calculate the time needed for the concentration of A to decrease to (a) one-sixteenth; (b) one-fourth; (c) onefifth of its original value." I understan...

Francesca_Borchardt_2D

I would say to still know how to use it because it says on the outline you should be able to. Although you can solve in a number of different ways, it is still very important you understand the Van Hoff equation and know how to use it. There might be some questions on the final relating to it. Hope ...

Francesca_Borchardt_2D

I completely forgot about daylight savings. Thank you for this helpful reminder!

Francesca_Borchardt_2D

In thermodynamics, Gibbs Free Energy is a way to determine the amount of work at constant pressure and constant temperature. It combines a lot of topics learned in thermodynamics such as enthalpy and entropy and is super helpful in determining if a reaction is spontaneous. Hope this helps!

Francesca_Borchardt_2D

I have been going through this and it has been difficult to stay motivated. However, I am starting to feel more motivated because I took a day break from school and I made a study plan in my planner which has really been helping! Hope this helps

Francesca_Borchardt_2D

I used to handwrite my notes on paper in Chem 14A, however for Chem14B, I got an iPad and have been doing notes on Notability. I can say that I retain a lot more information when taking notes on my iPad. What also helps me is to write the notes in my own words because it helps me conceptualize topic...

Francesca_Borchardt_2D

I think its going to be dependent on what we spent time on. Each outline for sure will be in the final, however because we spent a lot on Thermodynamics there might be more questions on that. It is cumulative so I would make sure you know everything we have learned. Hope this helps!!

Francesca_Borchardt_2D

To find this, look at the charges on each side of the equation. Say if one side has a neutral charge of zero, and the others charge is 4+, you would add 4 electrons to the zero side to balance the equation and make it 4+. Hope this helps!

Francesca_Borchardt_2D

I would not use them interchangeably. They each give you different answers

Francesca_Borchardt_2D

Usually mine prompts me when I need to update it.

Francesca_Borchardt_2D

I do a lot of practice problems and go over each outline to make sure I understand everything and I am comfortable. On the day of the final, I try not to overthink and stress out, I relax until I have to take the final. I go to the final a little early to make sure everything is set up.

Francesca_Borchardt_2D

Good Evening,

I am having a lot of trouble on Sapling Week 7/8 specifically question 5. I am confused on how to balance the equation as well as finding the oxidation and reduction agents. Could someone help me with this?

Thank you!

Francesca_Borchardt_2D

I LOVE sushi!!

Francesca_Borchardt_2D

I am pretty sure you can make posts in Chem 14A too. I am pretty sure the purpose for this is to help each other learn, so I don't think there is any harm posting in that category, overall just make sure you are not asking Chem 14B questions there

Francesca_Borchardt_2D

Yes!! It feels so relieving and I feel pretty confident about Midterm 2 so that's great!

Francesca_Borchardt_2D

I have a part-time job right now and I am struggling as well. What works for me is to plan my days in my planner and make the most of my time. Weekends are when I catch up a lot on schoolwork.

Francesca_Borchardt_2D

I was not able to get into Chem 14 BL and Chem 14 C because they filled up sooo quick. I am going to be taking LS7B, LS40, and Engcomp 3D.

Francesca_Borchardt_2D

Hello, I sometimes struggle with the math parts as well. What helps me is looking at the examples in the textbook and do all of the textbook problems and using the examples to do them. I make sure I understand how to do each step. Also, what helps is watching YouTube videos on the topics and usually...

Francesca_Borchardt_2D

I plan on taking Chem 14 BL, Chem 14 C, Engcomp 3D, and LS7B. Hopefully I get them all

Francesca_Borchardt_2D

I have been binge-watching Gossip Girl for the second time and it is pretty good

Francesca_Borchardt_2D

I am struggling a lot too and I do the same thing. The thing that I am doing more now is conceptualizing the concepts more and doing the practice problems over and over until I feel confident and understand how to exactly solve it without looking at my notes.

Francesca_Borchardt_2D

Thanks for this! Happy Valentine's Day!!

Francesca_Borchardt_2D

Hello, To calculate the molar enthalpy of vaporization, ΔHvap, the equation q=nC is used. In the equation q is equal to the amount of absorbed heat, n is the amount of moles vaporized, and C is the enthalpy of vaporization. For the q value, we can find this because the problem states that the heater...

Francesca_Borchardt_2D

Same thing happened to me. I studied and thought I knew the material really well, however I did really bad on the midterm. I have felt really bad but I am going to study differently now and hopefully do better on the next midterm. You got this!!

Francesca_Borchardt_2D

I do not watch football, but I was rooting for the Chiefs.

Francesca_Borchardt_2D

So essentially you need first find the amount of energy is consumed by the phase change of the ice cube, which can be found by converting the mass of the ice cube to moles and then multiplying this value by the heat of fusion of water. (53.8 g / 18 g.mol-1) x (6.01×10^3 J/mol) This value can be use...

Francesca_Borchardt_2D

You have to account for phase changes. Just because it is forming compounds, does not automatically mean it is releasing energy. Hope this helps!

Francesca_Borchardt_2D

You can use both and should get the same answer

Francesca_Borchardt_2D

Thank you for saying this. I prepared and studied a lot, however, I do not think I did well. This was very reassuring and made me feel better!

Francesca_Borchardt_2D

I do not think I did well, and it made me pretty stressed out. Thank you for posting this, it made me feel that I am not alone. After the midterm, I watched some Hulu and relaxed.
I plan on studying differently for the next midterm and working harder so I do not have such a difficult time.

Francesca_Borchardt_2D

I am going to be taking Chem BL with Chem C in Fall 2021 quarter!

Francesca_Borchardt_2D

I have been having trouble with effective studying techniques. These seem super helpful and I am going to try these!
Thank you!!!

Francesca_Borchardt_2D

I had very similiar struggles. I do not think I did well although I prepared very well. I felt like I was running out of time and had to guess on some questions. I did the ones I was more familiar with first, then the ones that were harder after. I do not know how to manage my test time better. But ...

Francesca_Borchardt_2D

Kc is just more specific I believe. K is just used more interchangeably.

Francesca_Borchardt_2D

I am usually a little slower completing problems, and for me, there was plenty of time to complete each problem. I even had time to check my answers. I wouldn't stress, hope this helps!

Francesca_Borchardt_2D

If a salt has a strong base and a strong acid, it is neutral. If it has a strong base and a weak acid, it is basic. If it has a weak base and a strong acid, it is acidic.
Hope this helps!

Francesca_Borchardt_2D

Rylee Mangan 1K wrote:He just emailed us! "Midterm 1 covers Chemical Equilibria, Acid and Base Equilibria, and only these Week 3 topics (4D.3; 4D.4; 4D.5; 4E.3)"

Yes! I just saw. Thank you!!

Francesca_Borchardt_2D

Hello,
Does anyone have any study tips on studying for the midterm? I have a little trouble figuring out the most efficient way to study for this class.
Thank you!

Francesca_Borchardt_2D

Hello,

Does anyone know what topics will be covered on the midterm? I believe it is everything from the first three outlines, but I am not completely sure. Also, does anyone know if it will all be covered equally?

Thank you!

Francesca_Borchardt_2D

Once I take notes and understand an idea, I will do practice problems from the textbook. Also, I watch Youtube videos which help to reinforce my knowledge. Hope this helps!

Francesca_Borchardt_2D

It seems that Lavelle changed it up a bit since Chem 14A. There are some weeks when its due and some where its not. On Sapling, it will tell you when each assignment is due

Francesca_Borchardt_2D

I believe they are formatted similiar to Chem 14A, however, they will take place during lecture vs discussion.

Francesca_Borchardt_2D

I think this is a great idea and I would love to join!!

Francesca_Borchardt_2D

Thank you guys!! All of your explanations really helped me

Francesca_Borchardt_2D

Hello,

I am having a lot of difficulty solving question 6 on Sapling. Can someone explain to me step by step on how to solve this problem?

Thank you very much!

Francesca_Borchardt_2D

I would recommend doing the textbook problems because they are very good practice, however, they are not mandatory. That assignment is referring to Sapling which is mandatory!

Francesca_Borchardt_2D

Yes you will, from my understanding, you just have to post 5 times a week! Hope this helps!

Francesca_Borchardt_2D

I was confused on this as well, all the above replies really helped me.. Thank you everyone :)!

Francesca_Borchardt_2D

Hi everyone,
I was wondering if anyone has useful study tips that have helped them excel in chemistry and truly retain and conceptualize the information. I have difficulty studying chemistry and retaining the information effectively.
Thank you,
Francesca

Francesca_Borchardt_2D

Hello,
I am a bit confused about the textbook problem 5G.11. Could someone explain how to solve this problem please?

Thank you!!

Francesca_Borchardt_2D

Thank you for your encouragement!!! I have had discouraging thoughts recently but this helped me bring some perspective. Thank you and good luck, everyone!!!

Francesca_Borchardt_2D

If you have respondus installed on it, I am pretty sure you can.

Francesca_Borchardt_2D

I am not sure about this either. I would like to know too

Francesca_Borchardt_2D

I am going to review my notes often over break just to make sure I remember the information because I have trouble remembering information over time as well. I will also maybe do some practice problems from the textbook to reinforce my knowledge.

Francesca_Borchardt_2D

I agree. I watch his videos a lot especially when I need some clarification on specific topics!!

Francesca_Borchardt_2D

I do not think there will be a study guide on the final. It covers all the material we learned so far. I have heard that it is going to be on topics we discussed more.

Hope this helps!

Francesca_Borchardt_2D

My TA did not say anything regarding this, however I have heard exactly what the above comments said! I would recommend using flash cards to help memorize!

Francesca_Borchardt_2D

I have trouble with this as well. All of the tips really helped. Thank you guys!

Francesca_Borchardt_2D

I just look it up on google and plenty of useful images come up!

Francesca_Borchardt_2D

All resonance structures are not equal because the lowest energy is the one that is always favored.

Hope this helps!

Francesca_Borchardt_2D

What helps me, is going over all of the material multiple times and marking topics/ concepts I have trouble with. Then, really focus in on those topics through my notes, lectures, Youtube videos, and textbook problems.

Francesca_Borchardt_2D

I have trouble with this a lot. I think we just have to memorize the ligands and the chart!

Francesca_Borchardt_2D

All of these tips were helpful.. For me, I am going to go every all of my notes and topics and general to make sure I understand everything first. I am also going to mark sections that need review and that I may be struggling on. Then, I am going to do practice problems again in the textbook and mar...

Francesca_Borchardt_2D

I am doing overall pretty well. I am definitely stressed out for finals and trying to make sure I am staying on top of everything. I also am feeling a bit anxious about grades..

Francesca_Borchardt_2D

I have been having trouble naming the coordination compounds. Does anyone have any tips? Hi! I would just recommend doing a lot of practice problems in order to get used to the different prefixes, suffixes, and ligand names, but I generally just remember to (1) list ligands in alphabetical order, n...

Francesca_Borchardt_2D

I know on the midterm, I got partial credit on one question so I am pretty sure!

Francesca_Borchardt_2D

All of the above tips were super helpful.

For me, I am going to review my notes and do textbook problems I have had trouble with. Also, I am going to rewatch some lectures including topics I am unsure of.

Francesca_Borchardt_2D

I have been having trouble naming the coordination compounds. Does anyone have any tips?

Francesca_Borchardt_2D

I do not think we have to know this. However, my TA did say anything we have learned could be on the final.

Francesca_Borchardt_2D

I am assuming since it is the final, it is going to be reviewing everything. Not sure though since it has not been announced.

Francesca_Borchardt_2D

I know for midterm 1, my TA had us set up appointments to go over the midterm with him. I am assuming the same is going to happen for Midterm 2 too.

Francesca_Borchardt_2D

They usually are released a week after once everyone has taken the midterm.

Francesca_Borchardt_2D

I am pretty stressed about my grade as well. I did not do as well on the past midterm then I would have liked. However, I have definitely prepared a lot better for this one and feel confident about it.

Francesca_Borchardt_2D

I am a little nervous for the midterm. However, I have studied a lot and understand everything so I feel prepared and I hope I do well.

Francesca_Borchardt_2D

I was having trouble understanding this as well. Thank you all for explaining it so well, it really helped.

Francesca_Borchardt_2D

I did a similiar thing as the others. I thought of which bond was closest to the character of the typical bond and logically chose the closest one.

Francesca_Borchardt_2D

I was wondering the same thing. I believe it's the same amount of time since the questions are shorter but I may be wrong.

Francesca_Borchardt_2D

Hi! I can definitely explain. So quantum numbers have some basic rules you have to know. The oxidation numbers in a neutral compound should add up to zero. For the example where there is a -1 charge, it should add up to that number. Oxygen normally has a O# of -2 (thats just a rule). Then you multi...

Francesca_Borchardt_2D

There is a part to this question where it asks us to find the oxidation number. Can someone explain exactly how to find this??

Francesca_Borchardt_2D

I was having trouble with this as well. All of the responses really helped. Thank you all!!

Francesca_Borchardt_2D

You would figure the second question out by asking yourself which of the three Lewis Structures of the carbamate ion is the least stable. To do this, you would look at the formal charges of the three structures and whichever one is more charged (as in it has more atoms with negative/positive formal...

Francesca_Borchardt_2D

I am confused on the second part to the question..
"Which of the Lewis structures would be expected to contribute the least to the overall structure of the carbamate ion?"
How would you figure out this question?

Thank you!!

Francesca_Borchardt_2D

I am not good at this too. I do not believe we need to know since we have not really gone over nomenclature

Francesca_Borchardt_2D

Yes, I have not received my score yet. I was wondering the same. Probably when everybody took the test.

Francesca_Borchardt_2D

I'm not sure but I thought that n1 refers to the final level that the electron returns to, while n2 is the initial level. I don't necessarily think that you would always subtract the higher level from the lower one; if the electron absorbs energy and is excited to a higher level, n1 would be higher...

Francesca_Borchardt_2D

I am confused on the ionic radius as well. The replies to this comment helped me understand it a bit better!

Francesca_Borchardt_2D

When I am really stressed out and I need to relax, I go on a run. I love running and it really helps to clear my mind and calm my nerves.

Francesca_Borchardt_2D

In addition to what everyone else said, make sure that you convert your wavelength from m to angstroms. (1 angstrom=10^-10m). To do this, you take your wavelength in meters / conversion factor (10^-10).

Hope this helps!

Francesca_Borchardt_2D

I had difficulty understanding the purpose of the DeBroglie Equation and all of these responses helped me. Thank you all!

Francesca_Borchardt_2D

I have wondered this as well. Many people have said you do not need to know. However, it is a good idea to memorize the basic ones.

Hope this helps!

Francesca_Borchardt_2D

Like the previous reply, it would be safest to memorize the basic units. I use the mnemonic King Henry Died By Drinking Chocolate Milk (kilo, hecto, deca, base (meters/grams/liters), deci, centi, milli) to help memorize the conversions! I have having difficulty memorizing this basic units. Thank yo...

Francesca_Borchardt_2D

Has Dr. Lavelle said whether we will be able to write on these printouts once the exam begins? Or should we have separate papers for scratch work? Additionally, do we know if these will be the same printouts for our second midterm and final? My TA said that we should not write anything on these pri...

Francesca_Borchardt_2D

Hello,

They are located towards the end of the textbook. The odd exercises answers are there. Page C12 is where the answers are.

Hope this helps!

Francesca_Borchardt_2D

Sapling homework is not due till Week 4!

Francesca_Borchardt_2D

I am interested about this too!

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