Search found 99 matches

by Jalaia Jackson 2G
Sat Feb 27, 2021 7:37 pm
Forum: Balancing Redox Reactions
Topic: Oxidation Numbers
Replies: 30
Views: 78

Re: Oxidation Numbers

I agree with the other comments, just practice remembering the common elements and you should be fine. Here's a link to a good review and practice. Hope this helps: https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Supplemental_Modules_(Analytical_Chemistry)/Electrochemistry/Redox_Chemist...
by Jalaia Jackson 2G
Sat Feb 27, 2021 7:28 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Cathodes and Anodes
Replies: 4
Views: 18

Re: Cathodes and Anodes

Agreeing, with the above comments they will show you in the diagram, but just remember that the anode is usually on the left and the cathode is on the right, with the anode going through oxidation and the cathode reduction.
by Jalaia Jackson 2G
Sat Feb 27, 2021 7:22 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Diamond vs. Graphite
Replies: 21
Views: 65

Re: Diamond vs. Graphite

I agree with the other comments, since the conversion is spontaneous it could happen at room temperature and 1 atm, but it would be a much slower process since the energy being absorbed is low.
by Jalaia Jackson 2G
Sat Feb 27, 2021 7:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community Points
Replies: 24
Views: 61

Re: Chemistry Community Points

Yeah, if you have received 50 points you can still post, you just don't get any extra points since that category is capped at 50.
by Jalaia Jackson 2G
Sat Feb 27, 2021 6:54 pm
Forum: Student Social/Study Group
Topic: Chem Community Points
Replies: 25
Views: 81

Re: Chem Community Points

The max is 50 points, but you are expected to post at least 5 times a week since there are 5 points per week multiplied by the 10 weeks, hence the total of 50 points.
by Jalaia Jackson 2G
Sun Feb 21, 2021 7:21 pm
Forum: Balancing Redox Reactions
Topic: Cell/battery
Replies: 26
Views: 76

Re: Cell/battery

Yes, I believe we can use them interchangeably. In Friday's lecture when writing the equation Lavelle used redox, cell, and battery in the E (__potenial), so I'm assuming they represent the same idea.
by Jalaia Jackson 2G
Sun Feb 21, 2021 7:17 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Salt Bridge Purpose
Replies: 8
Views: 26

Re: Salt Bridge Purpose

I think the purpose of the salt bridge is that it helps to maintain neutrality between the two sides of the circuit. It's to maintain a charge balance since the electrons are moving from one-half cell to the other. Without it, the ions can't flow between the cathode and anode freely.
by Jalaia Jackson 2G
Sun Feb 21, 2021 7:14 pm
Forum: Student Social/Study Group
Topic: Fave food
Replies: 138
Views: 306

Re: Fave food

My favorite food is any kind of pasta or sandwich. I've really been into shrimp scampi lately, and also craving mint chocolate chip ice cream.
by Jalaia Jackson 2G
Sun Feb 21, 2021 7:08 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Sapling #6
Replies: 5
Views: 15

Re: Sapling #6

Agreeing with the others, I think the battery is set up like this. When Prof. Lavelle told us about E cell= E (Right: cathode) - E (Left: Anode) in Friday's lecture. I think it will always be represented like this.
by Jalaia Jackson 2G
Sun Feb 21, 2021 7:04 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: State function?
Replies: 36
Views: 112

Re: State function?

Agreeing with the previous comments, E (cell potential) is not a state function because it is dependent on the path it takes, so it ends up being a path function.
by Jalaia Jackson 2G
Sun Feb 14, 2021 6:59 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy vs Entropy
Replies: 14
Views: 54

Re: Enthalpy vs Entropy

This isn't a dumb question at all. Enthalpy has to deal with heat, while entropy has to do with the state of a system. In more depth, enthalpy is the heat content of a system, and enthalpy changes when energy is either lost or gained. Entropy refers to the level of disorder of a system depending on ...
by Jalaia Jackson 2G
Sun Feb 14, 2021 6:52 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: temperature
Replies: 32
Views: 98

Re: temperature

Agreeing with most comments, I think the context of the question matters. If the question mentions Kelvins then you should convert like when dealing with entropy. I think it is a good habit to just convert to Kelvin, even if it is not specifically stated because most questions seemed to be formatted...
by Jalaia Jackson 2G
Sun Feb 14, 2021 6:44 pm
Forum: Student Social/Study Group
Topic: Valentine's Day Long Weekend!
Replies: 30
Views: 103

Re: Valentine's Day Long Weekend!

This is very kind. I hope everyone that reads this post is also able to enjoy their weekend and have a happy Valentine's Day.
by Jalaia Jackson 2G
Sun Feb 14, 2021 6:42 pm
Forum: Calculating Work of Expansion
Topic: irreversible vs reversible
Replies: 14
Views: 74

Re: irreversible vs reversible

If the problem does not directly state it, it might hint by writing "slow" or "quick" expansion or by talking about the type of pressure exerted on the system.
by Jalaia Jackson 2G
Sun Feb 14, 2021 6:36 pm
Forum: Student Social/Study Group
Topic: Fav Shows of the Moment
Replies: 104
Views: 254

Re: Fav Shows of the Moment

Currently, I've rewatched Game of Thrones, but I have also been watching Queen's Gambit and Scandal. All three shows are fantastic.
by Jalaia Jackson 2G
Sun Feb 07, 2021 12:48 am
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 189
Views: 1226

Re: Favorite TV shows

Just wanted to update:
I've been watching Vampire Diaries, The Walking Dead, Naruto, and Game of Thrones. I've been having a lot of fun watching them.
by Jalaia Jackson 2G
Sun Feb 07, 2021 12:38 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Standard Entropy
Replies: 2
Views: 15

Re: Standard Entropy

Agreeing with Karl, Prof. Lavelle mentioned this in Lecture # 12. The standard enthalpy of vaporization is linked to N or the # number of particles. When a system moves from liquid to gas, the molecules in the gaseous phase occupy more states compared to liquids or solids. This allows more possibili...
by Jalaia Jackson 2G
Sun Feb 07, 2021 12:32 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Heat vs Thermal Energy
Replies: 7
Views: 21

Re: Heat vs Thermal Energy

I think the main difference is that thermal energy doesn't move and stays inside the system versus heat, which is the energy that can be transferred in and out of a system like with endothermic and exothermic processes.
by Jalaia Jackson 2G
Sun Feb 07, 2021 12:24 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Difference in volume and temperature
Replies: 6
Views: 197

Re: Difference in volume and temperature

I agree with Andrew and Vince, I think it mainly depends on what is constant when looking at your system. You can also result in the same value too.
by Jalaia Jackson 2G
Sun Feb 07, 2021 12:21 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Work on a system
Replies: 27
Views: 84

Re: Work on a system

Just like others have mentioned, the simplest example is the tire pressure example that Prof. Lavelle brought up. Adding air into the tire increases the compression within the tire, which puts work into the system allowing for a positive value for work. Sapling also mentions this on one of their que...
by Jalaia Jackson 2G
Sun Jan 31, 2021 8:36 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Temperature Change
Replies: 13
Views: 70

Re: Temperature Change

Since the reaction is endothermic that means the system will take in heat. This will cause the reaction to shift right towards the products. Since the system is requiring more heat this will cause K to increase since the numerator will increase.
by Jalaia Jackson 2G
Sun Jan 31, 2021 8:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 1
Replies: 9
Views: 57

Re: Midterm 1

It usually takes around a week, he also emails us to update how grading is going.
by Jalaia Jackson 2G
Sun Jan 31, 2021 8:08 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8812
Views: 1496170

Re: Post All Chemistry Jokes Here

If H2O is water and H2O2 is hydrogen peroxide, what is H2O4?

Drinking, bathing, and lots of other activities.
by Jalaia Jackson 2G
Sun Jan 31, 2021 8:06 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Enthalpies of Formation using Hess's Law
Replies: 18
Views: 82

Re: Standard Enthalpies of Formation using Hess's Law

Yes, you're correct. You can rearrange the equation, but like the other comments mentioned keep track of the sign changes of the enthalpy.
by Jalaia Jackson 2G
Sun Jan 31, 2021 7:55 pm
Forum: Student Social/Study Group
Topic: Midterm Scores
Replies: 25
Views: 138

Re: Midterm Scores

The professor will send out an email when the grading is close to being finished. So, between a week or two, the grading should be inputted.
by Jalaia Jackson 2G
Sun Jan 31, 2021 7:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Reset?
Replies: 17
Views: 103

Re: Sapling Reset?

Just as everyone else has mentioned, I don't believe there is a reset button. However, you could copy the question and reanswer them separately, and then check the answer using Sapling. That could be a good method.
by Jalaia Jackson 2G
Sat Jan 23, 2021 10:30 pm
Forum: Phase Changes & Related Calculations
Topic: bonds and energy
Replies: 13
Views: 86

Re: bonds and energy

I believe it has to do with potential energy. Forming bonds releases energy because once they are formed the energy is no longer needed. It gets released which is why it is exothermic, compared to breaking bonds which requires energy.
by Jalaia Jackson 2G
Sat Jan 23, 2021 10:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Outline 3 Problems
Replies: 2
Views: 30

Re: Outline 3 Problems

Agreeing with the post above, he sent out an email listing the specifics of what we should do. It should outline what you should be looking at.
by Jalaia Jackson 2G
Sat Jan 23, 2021 10:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling vs. Textbook Problems
Replies: 8
Views: 44

Re: Sapling vs. Textbook Problems

Speaking from experience, the midterm is much more like the textbook problems. However, Sapling is good at breaking down the solutions step-by-step. Hope this helps.
by Jalaia Jackson 2G
Sat Jan 23, 2021 10:07 pm
Forum: Phase Changes & Related Calculations
Topic: Vapor vs gas
Replies: 96
Views: 261

Re: Vapor vs gas

Agreeing with everyone else, yes they refer to the same thing. Good question.
by Jalaia Jackson 2G
Sat Jan 23, 2021 10:05 pm
Forum: Phase Changes & Related Calculations
Topic: Leidenfrost Effect
Replies: 3
Views: 32

Leidenfrost Effect

I watched a video of a man touching lava, but very quickly, and yet he doesn't get burned. I looked it up and found out it is related to the Leidenfrost effect. Looking at the heating curve for water, how could we explain this effect?
by Jalaia Jackson 2G
Sun Jan 17, 2021 5:48 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Pressure Increase
Replies: 7
Views: 19

Pressure Increase

I remember on the post-assessment for module 4, one of the questions mentioned: "State whether the equilibrium will shift toward the products, reactants, or neither." ii. The pressure on the system is increased. The answer was neither. Why is that? I know a change in pressure doesn't chang...
by Jalaia Jackson 2G
Sun Jan 17, 2021 5:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ice Box Method
Replies: 14
Views: 95

Re: Ice Box Method

Thanks for asking this I had the same question. But, as everyone has mentioned it depends on what the question is asking for and which side the reaction will shift to. The question might say something like "1.50 mol PCl5 is placed..." and you have to look at the equation to see if it is th...
by Jalaia Jackson 2G
Sun Jan 17, 2021 5:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Chemistry Community
Replies: 4
Views: 26

Re: Chemistry Community

I think looking at the topic title when clicking on someone's post or if you post might help you differentiate if it is 14A or 14B material. Also, the other post might be right, some people probably just posted in the wrong place. This has never happened to me so I don't have much knowledge of this ...
by Jalaia Jackson 2G
Sun Jan 17, 2021 5:14 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: X less than 5 percent
Replies: 11
Views: 88

Re: X less than 5 percent

The 5% rule is probably just a guideline. If it is less than 5% you can approximate, but if it is more that is when the quadratic equation comes in. We probably use this rule because anything under 5% is very small, so it doesn't make that much of a difference to the overall composition. For example...
by Jalaia Jackson 2G
Sun Jan 17, 2021 5:08 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chatelier's Principle and Pressure
Replies: 6
Views: 40

Re: Le Chatelier's Principle and Pressure

Just as everyone has mentioned, when there's an increase in pressure, the volume will decrease. When the volume decrease to tell if the reaction will shift either left or right, you have to look at the moles of gas on each side of the equation. If there are more moles on the left then the reaction f...
by Jalaia Jackson 2G
Sun Jan 10, 2021 6:38 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Stable Reactants and Products
Replies: 7
Views: 42

Re: Stable Reactants and Products

I think stability implies that either the products or reactants are favored. The ratio of P/R is related to the energy difference of R and P. So, with stability depending on K it can tell you whether R or P is favored and the energy difference.
by Jalaia Jackson 2G
Sun Jan 10, 2021 6:32 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Equilibrium Adjustments
Replies: 10
Views: 67

Equilibrium Adjustments

I remember it was mentioned in lecture that chemical reactions adjust so as to minimize the effect of changes. What exactly does this mean, how do the reactions adjust themselves?
by Jalaia Jackson 2G
Sun Jan 10, 2021 6:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Homogeneous and Heterogeneous Equilibrium
Replies: 13
Views: 122

Re: Homogeneous and Heterogeneous Equilibrium

Agreeing with others, I believe you look at the overall reaction even if you are only calculating Kc or Kp. So, you look at each phase in the entire reaction and that’s what determines if the equilibrium is homogeneous or heterogeneous.
by Jalaia Jackson 2G
Sun Jan 10, 2021 6:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium Dynamic
Replies: 4
Views: 40

Equilibrium Dynamic

Is there anything else besides temperature that can make an equilibrium dynamic?
by Jalaia Jackson 2G
Sun Jan 10, 2021 6:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K=1
Replies: 8
Views: 74

Re: K=1

Agreeing with what everyone else said, having both the products and reactants with equal concentrations at equilibrium is very difficult to produce. That’s probably why lavelle mentioned that.
by Jalaia Jackson 2G
Tue Dec 15, 2020 12:16 pm
Forum: Bronsted Acids & Bases
Topic: lewis vs bronsted
Replies: 8
Views: 57

Re: lewis vs bronsted

Here's a good image for simplification. I hope it helps.
iii7lhCaSNd6lh.aSosLPA.png
by Jalaia Jackson 2G
Tue Dec 15, 2020 12:11 pm
Forum: Student Social/Study Group
Topic: Winter Break
Replies: 44
Views: 314

Re: Winter Break

I think doing practice problems and just watching some videos will be good over the break. Don't overload yourself, remember you are on break.
by Jalaia Jackson 2G
Tue Dec 15, 2020 12:07 pm
Forum: Student Social/Study Group
Topic: Staying Motivated
Replies: 20
Views: 168

Re: Staying Motivated

I feel like one way to stay motivated is to set a schedule for yourself and pace yourself. Write out everything you want to accomplish, so you can check it off as you go. Give yourself 15-30 minute breaks every two hours or so, so you don't get fatigued. Also, act like you're still going to class in...
by Jalaia Jackson 2G
Tue Dec 15, 2020 12:02 pm
Forum: Lewis Acids & Bases
Topic: Classifying Other
Replies: 4
Views: 20

Classifying Other

When classifying strong & weak acids, and strong & weak bases, I was curious when do we classify a compound as Other? Just like in the Sapling HW for example.
by Jalaia Jackson 2G
Tue Dec 15, 2020 11:57 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Calculating pH help
Replies: 5
Views: 54

Calculating pH help

When I was doing the Sapling HW on Sunday I found a really good picture that helped me. I hope it can help anyone that needs it.

Image
by Jalaia Jackson 2G
Sun Dec 06, 2020 1:01 pm
Forum: Naming
Topic: Naming Practice
Replies: 4
Views: 52

Naming Practice

If anyone needs help naming coordination compounds I found this website extremely helpful:
http://www.chemistry.wustl.edu/~edudev/LabTutorials/naming_coord_comp.html
by Jalaia Jackson 2G
Sun Dec 06, 2020 12:53 pm
Forum: Naming
Topic: Naming Coordination Compounds
Replies: 9
Views: 78

Re: Naming Coordination Compounds

As everyone else mentioned, you only need to add -ate, when the coordination complex has an overall negative charge. Here's a website link that I found was helpful. http://www.chemistry.wustl.edu/~edudev/LabTutorials/naming_coord_comp.html
by Jalaia Jackson 2G
Sun Dec 06, 2020 12:33 pm
Forum: Dipole Moments
Topic: Dipole canceling
Replies: 13
Views: 115

Dipole canceling

So as long as the dipole moments cancel out in a molecule it is considered nonpolar? I was thinking about this because I know bonds can be polar from differences in electronegativity, but based on the shape the molecule can still be nonpolar, right?
by Jalaia Jackson 2G
Sun Dec 06, 2020 12:29 pm
Forum: Biological Examples
Topic: Complex Ion Biological Importance
Replies: 3
Views: 47

Complex Ion Biological Importance

How is a complex ion important for biological processes? Or is it important at all?
by Jalaia Jackson 2G
Sun Dec 06, 2020 12:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pair Locations
Replies: 6
Views: 76

Lone Pair Locations

How would you explain why lone pairs are more likely to be found in certain locations around a central atom? Thanks.
by Jalaia Jackson 2G
Sun Nov 29, 2020 1:01 am
Forum: Student Social/Study Group
Topic: Week 8/9 Thoughts/Worries
Replies: 66
Views: 513

Week 8/9 Thoughts/Worries

How does everyone feel about the class so far? I feel like it is going well, there are some points where I could've done better. Does anyone feel the same?
by Jalaia Jackson 2G
Sun Nov 29, 2020 12:58 am
Forum: Determining Molecular Shape (VSEPR)
Topic: What is coplanar?
Replies: 8
Views: 77

What is coplanar?

How does an even number lead to a coplanar on a molecule? Are coplanars important to molecule structure?
by Jalaia Jackson 2G
Sun Nov 29, 2020 12:44 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8812
Views: 1496170

Re: Post All Chemistry Jokes Here

Why are chemists so great at solving problems? Because they have all the solutions.

Why did the white bear dissolve in water? Because it was a polar bear.

A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."
by Jalaia Jackson 2G
Sun Nov 29, 2020 12:34 am
Forum: Student Social/Study Group
Topic: Chemistry Among Us
Replies: 43
Views: 525

Re: Chemistry Among Us

Chapter 2: Yellow decides to follow Green. It was odd that Green would leave right as the reactor went off. Yellow thought to themselves, 'I better be careful, Green could be the Imposter.' You follow behind Green catching up with them in weapons. They're standing in front of the download data righ...
by Jalaia Jackson 2G
Sun Nov 29, 2020 12:07 am
Forum: Student Social/Study Group
Topic: Studying From Home
Replies: 91
Views: 597

Re: Studying From Home

I feel as though one way to make studying at home better is to: 1. Find an environment that suits you. 2. Mentally prepare and take care of yourself. 3. Plan out what you have to do, to keep yourself on track. 4. Write down anything you need clarification on, for any class. 5. Make time for office h...
by Jalaia Jackson 2G
Sun Nov 29, 2020 12:03 am
Forum: Sigma & Pi Bonds
Topic: Delocalized π bonds
Replies: 6
Views: 30

Delocalized π bonds

So in terms of Lewis structures, delocalized π bonds can only occur with resonance structures, or even if a molecule doesn't have a resonance structure can delocalized π bonds exist? I'm referring to the solution of question 16 on Sapling just for clarification.
by Jalaia Jackson 2G
Sun Nov 22, 2020 5:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Stable Geometry
Replies: 2
Views: 19

Stable Geometry

On one of the questions for Sapling, the solution mentioned that the most stable geometry is an arrangement that keeps the atoms or electrons bonded to the central atom as far apart as possible. Why is this true? Does it have something to do with electron-electron repulsion?
by Jalaia Jackson 2G
Sun Nov 22, 2020 5:40 pm
Forum: General Science Questions
Topic: # of chem posts
Replies: 27
Views: 338

Re: # of chem posts

As mentioned before you should have 35 posts and 50 by the end of the quarter. Make sure to check the dates to see how often you've been posting per week.
by Jalaia Jackson 2G
Sun Nov 22, 2020 5:38 pm
Forum: Student Social/Study Group
Topic: Lewis Structure
Replies: 4
Views: 19

Re: Lewis Structure

For Lewis structures, the octet rule can be violated by elements that use the d-orbitals found in the third principal energy level and greater (n=3...5, 6). S, P, Si, and Cl are some examples of elements that form an expanded octet.
by Jalaia Jackson 2G
Sun Nov 22, 2020 5:33 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 120
Views: 633

Re: Exercising Our Minds and Bodies

Nane Onanyan 1H wrote:Learning the choreo for "I Cant Stop Me" by twice B)


That's amazing. Twice's choreos are always fun to learn. Hope you have fun.
by Jalaia Jackson 2G
Sun Nov 22, 2020 5:31 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 120
Views: 633

Re: Exercising Our Minds and Bodies

Recently, I've been really into doing yoga. I feel like it is really good to stretch out your body in the morning before sitting in front of a computer screen all day, lol.
by Jalaia Jackson 2G
Sun Nov 22, 2020 5:29 pm
Forum: General Science Questions
Topic: Grades
Replies: 30
Views: 393

Re: Grades

Like everyone else has mentioned, if you ever want to check your grades you can go to my.ucla.edu and go under the Classes tab to find grades and transcripts.
by Jalaia Jackson 2G
Sat Nov 14, 2020 6:25 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation Numbers (Sapling Q.9)
Replies: 2
Views: 33

Oxidation Numbers (Sapling Q.9)

I know Sapling Question.9 asks, "What is the oxidation number of chlorine in the perchlorate ion?" How do I approach this question? Also, has Lavelle talked about oxidation numbers yet?
by Jalaia Jackson 2G
Sat Nov 14, 2020 6:18 pm
Forum: Student Social/Study Group
Topic: Midterm 2
Replies: 22
Views: 135

Re: Midterm 2

I've mostly been practicing using textbook problems and going through the Sapling explanations again. This has been the most helpful for me. Also, since this section is more conceptual try to explain the problems to yourself before you solve/approach them, that might be helpful.
by Jalaia Jackson 2G
Sat Nov 14, 2020 6:12 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8812
Views: 1496170

Re: Post All Chemistry Jokes Here

What was Avogadro’s favorite sport?
-Golf, because he always got a mole-in-one.
by Jalaia Jackson 2G
Sat Nov 14, 2020 6:05 pm
Forum: Bond Lengths & Energies
Topic: Energy released
Replies: 3
Views: 32

Energy released

Which would release more energy, an intermolecular/interionic interaction or an intramolecular bond when broken?
by Jalaia Jackson 2G
Sat Nov 14, 2020 5:50 pm
Forum: Lewis Acids & Bases
Topic: Acids and Bases Recognition
Replies: 3
Views: 47

Acids and Bases Recognition

I know for me I had trouble identifying Lewis acids and bases. Especially for Sapling problem # 6. I found this picture to be helpful as well as writing out the Lewis structures.
LAB_types.png
by Jalaia Jackson 2G
Mon Nov 09, 2020 10:39 pm
Forum: Student Social/Study Group
Topic: Midterm 2 Study Group
Replies: 25
Views: 167

Re: Midterm 2 Study Group

This is so cool. Thanks for putting this together.
by Jalaia Jackson 2G
Mon Nov 09, 2020 1:52 pm
Forum: Student Social/Study Group
Topic: Chemistry Among Us
Replies: 43
Views: 525

Re: Chemistry Among Us

Hi guys, I am back once more for some chemistry fun. This week I wanted to do Among Us, where I let you pick choices, and then the next day I respond with the next chapter/choice. Have fun. Chapter 1: The Missing Valence The clock reads 8:35 AM. You are Yellow, tasked with checking that all the val...
by Jalaia Jackson 2G
Sun Nov 08, 2020 2:22 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 189
Views: 1226

Re: Favorite TV shows

I 100% recommend watching the vampire diaries, gossip girl,new girl, young and hungry, and honestly I have so many more suggestions!! hmu if you need more ideas :) Your taste is amazing. I just finished binge-watching Vampire Diaries and The Originals too. Absolutely 10/10. I also started watching ...
by Jalaia Jackson 2G
Sun Nov 08, 2020 2:19 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 189
Views: 1226

Re: Favorite TV shows

Hello! First off, I've watched a LOT of the recommendations above + I would say all of them are really good! Second, I just wanted to add a recommendation of my own, especially if you like crime/forensics. It's called Bones, and I think it's on Hulu (?) Feel free to let me know what you think! Yes,...
by Jalaia Jackson 2G
Sun Nov 08, 2020 2:08 pm
Forum: Dipole Moments
Topic: Hydrogen bonds
Replies: 9
Views: 231

Re: Hydrogen bonds

Like, everyone else has mentioned a hydrogen bond occurs when a highly electronegative N, O, or F atom shares a lone pair of electrons with an electron-deficient H atom. O---H---O for example, like #14 on Sapling.
by Jalaia Jackson 2G
Sun Nov 08, 2020 1:47 pm
Forum: Student Social/Study Group
Topic: Chemistry Among Us
Replies: 43
Views: 525

Chemistry Among Us

Hi guys, I am back once more for some chemistry fun. This week I wanted to do Among Us, where I let you pick choices, and then the next day I respond with the next chapter/choice. Have fun. Chapter 2 is live scroll down to see it and leave your replies!!!! Chapter 3 is LIVEEEE! Scroll down and leave...
by Jalaia Jackson 2G
Sun Nov 08, 2020 1:33 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 126
Views: 751

Re: How to relax

I love revisiting my childhood by watching all of my past favorite television shows. Furthermore, I find this so interesting as I am able to see the show from a different perspective than I did as a 6th grader in middle school. This allows me to understand parts of the show that I never was able to...
by Jalaia Jackson 2G
Sun Nov 08, 2020 1:29 pm
Forum: Resonance Structures
Topic: Resonance & Stability
Replies: 4
Views: 33

Resonance & Stability

Why is a molecule with several resonance structures, more stable than one with fewer? Does it have something to do with the ability to change where the bonds are placed or the delocalization of electrons?
by Jalaia Jackson 2G
Sun Nov 08, 2020 1:23 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Electronegativity & Formal Charge
Replies: 3
Views: 24

Electronegativity & Formal Charge

When calculating the formal charge, is it more favorable for any charges to be on the more electronegative atoms? Also, why do we not want our central atom to have a charge? Thanks.
by Jalaia Jackson 2G
Sun Nov 08, 2020 1:14 pm
Forum: Ionic & Covalent Bonds
Topic: Hydrogen Bonds
Replies: 3
Views: 59

Hydrogen Bonds

How does the size and shape of a molecule limit the number of hydrogen bonds formed? I was thinking about this from the Sapling question about the Urea molecule.
by Jalaia Jackson 2G
Sat Oct 31, 2020 8:36 pm
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 390

Re: Homework due date

I would assume by Sunday night, they mean 11:59 pm Sunday. Especially, because it says "Sunday at Midnight."
by Jalaia Jackson 2G
Sat Oct 31, 2020 8:32 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Wave Function Quantum Numbers
Replies: 11
Views: 116

Re: Wave Function Quantum Numbers

I also found a picture that assisted me. Hopefully, it can help a bit.
2yVtmDMPT5ORfR49I4nL_q-20numbers.png
2yVtmDMPT5ORfR49I4nL_q-20numbers.png (10.49 KiB) Viewed 66 times
by Jalaia Jackson 2G
Sat Oct 31, 2020 7:52 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 189
Views: 1226

Favorite TV shows

Hey, everyone. I was wondering what are some good show recommendations to watch or some of your favorite childhood shows. Recently, I have watched Castlevania 10/10, and when I was younger I loved Total Drama Island, also a 10/10.
by Jalaia Jackson 2G
Sat Oct 31, 2020 7:44 pm
Forum: Photoelectric Effect
Topic: Lyman Series
Replies: 30
Views: 221

Re: Lyman Series

This is how I remembered it: The Lyman series corresponds to UV light and the electrons rest at the energy level n=1. While the Balmer series corresponds to visible light and the electron's rest at the energy level n=2.
by Jalaia Jackson 2G
Sat Oct 31, 2020 7:40 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atom and Ionic Radius
Replies: 4
Views: 68

Atom and Ionic Radius

How does electron repulsion contribute to the increase or decrease of the radius size? Thank you.
by Jalaia Jackson 2G
Sat Oct 24, 2020 9:53 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Electron Transition Series
Replies: 2
Views: 44

Electron Transition Series

Are we going to be asked questions like “What series would this transition belong to?” On the midterm or is this something I shouldn’t worry about?
by Jalaia Jackson 2G
Sat Oct 24, 2020 9:31 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 126
Views: 751

How to relax

What do you guys like to do to relax when not doing work? I usually watch Netflix, play with my dog, or play video games.
by Jalaia Jackson 2G
Sat Oct 24, 2020 9:27 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg’s Constant
Replies: 6
Views: 82

Rydberg’s Constant

During one of the review sessions someone said something that peeked my interest. Is it true that N1 is initial if it’s absorption and final if it is emission?Because in the textbook it is written as 1/n1 first.
by Jalaia Jackson 2G
Sat Oct 24, 2020 9:17 pm
Forum: DeBroglie Equation
Topic: Advice for Correct Units for Midterm
Replies: 8
Views: 84

Re: Advice for Correct Units for Midterm

Wow, I never really thought of this. Sometimes when solving the equations I just plug in the numbers and add the units at the end. This is very helpful, thank you.
by Jalaia Jackson 2G
Sat Oct 24, 2020 9:12 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Multi-Electron Atoms
Replies: 3
Views: 36

Multi-Electron Atoms

What are the additional factors that effect the e- energy electrostatic potential energy in Multi-Electron Atoms? I know Lavelle mentioned it in his slides, but I don’t think I have a full grasp of the concept.
by Jalaia Jackson 2G
Sat Oct 17, 2020 8:45 pm
Forum: Properties of Light
Topic: Frequency vs Wavelength
Replies: 22
Views: 168

Re: Frequency vs Wavelength

Just like everyone has mentioned above frequency and wavelength have an inverse relationship. When you want to increase the frequency the wavelength will decrease, while if the frequency decreases the wavelength will grow bigger. The difference in wavelengths is how you determine the types of waves ...
by Jalaia Jackson 2G
Sat Oct 17, 2020 8:40 pm
Forum: General Science Questions
Topic: Writing Formulas
Replies: 10
Views: 80

Writing Formulas

For the future would it be good to know how to write the formula of a molecule when just given the name such as, disulfur dichloride or sulfuric acid?
by Jalaia Jackson 2G
Sat Oct 17, 2020 2:25 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Indeterminacy of position
Replies: 2
Views: 34

Indeterminacy of position

I was looking at one of the module problems #17, the one that mentions one hundredth of the speed of light and was confused on where does speed fit into Heisenberg’s equation.
by Jalaia Jackson 2G
Thu Oct 15, 2020 10:23 pm
Forum: Photoelectric Effect
Topic: Mass of an object
Replies: 5
Views: 66

Mass of an object

So when the mass of an object is presented as grams or kilograms in a problem, how do we determine in a form such as ( 1.93 x 10^n), what the exponent will be. I feel like sometimes I am using the wrong exponent when converting numbers in the questions. Thanks.
by Jalaia Jackson 2G
Thu Oct 15, 2020 10:19 pm
Forum: DeBroglie Equation
Topic: Wavelike Properties
Replies: 4
Views: 65

Wavelike Properties

So based on my understanding, do only atomic sized things have wavelike properties. Because I recall on Prof. Lavelle’s lecture he said any moving particle with momentum has wavelike properties. Thanks.
by Jalaia Jackson 2G
Sat Oct 10, 2020 8:59 pm
Forum: Significant Figures
Topic: Number of Sig Figs according to a question.
Replies: 5
Views: 23

Re: Number of Sig Figs according to a question.

From my understanding of significant figures pay attention to the leading zeros and trailing zeros. Leading zeros would be 0.00785 so the zeros to the left after the decimal wouldn’t count so the answer would only have 3 significant figures. For trailing significant figures it would be like 876000 t...
by Jalaia Jackson 2G
Sat Oct 10, 2020 8:50 pm
Forum: Properties of Light
Topic: Sun Spectrum
Replies: 3
Views: 37

Sun Spectrum

How wide is the spectrum of frequencies that the sun emits? I know the professor mentioned, gamma and ultraviolet, but does the sun encompass all know waves the in electromagnetic spectrum?
by Jalaia Jackson 2G
Thu Oct 08, 2020 5:52 pm
Forum: Properties of Light
Topic: Photoelectric Effect Formulas
Replies: 3
Views: 56

Photoelectric Effect Formulas

I was watching one of the modules, the Photoelectric Effect one and was curious if we would need to memorize the formulas or will they be given us to use on the midterms? Also, would it be helpful to memorize some of the formulas in general?
by Jalaia Jackson 2G
Wed Oct 07, 2020 10:07 pm
Forum: Properties of Light
Topic: Classical mechanics vs. Quantum mechanics
Replies: 1
Views: 40

Classical mechanics vs. Quantum mechanics

Based on Lavelle's example of water in an experiment with a dial, I was curious that based on this metaphorical experiment does that mean that Classical and Quantum mechanics can both operate at the same time/space, and just Quantum mechanics is "activated" on a molecular scale? Thank you ...
by Jalaia Jackson 2G
Mon Oct 05, 2020 10:40 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 488

Re: Periodic Table

Agreeing with the other comments, I don’t think you should be worried about memorizing the table. I do think it is good advice to try and remember some of the most common element’s atomic number and mass just to make it easier during tests, so you won’t have to spend time looking for them.

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