Search found 65 matches

by Katie Phan 1K
Sat Jan 23, 2021 7:06 pm
Forum: General Science Questions
Topic: Second Deprotonations
Replies: 6
Views: 25

Re: Second Deprotonations

2nd protonation is usually much smaller than 1st anyway.
by Katie Phan 1K
Sat Jan 23, 2021 7:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Periodic Tables on Midterm
Replies: 23
Views: 48

Re: Periodic Tables on Midterm

Yes and I think we have that formula/constant sheet too!
by Katie Phan 1K
Sat Jan 23, 2021 7:03 pm
Forum: Student Social/Study Group
Topic: Midterm Study Tips
Replies: 41
Views: 86

Re: Midterm Study Tips

I like reading the textbook and looking at the problems.
by Katie Phan 1K
Sat Jan 23, 2021 7:02 pm
Forum: *Calculations Using ΔG° = -RT ln K
Topic: Vocabulary
Replies: 11
Views: 2585

Re: Vocabulary

Yes!
by Katie Phan 1K
Sat Jan 23, 2021 7:01 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Tables
Replies: 31
Views: 64

Re: ICE Tables

Just the coefficients!
by Katie Phan 1K
Sun Jan 17, 2021 12:24 am
Forum: Administrative Questions and Class Announcements
Topic: UA Worksheets
Replies: 2
Views: 24

Re: UA Worksheets

Check this class's groupme! I know a lot of people post links to shared folders full of UA worksheets.
by Katie Phan 1K
Sun Jan 17, 2021 12:21 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Strong vs Weak Acids and Bases
Replies: 7
Views: 30

Re: Strong vs Weak Acids and Bases

It'd probably be best to memorize the strong acids/bases as there aren't that many.
by Katie Phan 1K
Sun Jan 17, 2021 12:20 am
Forum: Administrative Questions and Class Announcements
Topic: Calculator for exams
Replies: 28
Views: 85

Re: Calculator for exams

Either is fine, I think. I prefer graphing for obvious reasons.
by Katie Phan 1K
Sun Jan 17, 2021 12:18 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Kelvin or Celsius?
Replies: 70
Views: 1361

Re: Kelvin or Celsius?

Kelvin
by Katie Phan 1K
Sun Jan 17, 2021 12:17 am
Forum: *Alkanes
Topic: Alkaline environment
Replies: 5
Views: 350

Re: Alkaline environment

... is this why they said to drink bleach?
by Katie Phan 1K
Thu Jan 07, 2021 4:43 pm
Forum: General Science Questions
Topic: mole vs. M
Replies: 16
Views: 108

Re: mole vs. M

M is molarity. Moles will be referred to as mol or moles.
by Katie Phan 1K
Thu Jan 07, 2021 4:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Lecture Format
Replies: 22
Views: 119

Re: Lecture Format

I wonder what the logistics of having midterms/tests during scheduled lecture times will be like.
by Katie Phan 1K
Thu Jan 07, 2021 4:38 pm
Forum: Student Social/Study Group
Topic: Thoughts on Switching Majors?
Replies: 31
Views: 243

Re: Thoughts on Switching Majors?

If you really loathe the major you're in right now, switch to something that you enjoy! I don't think the process is too difficult unless you're switching into a whole other school/college.
by Katie Phan 1K
Thu Jan 07, 2021 4:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 106
Views: 7178

Re: Accessing the E-textbook [ENDORSED]

Sapling is required! In the past, I believe it wasn't, but now it is. You buy the bundle that Lavelle has up on the site, it's around $70ish dollars I believe for multiterm access. It gives you access to the ebook and other resources. Sapling is also where you do the homework which I believe is wort...
by Katie Phan 1K
Thu Jan 07, 2021 4:11 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Posts in 14B [ENDORSED]
Replies: 121
Views: 1845

Re: Chemistry Posts in 14B [ENDORSED]

Just an FYI, I believe a bot checks if you've made 5 chemistry community posts every week.
by Katie Phan 1K
Sat Dec 12, 2020 2:27 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 226
Views: 35997

Re: Final Jitters

Don't psych yourself out! Study as best as you can and whatever happens, happens! If you've done all that you can do then just have confidence in the fact that you actively prepared yourself for the test.
by Katie Phan 1K
Fri Dec 11, 2020 12:41 pm
Forum: General Science Questions
Topic: Textbook Questions on the Final
Replies: 11
Views: 107

Re: Textbook Questions on the Final

I'm sure some questions will be formatted like the textbook questions but not all of them.
by Katie Phan 1K
Fri Dec 11, 2020 12:40 pm
Forum: Amphoteric Compounds
Topic: Amphoteric
Replies: 8
Views: 90

Re: Amphoteric

I don't think we need to know this.
by Katie Phan 1K
Fri Dec 11, 2020 12:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Content
Replies: 18
Views: 166

Re: Final Content

It'll be cumulative based on how much time we spent on each topic in lectures.
by Katie Phan 1K
Fri Dec 11, 2020 12:36 pm
Forum: Significant Figures
Topic: Things to remember for final?
Replies: 20
Views: 145

Re: Things to remember for final?

The "SO I BRought NO CLean CLOthes" thing is genius. I typically just memorized them all.
by Katie Phan 1K
Fri Dec 04, 2020 7:02 pm
Forum: Molarity, Solutions, Dilutions
Topic: Stuck on Sapling HW
Replies: 14
Views: 199

Re: Stuck on Sapling HW

Hey everyone, I was wondering if anyone on here could tutor me on molarity, i cant seem to undestand it all the way through. If you can tutor me please reply and ill frind a way to conatact you. Watch the videos that Lavelle has up on his website! And do the audio-visual units about molarity/diluti...
by Katie Phan 1K
Fri Dec 04, 2020 7:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Grade Cutoffs
Replies: 4
Views: 90

Re: Grade Cutoffs

I think Lavelle said something about finishing up the syllabus? So maybe he'll put grade breakdowns on that.
by Katie Phan 1K
Fri Dec 04, 2020 6:59 pm
Forum: General Science Questions
Topic: Tricks for Knowing Locations of Metals and Nonmetals on Periodic Table
Replies: 8
Views: 81

Re: Tricks for Knowing Locations of Metals and Nonmetals on Periodic Table

What everyone else said about the staircase! Divide up the periodic table into blocks and you'll get it in no time.
by Katie Phan 1K
Fri Dec 04, 2020 6:57 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Date
Replies: 21
Views: 219

Re: Final Exam Date

I honestly think we'll still be having lectures week 10.
by Katie Phan 1K
Fri Dec 04, 2020 6:55 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8544
Views: 1474028

Re: Post All Chemistry Jokes Here

choose your fighter https://scontent-sea1-1.xx.fbcdn.net/v/t1.0-9/88064312_2557157307726045_2653155032798593024_n.jpg?_nc_cat=106&ccb=2&_nc_sid=8bfeb9&_nc_ohc=4QXy_lLPnE0AX97wGTR&_nc_ht=scontent-sea1-1.xx&oh=2e9589e2bd801080c24a95d67a9a8445&oe=5FF0E396
by Katie Phan 1K
Sun Nov 29, 2020 11:44 pm
Forum: Sigma & Pi Bonds
Topic: sapling no 18
Replies: 5
Views: 42

Re: sapling no 18

What others have said about triangular/cyclic shape is correct.
by Katie Phan 1K
Sun Nov 29, 2020 11:43 pm
Forum: Empirical & Molecular Formulas
Topic: Periodic Table and Calculations
Replies: 20
Views: 161

Re: Periodic Table and Calculations

Honestly, any graphing calculator will do. Scientific is fine and all but graphic calculators are better when dealing with so many calculations in chemistry and large numbers.
by Katie Phan 1K
Sun Nov 29, 2020 11:42 pm
Forum: Properties of Light
Topic: Study Advice
Replies: 50
Views: 295

Re: Study Advice

I haven't been to sessions/workshops. I find that just taking info straight from the book is really helpful, as well as supplementing with info from lectures.
by Katie Phan 1K
Sun Nov 29, 2020 11:41 pm
Forum: Balancing Chemical Reactions
Topic: States of matter in chem equations
Replies: 13
Views: 115

Re: States of matter in chem equations

Keeping track of states will be useful when you're doing total/net ionic equations and trying to see if a precipitate is formed.
by Katie Phan 1K
Sun Nov 29, 2020 11:40 pm
Forum: Significant Figures
Topic: 40. versus 40
Replies: 23
Views: 181

Re: 40. versus 40

Victor's summary is good!
by Katie Phan 1K
Mon Nov 23, 2020 12:34 am
Forum: General Science Questions
Topic: Finals
Replies: 39
Views: 380

Re: Finals

It covers everything! I'm pretty sure it'll be the same format as the midterms.
by Katie Phan 1K
Mon Nov 23, 2020 12:27 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Scores
Replies: 28
Views: 204

Re: Midterm 2 Scores

Try not to think about it so much. Enjoy your Thanksgiving and be present!
by Katie Phan 1K
Mon Nov 23, 2020 12:25 am
Forum: Administrative Questions and Class Announcements
Topic: grades
Replies: 10
Views: 154

grades

Does anyone know what the letter grades are in regards to percentages/points? There's no scale that I know of.
by Katie Phan 1K
Mon Nov 16, 2020 12:16 am
Forum: Calculating the pH of Salt Solutions
Topic: Is pH normally taken at equilibrium concentrations?
Replies: 7
Views: 247

Re: Is pH normally taken at equilibrium concentrations?

It usually is implied that it's at equilibrium.
by Katie Phan 1K
Mon Nov 16, 2020 12:15 am
Forum: Ionic & Covalent Bonds
Topic: Bond Length
Replies: 6
Views: 42

Re: Bond Length

Bond length is basically associated with the energy required to break the bonds. Bonds that are shorter are stronger since the atoms/molecules are more tightly held, making it harder to break them apart.
by Katie Phan 1K
Mon Nov 16, 2020 12:13 am
Forum: Dipole Moments
Topic: London Dispersion Forces
Replies: 8
Views: 70

Re: London Dispersion Forces

They all have dispersion forces because at some moment in time, nonpolar molecules can have temporary dipoles.
by Katie Phan 1K
Mon Nov 16, 2020 12:11 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro constant
Replies: 16
Views: 154

Re: Avogadro constant

Everyone else put it perfectly! Hope you understand now.
by Katie Phan 1K
Sun Nov 15, 2020 8:55 pm
Forum: General Science Questions
Topic: Midterm 2
Replies: 12
Views: 91

Midterm 2

Does anyone know what sections of the textbook midterm 2 covers?
by Katie Phan 1K
Fri Nov 06, 2020 12:35 pm
Forum: Resonance Structures
Topic: Faster way to do resonance structures?
Replies: 3
Views: 38

Re: Faster way to do resonance structures?

To my knowledge, there isn't a trick or life hack that will make it faster to do resonance structures.
by Katie Phan 1K
Fri Nov 06, 2020 12:33 pm
Forum: Lewis Acids & Bases
Topic: Octet question
Replies: 7
Views: 63

Re: Octet question

I don't think it's too difficult to memorize the exceptions! Also sometimes when you look at a structure it just makes more sense when you think about its stability and formal change.
by Katie Phan 1K
Fri Nov 06, 2020 12:31 pm
Forum: General Science Questions
Topic: Grade Breakdown
Replies: 32
Views: 351

Re: Grade Breakdown

I'm not sure what the specific grade breakdowns are. Maybe email him?
by Katie Phan 1K
Fri Nov 06, 2020 12:29 pm
Forum: Student Social/Study Group
Topic: Syllabus
Replies: 11
Views: 82

Re: Syllabus

What are you confused about?
by Katie Phan 1K
Fri Nov 06, 2020 12:29 pm
Forum: Administrative Questions and Class Announcements
Topic: Acids & Bases in MT2?
Replies: 4
Views: 19

Re: Acids & Bases in MT2?

I think he's expecting us to know whatever he has talked about in lecture such as lewis acids/bases but nothing else until we go into further depth.
by Katie Phan 1K
Sun Nov 01, 2020 11:14 pm
Forum: SI Units, Unit Conversions
Topic: Memorizing SI Units
Replies: 14
Views: 110

Re: Memorizing SI Units

I don't think we are expected to memorize SI units. The picometer conversion was actually on the formula sheet for the midterm! It was a little hard to find for me too.
by Katie Phan 1K
Sun Nov 01, 2020 11:12 pm
Forum: Properties of Light
Topic: Wavelenght
Replies: 17
Views: 111

Re: Wavelenght

Gamma rays have the smallest wavelengths and therefore have the highest energy as they have high frequency!
by Katie Phan 1K
Sun Nov 01, 2020 11:11 pm
Forum: Trends in The Periodic Table
Topic: Tips for remembering
Replies: 14
Views: 106

Re: Tips for remembering

If you ever forget trends, just think about what you know about atoms. It's better to know the reasons why these trends occur rather than just remembering them. However, I do find it helpful to write arrows on my periodic table just to refer back to.
by Katie Phan 1K
Sun Nov 01, 2020 11:09 pm
Forum: Properties of Electrons
Topic: Sapling 23
Replies: 2
Views: 35

Re: Sapling 23

Valerie explained it perfectly!
Just find the energy of the light, convert it to eV, subtract the experimentally measured energy of ejected electrons, then convert the electron affinity to kJ/mole.
by Katie Phan 1K
Sun Nov 01, 2020 10:52 pm
Forum: Properties of Electrons
Topic: Sapling #24
Replies: 7
Views: 72

Sapling #24

Hi. I'm having some trouble with the homework question pertaining to the wave patterns associated with the Bohr orbits of the hydrogen atom. Could someone explain to me what a sinusoidal and constant wavelength around the orbit looks like?
by Katie Phan 1K
Fri Oct 23, 2020 4:53 pm
Forum: Significant Figures
Topic: Quick Sig Fig Question with Addition/Subtraction
Replies: 7
Views: 90

Re: Quick Sig Fig Question with Addition/Subtraction

A good practice is probably rounding at the end!
by Katie Phan 1K
Fri Oct 23, 2020 4:49 pm
Forum: *Black Body Radiation
Topic: Midterm 1
Replies: 15
Views: 286

Re: Midterm 1

It's included in the readings but I think Lavelle said it's not something we need to know.
by Katie Phan 1K
Fri Oct 23, 2020 4:48 pm
Forum: Quantum Numbers and The H-Atom
Topic: Spin Magnetic Quantum Number
Replies: 6
Views: 45

Re: Spin Magnetic Quantum Number

Yes, I don't think you need to know how to determine it, just need to know the quantum numbers.
by Katie Phan 1K
Fri Oct 23, 2020 4:47 pm
Forum: *Shrodinger Equation
Topic: Understanding of Shrodinger Equation
Replies: 3
Views: 55

Re: Understanding of Shrodinger Equation

If you're still confused just look in the textbook! It'll tell you what exactly it's used for.
by Katie Phan 1K
Fri Oct 23, 2020 4:46 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Q
Replies: 1
Views: 45

Midterm Q

Is Schrodinger's equation on the midterm and if so, to what extent, if at all?
by Katie Phan 1K
Thu Oct 15, 2020 7:04 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: WK 2 Sapling #5
Replies: 4
Views: 71

Re: WK 2 Sapling #5

From n=6, an electron could drop to n= 5,4,3,2,1 so you have 5 spectral lines. The highest energy transition would be from n=6 to n=1, which would be the lower wavelength when thinking about the range. The lowest energy transition would be from n=6 to n=5, which would be the larger wavelength when t...
by Katie Phan 1K
Thu Oct 15, 2020 6:55 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Atomic Spectroscopy
Replies: 5
Views: 45

Re: Atomic Spectroscopy

It wouldn't be wavelike properties since it is not continuous like a wave, rather it is quantized.
by Katie Phan 1K
Thu Oct 15, 2020 6:53 pm
Forum: *Black Body Radiation
Topic: Sapling Wk 2+3 #7
Replies: 3
Views: 72

Re: Sapling Wk 2+3 #7

to find the mass, divide the molar mass of O2 by Avogadro's number and then convert it to kg!
by Katie Phan 1K
Thu Oct 15, 2020 6:50 pm
Forum: SI Units, Unit Conversions
Topic: Webcam
Replies: 11
Views: 126

Re: Webcam

If so, you could probably get a webcam on Amazon for like $10.
by Katie Phan 1K
Thu Oct 15, 2020 4:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling HW
Replies: 1
Views: 24

Re: Sapling HW

Just kidding, i figured it out.
by Katie Phan 1K
Thu Oct 15, 2020 4:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling HW
Replies: 1
Views: 24

Sapling HW

I'm kinda having trouble superscripting on Sapling? I'm trying to do it for an electron configuration but can't seem to do it.
by Katie Phan 1K
Thu Oct 08, 2020 4:33 pm
Forum: Student Social/Study Group
Topic: STEM clubs
Replies: 8
Views: 119

Re: STEM clubs

These aren't just strictly STEM clubs but if you're looking for other clubs and activities there's a mega thread on reddit!
https://www.reddit.com/r/ucla/comments/ ... o_get_the/
by Katie Phan 1K
Thu Oct 08, 2020 4:30 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic bonds in solutions
Replies: 9
Views: 190

Re: Ionic bonds in solutions

I think there's a lot of confusion with whether dissolving salt in water is a chemical or physical change since when you boil off water you end up with salt, but I'm going to have to agree with Sami and Trisha since ionic bonds are intramolecular.
by Katie Phan 1K
Thu Oct 08, 2020 4:21 pm
Forum: Empirical & Molecular Formulas
Topic: Writing Formula Order
Replies: 6
Views: 46

Re: Writing Formula Order

I forgot to mention in my previous post but I just realized that other exceptions would be things like oxides and acids. Acids usually begin with H and oxides end in O. Another example would be hydroxides since they end in OH.
by Katie Phan 1K
Thu Oct 08, 2020 4:19 pm
Forum: Empirical & Molecular Formulas
Topic: Writing Formula Order
Replies: 6
Views: 46

Re: Writing Formula Order

Some exceptions to what the other's have stated would be in the case of ionic compounds in which the cation is listed first and then the anion, regardless of alphabetical order.
by Katie Phan 1K
Thu Oct 08, 2020 4:14 pm
Forum: Balancing Chemical Reactions
Topic: State in chemical reactions
Replies: 13
Views: 116

Re: State in chemical reactions

Please, someone, correct me if I am wrong but I believe all ionic compounds are solids. I think they're important when you're trying to contextualize a homework problem and such but I don't think it's necessary to always write them.

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