Search found 70 matches
- Tue Mar 16, 2021 8:59 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: rust
- Replies: 8
- Views: 1320
Re: rust
salt increases water's ability to carry a current at the surface of a metal hence increase rusting
- Tue Mar 16, 2021 8:58 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Sapling Week 7/8 #18
- Replies: 7
- Views: 708
Re: Sapling Week 7/8 #18
unbalanced equation is:
Fe + H2O + O2 -> Fe2O3∙3H2O
----coefficients are missing
Fe + H2O + O2 -> Fe2O3∙3H2O
----coefficients are missing
- Tue Mar 16, 2021 8:57 am
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: pH
- Replies: 17
- Views: 954
Re: pH
pH measures the concentration of H+ ions in a solution, through this we can know where it lands on the scale of 1-14
- Tue Mar 16, 2021 8:55 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Catalyst
- Replies: 27
- Views: 1165
Re: Catalyst
by lowering the activation energy it increases the speed of both forward and reverse pathways of the reaction
- Tue Mar 16, 2021 8:54 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Catalyst
- Replies: 30
- Views: 2174
Re: Catalyst
Catalyst aren't products or reactants, therefore a catalyst will not appear in the overall reaction equation; its usually presented as intermediates in the steps and gets canceled during the process
- Tue Mar 16, 2021 8:52 am
- Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
- Topic: Will the Final for 14B have Identification?
- Replies: 9
- Views: 6033
Re: Will the Final for 14B have Identification?
it won't be on the final because its no longer covered in the curriculum, therefore not needed to know for the exams
- Tue Mar 16, 2021 8:50 am
- Forum: *Enzyme Kinetics
- Topic: intermediates vs. catalysts
- Replies: 31
- Views: 1448
Re: intermediates vs. catalysts
both cancel out at the end; intermediates are made in a reaction by first appearing as a product & catalysts are added into a reaction
Re: draw
For the final in Chem 14b we did NOT have to draw. <--------Chem 14b was taken Winter Quarter 2021 COVID-19 Zoom university
Our tests were all multiple choice and online, I can't tell you how in person will be
Our tests were all multiple choice and online, I can't tell you how in person will be
- Tue Mar 16, 2021 8:44 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: percent ionization
- Replies: 7
- Views: 3730
Re: percent ionization
Percent deprotonation = % of substance that lost its proton
Percent protonation = % of substance that gained a proton
Percent protonation = % of substance that gained a proton
- Tue Mar 16, 2021 8:42 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: polyprotic acids
- Replies: 10
- Views: 678
Re: polyprotic acids
If the 2nd deprotonation of Ka is less than a 1/1000 of the 1st deprotonation of Ka, ignore the 2nd deprotonation reaction
- Tue Mar 16, 2021 8:39 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q Calculations
- Replies: 21
- Views: 1091
Re: Q Calculations
units for Q are mol/L, mol/L is the standard form; unless the problem, wants them in different units
- Tue Mar 16, 2021 8:37 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ICE Chart Question
- Replies: 26
- Views: 1612
Re: ICE Chart Question
even when you decrease by -2x you still have to include the ^2 in the equilibrium concentration
- Tue Mar 16, 2021 8:35 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Ignoring second deprotonations
- Replies: 5
- Views: 677
Re: Ignoring second deprotonations
The first deprotonation is ignored when dealing with a strong acid, for weak acids, ignore the second deprotonation.
- Tue Mar 16, 2021 8:32 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: pka vs ka
- Replies: 28
- Views: 1429
Re: pka vs ka
Both pKa and pKb use -log values with the same base pKa+pKb is the same as saying -log(Ka*Kb)
- Tue Mar 16, 2021 8:29 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kp Units
- Replies: 5
- Views: 457
Re: Kp Units
I use bar when calculating however you can also use atm, both are similar in value so either would work!
- Tue Mar 16, 2021 8:27 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K
- Replies: 33
- Views: 1443
Re: K
Kc and K are calculate & are the same thing K it is just used for molar concentrations while Kp is used for partial pressure
- Tue Mar 16, 2021 8:25 am
- Forum: Ideal Gases
- Topic: Temperature
- Replies: 99
- Views: 7030
Re: Temperature
You should assume it's 25ºC or 298K just make sure to look at what the problem is asking
- Sun Mar 14, 2021 11:07 pm
- Forum: Student Social/Study Group
- Topic: On Campus class vs. remote
- Replies: 21
- Views: 1508
Re: On Campus class vs. remote
I hope they do hybrid, I can't imagine how 300+ lecture halls are going to be. If they try and solution this by making enrollment spaces be less than I dont see how people will be able to enroll into the classes they need. I mean people already have a hard time getting classes
- Sun Mar 14, 2021 11:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Grades
- Replies: 19
- Views: 1623
Re: Final Grades
The turnaround for tests was usually a week for this class I would expect by next Sunday to have our final exam grades
- Sun Mar 14, 2021 11:01 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Spring Forward March 14! Make sure to set your clocks!
- Replies: 18
- Views: 1837
Re: Spring Forward March 14! Make sure to set your clocks!
Woke up with an almost heart attack thinking I overslept lol, thankfully iPhones change the time automatically !!!!
- Sun Mar 14, 2021 10:57 pm
- Forum: General Science Questions
- Topic: Final thoughts
- Replies: 28
- Views: 4906
Re: Final thoughts
I thought the final was better than the first Midterm, but worse than the second midterm, overall quite fair
- Sun Mar 14, 2021 10:56 pm
- Forum: Student Social/Study Group
- Topic: Planning on dorming in the Fall?
- Replies: 61
- Views: 3726
Re: Planning on dorming in the Fall?
I'm not completely sure, to be quite frank I like being back home. However I guess it depends on how the classes will be.
- Sun Mar 07, 2021 8:52 pm
- Forum: Student Social/Study Group
- Topic: What do you miss / What are you looking forward to?
- Replies: 92
- Views: 10660
Re: What do you miss / What are you looking forward to?
I miss making friends in lecture halls I look forward to bcafe and Bplate haha, always the food lol
- Sun Mar 07, 2021 8:36 pm
- Forum: Student Social/Study Group
- Topic: How do you deal with burnout?
- Replies: 144
- Views: 17149
Re: How do you deal with burnout?
I’ve been feeling the burnout alright! What try to do is space out my days give myself breaks a create schedules so that by 4 I’m done with my day.
- Sun Mar 07, 2021 8:30 pm
- Forum: General Science Questions
- Topic: Grade Cutoffs?
- Replies: 15
- Views: 1692
Re: Grade Cutoffs?
Thank you guys!
- Sun Mar 07, 2021 8:29 pm
- Forum: General Science Questions
- Topic: Final Exam
- Replies: 39
- Views: 2216
Re: Final Exam
Should we expect to see an email with details??
- Sun Mar 07, 2021 8:27 pm
- Forum: General Science Questions
- Topic: The Final Countdown
- Replies: 14
- Views: 1230
Re: The Final Countdown
Cant wait for spring break! Quarter isn’t finished but I sure am, counting the days
- Sun Feb 28, 2021 8:30 pm
- Forum: General Science Questions
- Topic: Midterm 2 Reactions
- Replies: 79
- Views: 6653
Re: Midterm 2 Reactions
I am content with my MT2 grade but I really would like top know what problems I got wrong or when I went in the wrong direction so it could help me study for the Final ugh.
- Sun Feb 28, 2021 8:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chemistry Community Points
- Replies: 24
- Views: 1164
Re: Chemistry Community Points
I think you'd be fine if you post more, it just won't count
- Sun Feb 28, 2021 8:25 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 63
- Views: 3761
Re: Final
QUESTION: the final is cumulative right?
- Sun Feb 28, 2021 8:24 pm
- Forum: Student Social/Study Group
- Topic: Moving to Westwood soon. Which restaurants should I visit?
- Replies: 45
- Views: 3049
Re: Moving to Westwood soon. Which restaurants should I visit?
Diddy Riece is okay, I don't think its worth the hype (oops I said it), but have in mind its cash only! Also if you'r e moving to Westwood, you have to at least go once to Fat Sal's!!
- Sun Feb 28, 2021 8:21 pm
- Forum: Student Social/Study Group
- Topic: Fave movie/show
- Replies: 67
- Views: 5096
Re: Fave movie/show
Bridgerton on Netflix--SOOO good, don't recommend watching with family though, but such a binge worthy show!!!
- Sun Feb 21, 2021 10:19 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: pH meter
- Replies: 11
- Views: 703
Re: pH meter
A pH meter measures the acidity of a substance, usually a liquid by the concentration of H+ ions, from this the substance can be categorized as alkaline or acidic
- Sun Feb 21, 2021 10:16 pm
- Forum: Van't Hoff Equation
- Topic: Celcius vs Kelvin for T1 and T2
- Replies: 84
- Views: 7118
Re: Celcius vs Kelvin for T1 and T2
I usually use Kelvin and if the problem gives me temperature in Celsius then I just convert.
- Sun Feb 21, 2021 10:13 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Thermodynamically Favorable
- Replies: 27
- Views: 1954
Re: Thermodynamically Favorable
thermodynamically favorable = enthalpy decreases and entropy increases (negative dG)
- Sun Feb 21, 2021 10:07 pm
- Forum: General Science Questions
- Topic: MT 2 grades
- Replies: 34
- Views: 2042
Re: MT 2 grades
The grades for MT1 were up in like a week id expect the same.
- Tue Feb 16, 2021 9:19 pm
- Forum: General Science Questions
- Topic: Grade Cutoffs?
- Replies: 15
- Views: 1692
Grade Cutoffs?
Im a bit confused with what Dr. Lavelle says that at least 50% is needed for a C-. Does anyone know what the grade cutoffs are for C's, B's, and A's?
- Tue Feb 16, 2021 9:16 pm
- Forum: General Science Questions
- Topic: No Lavelle Chem 14C?
- Replies: 68
- Views: 5296
Re: No Lavelle Chem 14C?
Dr. Castillo is the professor for 14C and it filled up already...
- Sun Feb 14, 2021 11:14 pm
- Forum: Student Social/Study Group
- Topic: Culinary Chemistry
- Replies: 239
- Views: 37625
Re: Culinary Chemistry
This is interesting because my family has had that same debate. How do you feel about adding a few drops of olive oil to the boiling water? My mom has always done this because she says it prevents the pasta from sticking... I read somewhere that putting oil in the water actually coats the pasta wit...
- Sun Feb 14, 2021 10:45 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Can heat capacities be negative?
- Replies: 52
- Views: 14071
Re: Can heat capacities be negative?
Heat capacities can not be negative, they must be positive.
- Sun Feb 14, 2021 10:43 pm
- Forum: Phase Changes & Related Calculations
- Topic: Define Phase Change
- Replies: 78
- Views: 5530
Re: Define Phase Change
Phase change means when a substance changes its state of matter. For instance water going from liquid to solid than gas, each step is a phase change.
- Sun Feb 14, 2021 10:41 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Likeliness to form products/reactants
- Replies: 27
- Views: 986
Re: Likeliness to form products/reactants
It depends on the delta G. If delta G is negative than more products are favored and if delta G is positive than reactants are favored
- Sun Feb 14, 2021 10:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: cc update
- Replies: 23
- Views: 1270
Re: cc update
I wouldn't worry too much, last time Dr. Lavelle emailed us to let us know he was going to upload I assume,e he'll do the same
- Sun Feb 14, 2021 10:37 pm
- Forum: Ideal Gases
- Topic: Chem BL
- Replies: 107
- Views: 8900
Re: Chem BL
I think you'll be good in 14BL its mostly just labs and the exams are very fair!
- Sun Feb 07, 2021 9:08 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Definition of an Inert Gas
- Replies: 15
- Views: 1032
Re: Definition of an Inert Gas
Inert gas= a gas which does not react with the reactants or products of the chemical reaction
- Sun Feb 07, 2021 9:06 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: deltaU
- Replies: 29
- Views: 940
Re: deltaU
∆U = q + w
∆U= change of energy in internal system
∆U= change of energy in internal system
- Sun Feb 07, 2021 9:04 pm
- Forum: Administrative Questions and Class Announcements
- Topic: tips if you're struggling!
- Replies: 77
- Views: 5241
Re: tips if you're struggling!
Thank you for these tips! they are helpful tips and I especially think that they good because I didnt have Lavelle last quarter. Will definitely take these not for considerations--but actually our them into practice for MT2
- Sun Feb 07, 2021 8:54 pm
- Forum: Student Social/Study Group
- Topic: Book Recommendations
- Replies: 135
- Views: 15978
Re: Book Recommendations
Oh my gosh i'm cracking up at the post about the chemical principals,
The duke and I by Julia Quinn!!
The duke and I by Julia Quinn!!
- Sun Feb 07, 2021 8:51 pm
- Forum: General Science Questions
- Topic: Midterm 1 Reactions
- Replies: 70
- Views: 5122
Re: Midterm 1 Reactions
I agree, it was harder than expected but it could’ve just been that I felt time was a factor for it
- Thu Jan 28, 2021 5:01 pm
- Forum: Student Social/Study Group
- Topic: Questions about Friday/Midterm
- Replies: 7
- Views: 280
Re: Questions about Friday/Midterm
Hii, When it was mentioned that our midterm would be during our lecture time, does it mean those who have a 10am lecture will take it at 10am, those who have a 1pm lecture will take it at 1pm, etc.? And does anyone know if there will be a lecture recording on Friday? Just want to plan ahead for the...
- Thu Jan 28, 2021 4:56 pm
- Forum: General Science Questions
- Topic: MT 1 Grades
- Replies: 8
- Views: 441
MT 1 Grades
Does anyone know how fast the turnaround time is for MT 1 grades? Will we know our score right after or does it take time?
- Thu Jan 28, 2021 4:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm 1 Zoom Proctoring
- Replies: 14
- Views: 756
Re: Midterm 1 Zoom Proctoring
Yes! we will have zoom proctoring with a 2nd device, lots of info in his email with MT 1 information
- Thu Jan 28, 2021 4:51 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Partial Credit on MT 1
- Replies: 15
- Views: 822
Re: Partial Credit on MT 1
Dr. Lavelle sent out an email with MT 1 information, I'll include a screenshot of where he talks about partial credit.
- Thu Jan 28, 2021 4:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Lecture Content for MT1
- Replies: 4
- Views: 233
Re: Lecture Content for MT1
I believe its Fridays lecture of Week 3!
- Sat Jan 23, 2021 9:46 pm
- Forum: Student Social/Study Group
- Topic: Midterm Study Tips
- Replies: 41
- Views: 1869
Re: Midterm Study Tips
From what I've heard UA sessions and Homework problems!
- Sat Jan 23, 2021 9:44 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: standard states
- Replies: 6
- Views: 359
Re: standard states
not sure if we are but in case, just know that the standard state refers to the element's form at 25ºC and 1atm
- Sat Jan 23, 2021 9:41 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Standard State
- Replies: 11
- Views: 470
Re: Standard State
Like previously mentioned, Standard State is 25ºC and 1atm
- Sat Jan 23, 2021 9:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Review session
- Replies: 3
- Views: 222
Midterm Review session
Didn't have Lavelle for Chem 14A, does he do a review session before the midterm? or is the homework problems from the outline basically it?
- Sat Jan 23, 2021 9:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Sapling vs. Textbook Problems
- Replies: 8
- Views: 471
Re: Sapling vs. Textbook Problems
Hi guys, so what im taking from this is basically ti study/ understand how to do textbook problems because they are similar to what the midterms will be like?
- Sun Jan 17, 2021 8:38 pm
- Forum: Phase Changes & Related Calculations
- Topic: Determining Stronger Acids
- Replies: 18
- Views: 759
Re: Determining Stronger Acids
Hi so if the acid is strong, the pKa will be a smaller value
- Sun Jan 17, 2021 8:32 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Textbook Question 5I.11
- Replies: 4
- Views: 242
Re: Textbook Question 5I.11
don't worry its the same thing, in dividing by 0.5 its the same thing as multiplying it by 2 at the end you should end up with the same result. if not try seeing another factor that might of caused it
- Sun Jan 17, 2021 6:59 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Pressure Rule
- Replies: 29
- Views: 1505
Re: Pressure Rule
I believe that liquids and solids don't count and we only do the moles of gases
- Sun Jan 17, 2021 6:57 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Temperature
- Replies: 45
- Views: 1479
Re: Temperature
I believe we would just need to state if the reaction is end or exothermic. The response depends on delta h
- Sun Jan 17, 2021 6:53 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Exothermic vs Endothermic
- Replies: 13
- Views: 617
Re: Exothermic vs Endothermic
something that helps me remember this is: Exo= outside so energy is released to the outside. Endo= within so energy is absorbed.
- Sun Jan 10, 2021 8:25 pm
- Forum: General Science Questions
- Topic: midterm/final
- Replies: 12
- Views: 724
Re: midterm/final
Arti_Patel_3H wrote:Naomi Hernandez-Ramirez 1J wrote:(Took Chem 14A w/ Scerri) Do any of you have the lockdown browser, Respondus, download link or know where I can find it?
https://download.respondus.com/lockdown ... =228644488 this is the link I used to download Respondus for Lavelle last quarter
THANK YOU!!
- Sun Jan 10, 2021 8:23 pm
- Forum: Ideal Gases
- Topic: Units for Pressure
- Replies: 41
- Views: 2610
Re: Units for Pressure
like most I agree that the standard unit for pressure = atm, I know you've been getting Atm and bar, but I think atm is the correct unit
- Sun Jan 10, 2021 8:15 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Conditions of Equilibrium
- Replies: 4
- Views: 196
Conditions of Equilibrium
How do we know the conditions of equilibrium? Would it only be temperature or other conditions as well?
- Sun Jan 10, 2021 8:12 pm
- Forum: General Science Questions
- Topic: midterm/final
- Replies: 12
- Views: 724
Re: midterm/final
(Took Chem 14A w/ Scerri) Do any of you have the lockdown browser, Respondus, download link or know where I can find it?
- Sun Jan 10, 2021 7:36 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentrations
- Replies: 9
- Views: 494
Concentrations
how do we know the concentrations of each (P and R)? I totally forgot and spaced when he was going over it in lec1
- Sun Jan 10, 2021 7:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: change in K
- Replies: 22
- Views: 933
Re: change in K
If equilibrium is temperature dependent would it it also be time dependent? (time from initial temp to equilibrium temp)