Search found 44 matches
- Fri Mar 12, 2021 6:12 pm
- Forum: Administrative Questions and Class Announcements
- Topic: week 10 lectures?
- Replies: 15
- Views: 1294
Re: week 10 lectures?
Content finishes on wednesday and there is a review on friday.
- Fri Mar 12, 2021 6:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final
- Replies: 48
- Views: 4215
Re: Final
Thank you for these great tips!
- Fri Mar 12, 2021 6:11 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Distribution
- Replies: 5
- Views: 591
Re: Final Distribution
I think each section is equally represented on the final, with maybe more focus on the recent topics?
- Fri Mar 12, 2021 6:10 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final on 3/13
- Replies: 18
- Views: 1289
Re: Final on 3/13
It is on the 14th at 9:30am!
- Fri Mar 12, 2021 6:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Resources for Final?
- Replies: 5
- Views: 418
Re: Resources for Final?
khan academy is really good! there are also a lot of resources and practice problems in the class folder :)
- Fri Mar 12, 2021 6:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Posts
- Replies: 7
- Views: 1172
Re: Posts
Yeah, I think they are open until the final.
- Fri Mar 12, 2021 6:08 pm
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 636808
Re: Final Jitters
almost_ethan wrote:I'm getting very nervous as the Final approaches, and I'm currently wondering why he chose to do the Final on a SUNDAY--very sad.
yea, and on daylight savings too omg
- Fri Mar 12, 2021 6:07 pm
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 636808
Re: Final Jitters
Does anyone know how to calm down your anxieties before you take this final? Since having test anxiety can be very distracting while you're trying to study or even while you're taking the test itself. Open to any tips:) Does anyone just zone out during the exam or get stuck in a brain fog and just ...
- Fri Mar 12, 2021 6:06 pm
- Forum: Student Social/Study Group
- Topic: Culinary Chemistry
- Replies: 239
- Views: 58504
Re: Culinary Chemistry
Aditya Sundaram 3D wrote:almost_ethan wrote:For some reason, I always find myself stress-baking during finals week--just to get my mind off things.
I can relate to this one. I'm stress-making boba and drinking way too much tea. It's scary and yet so tasty. My weighing scale going up up up.
ahah boba is getting me through this class :(
- Sun Feb 28, 2021 11:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student - Part II [ENDORSED]
- Replies: 298
- Views: 470225
Re: Advice from a Medical Student - Part II [ENDORSED]
Thank you so much for sharing! This was very inspiring and helpful :)
- Sun Feb 28, 2021 11:22 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing Reactions
- Replies: 22
- Views: 1520
Re: Balancing Reactions
The order doesn't matter as long all the coefficients are right and the reactants are on the reactant side, and products on the product side.
- Sun Feb 28, 2021 11:14 pm
- Forum: Student Social/Study Group
- Topic: Culinary Chemistry
- Replies: 239
- Views: 58504
Re: Culinary Chemistry
Eric Ngo 1F wrote:My favorite cool chemistry thing with cooking is cooking shrimp with lemon juice in stuff like ceviche!
that sounds so yummy eric!
- Sun Feb 28, 2021 11:13 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation Numbers
- Replies: 30
- Views: 1781
Re: Oxidation Numbers
You don't have to memorize them. Knowing some basic ones like for O2 would be helpful though!
- Sun Feb 28, 2021 11:12 pm
- Forum: Balancing Redox Reactions
- Topic: Canceling Out Added Electrons in Half Reactions
- Replies: 10
- Views: 1680
Re: Canceling Out Added Electrons in Half Reactions
The number of electrons that are cancelled out must be the same for both half reactions. You have to multiply both equations to get the same number of electrons.
- Sun Feb 21, 2021 11:33 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: fun way to remember anode and cathode
- Replies: 16
- Views: 3091
Re: fun way to remember anode and cathode
This is such a fun and helpful way to remember!
- Sun Feb 21, 2021 11:32 pm
- Forum: Balancing Redox Reactions
- Topic: Reducing vs oxidizing agents
- Replies: 16
- Views: 1072
Re: Reducing vs oxidizing agents
Oxidizing agents are reduced and gain electrons, while reducing agents are oxidized and lose electrons.
- Sun Feb 21, 2021 11:31 pm
- Forum: Balancing Redox Reactions
- Topic: Cell/battery
- Replies: 26
- Views: 1331
Re: Cell/battery
Cell and battery are the same!
- Sun Feb 21, 2021 11:30 pm
- Forum: Balancing Redox Reactions
- Topic: salt bridge
- Replies: 19
- Views: 926
Re: salt bridge
The salt bridge keeps both solutions neutrally charged and maintain a concentration.
- Sun Feb 21, 2021 11:29 pm
- Forum: Balancing Redox Reactions
- Topic: "Leo" Oxidation Numbers
- Replies: 26
- Views: 1446
Re: "Leo" Oxidation Numbers
During oxidation, electrons are lost, so LEO is an acronym that says "losing electrons is oxidation".
- Sun Feb 14, 2021 11:59 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student - Part II [ENDORSED]
- Replies: 298
- Views: 470225
Re: Advice from a Medical Student - Part II [ENDORSED]
Thank you so much for sharing your experience!
- Sun Feb 14, 2021 11:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 14B Enrollment [ENDORSED]
- Replies: 67
- Views: 22644
Re: 14B Enrollment [ENDORSED]
I think 14C should be first passed because most 14B students will take it.
- Sun Feb 14, 2021 11:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 204971
Re: How to find my posts
It's at the quick links, and "your posts"
- Sun Feb 14, 2021 11:57 pm
- Forum: Student Social/Study Group
- Topic: Culinary Chemistry
- Replies: 239
- Views: 58504
Re: Culinary Chemistry
wow this is so cool! I did not know this before
- Sun Feb 07, 2021 7:32 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Positive and Negative q Value
- Replies: 19
- Views: 14174
Re: Positive and Negative q Value
q is negative if it is exothermic or releasing heat. q is positive when it is endothermic and takes in heat.
- Sun Feb 07, 2021 7:31 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: closed system
- Replies: 43
- Views: 2033
Re: closed system
A closed system does not allow exchange with its surroundings.
- Sun Feb 07, 2021 7:30 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: deltaU
- Replies: 29
- Views: 1284
Re: deltaU
Delta U is the change of internal energy in a system.
- Sun Feb 07, 2021 7:29 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Sapling Week 3/4 #19
- Replies: 6
- Views: 310
Re: Sapling Week 3/4 #19
Hi, I found the calorimeter constant first, c, by using the equation c=q/deltaT. I plugged in x kJ and temp change, and solved for q by multiplying it by the temp change for the next reaction. DeltaU=q, which was found in your equation.
- Sun Jan 31, 2021 7:13 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4543640
Re: Post All Chemistry Jokes Here
Do you like Sodium Hypobromite?
NaBrO
NaBrO
- Sun Jan 31, 2021 7:11 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy Reactions
- Replies: 13
- Views: 562
Re: Enthalpy Reactions
We have to include phase changes in these problems.
- Sun Jan 31, 2021 7:10 pm
- Forum: Phase Changes & Related Calculations
- Topic: Examples of sublimation
- Replies: 12
- Views: 700
Re: Examples of sublimation
I heard dry ice is a good example of sublimation. Additionally, frozen foods sublime as you find frozen crystals inside the box.
- Sun Jan 31, 2021 7:08 pm
- Forum: Phase Changes & Related Calculations
- Topic: H and q
- Replies: 47
- Views: 2725
Re: H and q
q is heat in joules, while H is enthalpy change.
- Sun Jan 31, 2021 7:07 pm
- Forum: Phase Changes & Related Calculations
- Topic: when to assume x is insignificant
- Replies: 86
- Views: 14570
Re: when to assume x is insignificant
You can assume x is insignificant if it is below 1.0E-4.
- Sat Jan 23, 2021 4:20 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: X Approximations
- Replies: 23
- Views: 1214
Re: X Approximations
When Kb or Ka is less than 10^-4, we can approximate x to be 0.
- Sat Jan 23, 2021 4:07 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Weak Acids
- Replies: 8
- Views: 496
Re: Weak Acids
For a weak base that isn't specified, B would yield OH- and HB.
- Sat Jan 23, 2021 4:04 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam causing severe burns
- Replies: 19
- Views: 1091
Re: Steam causing severe burns
The air would cool down the steam, lowering its temperature.
- Sat Jan 23, 2021 3:59 pm
- Forum: Phase Changes & Related Calculations
- Topic: Determining Stronger Acids
- Replies: 18
- Views: 1082
Re: Determining Stronger Acids
A smaller pKa leads to a smaller pH, making the acid stronger.
- Sat Jan 23, 2021 3:51 pm
- Forum: Student Social/Study Group
- Topic: Midterm
- Replies: 21
- Views: 1489
Re: Midterm
The midterm is 50 minutes long, so there are a different number of questions for everyone depending on difficulty. I don't think the professor mentioned how many questions there will be though.
- Sun Jan 17, 2021 9:02 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 4256
Re: q vs k
K is the equilibrium constant, while Q is the equilibrium at any given point.
- Sun Jan 17, 2021 9:00 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Weak versus Strong Acid and Base
- Replies: 10
- Views: 674
Re: Weak versus Strong Acid and Base
There is a chart for strong vs weak acids and bases in the textbook! I think we need to memorize them for this class though.
- Sun Jan 17, 2021 8:59 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Using Ka vs Kb
- Replies: 8
- Views: 615
Re: Using Ka vs Kb
Ka is used for the formation of acids (H30+ in product), while Kb is used for the formation of bases (OH-)
- Sun Jan 10, 2021 11:13 am
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 174222
Re: Reading the textbook
Personally, I first do the assigned textbook problems for practice and if I am confused or stuck on a topic, I go back and read the section.
- Sun Jan 10, 2021 11:10 am
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 204971
Re: How to find my posts
I went to "Your posts", but there are only the groups by topic although I posted more than once in a group. Is there a way to see all my individual posts?
- Sun Jan 10, 2021 11:05 am
- Forum: Administrative Questions and Class Announcements
- Topic: Accessing the E-textbook [ENDORSED]
- Replies: 125
- Views: 42848
Re: Accessing the E-textbook [ENDORSED]
Nicole Critzer 2L wrote:Everything on Sapling is automatically graded right? We don't have to turn anything in for this portion of the course?
Yes and the 5 community posts, but I believe that should be all that's turned in for this course besides midterms and final.
- Sun Jan 10, 2021 11:03 am
- Forum: Administrative Questions and Class Announcements
- Topic: Accessing the E-textbook [ENDORSED]
- Replies: 125
- Views: 42848
Re: Accessing the E-textbook [ENDORSED]
Hi! Does anyone know when Dr. Lavelle says the Sapling assignments are due midnight Sunday of the week is he referring to Sunday as the first day of the week? Like is the Week 1 Assignment due on 11:59pm on Jan 10th or 17th? Thanks in advance :) I believe they are due Jan 17th, so the end of week 2!