Search found 53 matches
- Fri Mar 15, 2019 2:26 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3013971
Re: Post All Chemistry Jokes Here
I try to tell Chemistry jokes, but there's no reaction.
- Fri Mar 15, 2019 2:24 am
- Forum: Student Social/Study Group
- Topic: Studying for the Final
- Replies: 25
- Views: 2719
Re: Studying for the Final
Has Lyndon posted his practice exam for the final exam?
- Fri Mar 15, 2019 2:23 am
- Forum: Van't Hoff Equation
- Topic: Overview
- Replies: 8
- Views: 1070
Re: Overview
For the final exam, will the test specify between whether we need to use bond enthalpies or standard enthalpy reaction?
- Sun Mar 10, 2019 12:49 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: van't hoff equation
- Replies: 6
- Views: 711
Re: van't hoff equation
For the final exam, will we need to know how to derive the Van't Hoff equation?
- Sun Mar 10, 2019 12:46 am
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 24
- Views: 2127
Re: Final
Has Lyndon posted his final review sheet? I know he usually makes a practice exam, but I haven't seen anything about it yet.
- Sun Mar 10, 2019 12:45 am
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 24
- Views: 2127
Re: Final
I have the same question. I know that a lot of people just do the homework problems for practice, but are their any other methods for preparing for the exam?
- Tue Feb 26, 2019 4:21 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 5
- Views: 570
Re: salt bridge
Salt bridges and porous disks both allow for a flow of ions from anode to cathode.
- Tue Feb 26, 2019 4:19 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell diagram
- Replies: 4
- Views: 397
Re: Cell diagram
For the cell diagram, I don't think that when using an inert solids you have to put it on both sides. I think that as long as its include on the right side of the cathode then it implies that it is included everywhere. But that's only for inert solids.
- Tue Feb 26, 2019 4:17 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell diagram
- Replies: 4
- Views: 397
Re: Cell diagram
Is Pt(s) the only inert gas that we can use?
- Fri Feb 22, 2019 10:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: electromotive force vs cell potential vs voltage
- Replies: 1
- Views: 235
Re: electromotive force vs cell potential vs voltage
I had the same question, because I know how to find cell potential using the potential (E)=E(cathode)-E(anode).However, I'm not sure about the others?
- Fri Feb 22, 2019 9:43 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Solids in cell diagrams
- Replies: 4
- Views: 695
Re: Solids in cell diagrams
Pretty much what everyone else said, But I think its primarily the aqueous state that goes in the middle (if there is one).
- Fri Feb 22, 2019 9:37 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Inert Electrodes
- Replies: 2
- Views: 303
Re: Inert Electrodes
I believe that you can use both Pt(s) and C(gr).
- Sat Feb 09, 2019 11:07 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: K constant
- Replies: 5
- Views: 922
Re: K constant
Is there a way to convert from atm to barr, when dealing with partial pressure?
- Sat Feb 09, 2019 11:03 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 3/2R and 5/2R
- Replies: 5
- Views: 631
Re: 3/2R and 5/2R
So how do we know when to use either 3/2R or 5/2R?
- Sat Feb 09, 2019 11:00 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: methods
- Replies: 8
- Views: 919
Re: methods
How do you know which bonds need to be broken?
- Sat Feb 02, 2019 7:54 pm
- Forum: Phase Changes & Related Calculations
- Topic: U and its relations to work
- Replies: 8
- Views: 784
Re: U and its relations to work
Additionally, when do you know whether to use q or delta H?
- Sat Feb 02, 2019 7:22 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: bond enthalpy equations
- Replies: 6
- Views: 611
Re: bond enthalpy equations
When solving for the enthalpy of a reaction, how do you know which bonds are supposed to be broken?
- Sat Feb 02, 2019 7:17 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond enthalpies
- Replies: 3
- Views: 417
Re: Bond enthalpies
Are we expected to automatically know all the lewis structures/resonance structures in order to solve bond enthalpy problems?
- Sat Jan 26, 2019 11:29 pm
- Forum: Ideal Gases
- Topic: atm vs. bar?
- Replies: 25
- Views: 2823
Re: atm vs. bar?
There is a difference in the conversion formula that is used for both. I think its a difference in the R constant that is used for the formula PV=nRT.
- Sat Jan 26, 2019 11:27 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3376
Re: kc vs kp
If they just say "k" do we assume Kp? Because in one problem in the textbook they used K and then it was Kc. I think you can assume Kp when both reactants and products are all in the gas phase, or if told to find the equilibrium constant in atm. But I think that it might be safe to simply...
- Sat Jan 26, 2019 11:22 pm
- Forum: Ideal Gases
- Topic: ICE table
- Replies: 11
- Views: 1270
Re: ICE table
ICE tables can be used for both, but I think there are specific cases in which if you are supposed to be solving for partial pressure, or given the units atm, then you might have to use the formula PV=nRT to convert to pressure.
- Thu Jan 17, 2019 4:04 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Relationship between pH, protanation and molarity
- Replies: 5
- Views: 829
Re: Relationship between pH, protanation and molarity
Can deprotonation still be found if we are given initial concentrations for both the reactants and products?
- Thu Jan 17, 2019 4:02 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Relationship between pH, protanation and molarity
- Replies: 5
- Views: 829
Re: Relationship between pH, protanation and molarity
When solving for the percent deprotonation, is it always going to be the value you got for X (from the ICE table) divided by the initial concentration given?
- Thu Jan 17, 2019 3:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Tables [ENDORSED]
- Replies: 11
- Views: 2362
Re: ICE Tables [ENDORSED]
When using ICE tables, how do you know when its better to use the quadratic formula to find X or the 5% rule?
- Sat Jan 12, 2019 4:43 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE Table
- Replies: 6
- Views: 597
Re: ICE Table
Basically, yes; whenever you set up the ICE table, you start by assuming that the reaction hasn't taken place yet. Therefore, there won't be any products formed yet, so their initial concentrations are 0. So if we assume that the reaction hasn't happened yet, is that why for anything that has an in...
- Sat Jan 12, 2019 4:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: How to use ICE tables
- Replies: 5
- Views: 698
Re: How to use ICE tables
I'm still confused on how to find the change in molarity, can someone explain please? Does the number in front of the X come from the coefficient that is in front of the reactant or product?
- Sat Jan 12, 2019 4:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Week 7 Discussion Notes (3A, 3I, 3K)
- Replies: 4
- Views: 1062
Re: Week 7 Discussion Notes (3A, 3I, 3K)
Thank you Joyce!!!
- Sun Dec 09, 2018 1:47 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Boiling Point
- Replies: 6
- Views: 2584
Re: Boiling Point
Can't you also determine which compound has a higher/ lower boiling point by looking at branching?
- Sun Dec 09, 2018 12:32 am
- Forum: Naming
- Topic: Chloro vs Chlorito
- Replies: 10
- Views: 1200
Re: Chloro vs Chlorito
I don't think there is a difference. Some of the names in the book are slightly different because the IUPAC Name Convention recently changed some of the names. However if you check the coordination compound list on Lavelle's website, it will show you which ones are the same.
- Sat Dec 08, 2018 11:57 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 20872
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Thank you so much!!!
- Sun Dec 02, 2018 11:39 am
- Forum: Hybridization
- Topic: lone pairs
- Replies: 20
- Views: 1998
Re: lone pairs
Is the answer automatically wrong if lone pairs are not separated from the shared pairs of electrons? for instance, if something has 3 shared pairs of electrons and 2 lone pairs, can it only be written as AX3E2 or can you write it as AX5?
- Sun Dec 02, 2018 11:35 am
- Forum: Hybridization
- Topic: Pi bonds in triple bond
- Replies: 17
- Views: 1769
Re: Pi bonds in triple bond
How would one combine s and p orbitals to create a sigma bond or a pi bond?
- Sun Dec 02, 2018 11:33 am
- Forum: Hybridization
- Topic: 2SP^3 vs. SP^3
- Replies: 6
- Views: 752
Re: 2SP^3 vs. SP^3
So we are always supposed to include the coefficient in our hybridization answer?
- Tue Nov 13, 2018 7:25 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Formula
- Replies: 3
- Views: 250
Re: VSEPR Formula
And how would you calculate the bond lengths for 2E 13?
- Tue Nov 13, 2018 7:19 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Homework for VSEPR
- Replies: 3
- Views: 354
Re: Homework for VSEPR
In terms of the 7th edition, would the questions for 2E help the most? For practicing how to draw VSEPR?
- Tue Nov 13, 2018 6:56 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Homework Due Week 7
- Replies: 10
- Views: 1174
Re: Homework Due Week 7
What chapter are we doing this week for the 7th edition?
- Sun Nov 11, 2018 11:00 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3013971
Re: Post All Chemistry Jokes Here
That was sodium funny.
I slapped my neon that one!!!
I slapped my neon that one!!!
- Sun Nov 11, 2018 10:53 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Thanksgiving Wednesday
- Replies: 9
- Views: 850
Re: Thanksgiving Wednesday
705088777 wrote:If we have a chem discussion that day will it be canceled too?
And if our discussion is canceled would we just turn in the homework when we come back or on whatever day we have our fist class that week?
- Sun Nov 04, 2018 6:59 pm
- Forum: Ionic & Covalent Bonds
- Topic: Midterm questions
- Replies: 5
- Views: 426
Re: Midterm questions
Will VSEPR be on the midterm?
- Sun Nov 04, 2018 6:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Material provided in all Chem 14A/14B quizzes and exams
- Replies: 12
- Views: 22605
Re: Material provided in all Chem 14A/14B quizzes and exams
Are we only allowed to use pen on the midterm like we did on test 1 and 2?
- Sun Nov 04, 2018 6:52 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
- Replies: 121
- Views: 17232
Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Thank you so much Lyndon!!!
- Sun Oct 28, 2018 6:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 240725
Re: Tutoring? [ENDORSED]
There are also a lot of office hours (step-up, drop-in, and workshops) that are up on the hill, which are a very convenient for students living on campus.
- Sun Oct 28, 2018 6:21 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 147126
Re: Reading the textbook
Does anyone know what the sapling access code is for? Like, is having it actually helpful?
- Sun Oct 28, 2018 6:14 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 161171
Re: How to find my posts
I think you have to use sub topic to create a new topic.
- Sun Oct 21, 2018 7:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 8
- Views: 1812
Re: Test 2
I have the same question. And I was also wondering if test 2 would be as long as test 1 was?
- Sun Oct 21, 2018 7:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 383151
Re: Advice from a Medical Student [ENDORSED]
Thank you for the advice!
- Sun Oct 21, 2018 7:26 pm
- Forum: Student Social/Study Group
- Topic: Test #2
- Replies: 6
- Views: 455
Re: Test #2
Just for clarification: everything that was covered during Friday's lecture will be included in the test?
- Thu Oct 11, 2018 5:48 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Homework and discussion grading?
- Replies: 2
- Views: 209
Re: Homework and discussion grading?
Score for homework 1 should be given out when the homework is passed back on the day that your discussion takes test one. However, I'm not sure when our grades are updated online.
- Thu Oct 11, 2018 5:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Grading question
- Replies: 11
- Views: 1734
Re: Grading question
Does anyone know when we will be getting our scores back from test one?
- Thu Oct 11, 2018 5:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 'extra credit' in Sapling Learning
- Replies: 7
- Views: 1297
Re: 'extra credit' in Sapling Learning
Is signing up for Sapling required for the class?
- Wed Oct 03, 2018 11:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 'extra credit' in Sapling Learning
- Replies: 7
- Views: 1297
Re: 'extra credit' in Sapling Learning
So are the quizzes extra credit or not? I plan on doing them anyway, but I would just like to know.
- Wed Oct 03, 2018 11:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 240725
Re: Tutoring? [ENDORSED]
If I can't make it to office hours with Professor Lavelle (because of conflicts in my schedule), is there any way I can set up appointments?
- Tue Oct 02, 2018 11:22 pm
- Forum: Student Social/Study Group
- Topic: Any necessary data booklets?
- Replies: 2
- Views: 320
Re: Any necessary data booklets?
Do I need to buy the 7th edition if I already have the 6th?