Search found 20 matches
- Sun Mar 19, 2017 12:32 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Winter 2016 Q3C (p.207)
- Replies: 3
- Views: 949
Winter 2016 Q3C (p.207)
This question asks for us to write out the cell diagram for the redox reaction, but why does the answer include AGBr(s) instead of Ag+(aq)? Isn't it supposed to be the dissociated ion and not the entire solid product? Thank you!
- Sun Mar 12, 2017 11:31 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Chapter 15 Question 81
- Replies: 1
- Views: 1569
Re: Chapter 15 Question 81
Ok, knowing that the given information is K=326 and k(attach)=7.4x10^7 L/mol*s, you can use the equation: K = k(forward)/k(reverse) or K = k(attach)/k(loss). The rate constant of the loss of unreacted substrate will be equal to k(loss) = k(attach/K = (7.4x10^7 L/mol*s)/326 = 2.3x10^5 L/mol*s. Hope t...
- Mon Mar 06, 2017 12:12 am
- Forum: Administrative Questions and Class Announcements
- Topic: switch 14C and BL
- Replies: 2
- Views: 648
Re: switch 14C and BL
Hi! I'm totally interested in switching with you! Email me at huonglydo@gmail.com and we can settle all the details if you're still interested!
- Sun Feb 26, 2017 10:11 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3642327
Re: Post All Chemistry Jokes Here
Organic chemistry is so difficult.........
People who study it have alkanes of trouble!
People who study it have alkanes of trouble!
- Sun Feb 19, 2017 11:23 pm
- Forum: Zero Order Reactions
- Topic: Homework Help 15.13
- Replies: 2
- Views: 1491
Re: Homework Help 15.13
a) Since, the units for the initial reaction rate is mol*L-1*s-1, we have to take the given values for H2 and I2 and convert them. Plugged into the reaction rate formula of rate= k*[H2]*[I2], you will get rate = (0.063 \frac{L}{mol*s})(\frac{0.52g H2}{0.750 L})(\frac{1 mol H2}{2....
- Sun Feb 12, 2017 8:06 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: 9.59
- Replies: 1
- Views: 452
9.59
For part a of this problem, I used the enthalpy formula, , and the same formula to calculate the entropy, but my free energy final calculation is still off. Is there a step that I am missing in the problem?
- Sun Feb 05, 2017 10:38 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3642327
Re: Post All Chemistry Jokes Here
What do you call a tooth in a glass of water?
A one molar solution.
A one molar solution.
- Sun Jan 29, 2017 6:40 pm
- Forum: Student Social/Study Group
- Topic: Formulas
- Replies: 4
- Views: 994
Re: Formulas
Most, if not all, of the equations we need for thermochemistry can be found on the back of the laminated sheet that came with the purchase of the course readers!
- Sun Jan 22, 2017 5:59 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Significant Figure [ENDORSED]
- Replies: 7
- Views: 1392
Re: Significant Figure [ENDORSED]
If I remember correctly, if you took Chem 14A with Lavelle, or know someone who has the old course reader on them, there should be one/two pages in the front of the course reader that specifically highlights what he expects from us for sig.figs. Additionally, I think the maximum points that can get ...
- Sun Jan 15, 2017 2:39 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Question 8.25
- Replies: 1
- Views: 446
Re: Question 8.25
Because the variable that you are plugging in the 7.32 C is for the CHANGE in temperature, it doesn't matter if you convert from degrees Celsius to degrees Kelvin, the reaction is still raised by 7.32 degrees, regardless of the type of the scale of temperature behind it. The solutions manual just ch...
- Sun Dec 04, 2016 1:23 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 2015 final Q7A
- Replies: 1
- Views: 580
Re: 2015 final Q7A
Since you know that Ka is [HCO3-][H3O+]/[H2CO3], plug in your known values of Ka and [H3O+], and get all the numerical values on one side. What you have left on the other side is [HCO3-]/[H2CO3], the ratio of bicarbonate to carbonic acid. Solve and you have the answer!
- Mon Nov 28, 2016 1:57 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: When Should I use the ICE table?
- Replies: 5
- Views: 26944
Re: When Should I use the ICE table?
I assume so because the ICE box is a concept that is heavily incorporated into the course reader and the practice problems we see in the workbook quizzes.
- Sun Nov 20, 2016 3:20 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Textbook 11.7 (a)
- Replies: 1
- Views: 402
Re: Textbook 11.7 (a)
The problem asks us to see when the rate of decomposition of the X2 molecules has reached equilibrium. In Flask 1 and 2, the X2 molecules continue to dissociate into X molecules. In Flask 3, about half of the X2 molecules have dissociated. Since the number of X2 molecules and X molecules don't chang...
- Sun Nov 13, 2016 2:44 pm
- Forum: Photoelectric Effect
- Topic: Midterm question #3A
- Replies: 2
- Views: 654
Re: Midterm question #3A
Because Joules is the standard unit for the photoelectric experiment, you need to convert the work function (threshold energy) from kJ/mol to just J. Since Avogadro's constant's units are 1/mol, dividing kJ/mol by 1/mol will cancel out the mol unit, leaving you with just kJ to convert to J to get th...
- Sun Nov 06, 2016 9:46 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3642327
Re: Post All Chemistry Jokes Here
What do you call a bear with a dipole moment?
A polar bear!
A polar bear!
- Sat Oct 29, 2016 3:15 pm
- Forum: Hybridization
- Topic: s and p hybridization
- Replies: 2
- Views: 610
Re: s and p hybridization
I think that we don't say s^2 because it only has one orbital available to hybridize, while p has three orbitals (px, py, and pz) available to hybridize.
- Sun Oct 23, 2016 6:14 pm
- Forum: Lewis Structures
- Topic: Quiz 2
- Replies: 1
- Views: 453
Re: Quiz 2
I think that because the geometry of molecules is not going to be on the test, you just have to use your formal charge calculations for each atom to find the most stable combination of bonds. The correct Lewis structure should be the one that has the most stability in its bonds.
- Sun Oct 16, 2016 7:46 pm
- Forum: Student Social/Study Group
- Topic: De Neve Study Group
- Replies: 35
- Views: 4823
Re: De Neve Study Group
leezashashkova wrote:Does anyone know if we'll get our first quizzes back before the next quiz?
I think we get them back during our next discussion session, along with our graded workbooks as well :)
- Sun Oct 09, 2016 2:19 am
- Forum: Administrative Questions and Class Announcements
- Topic: Chemistry Community Points
- Replies: 11
- Views: 1975
Re: Chemistry Community Points
I'm pretty sure the deadline is midnight from Sunday night to Monday morning because the "week" technically starts with the class on Monday.
- Sun Oct 02, 2016 2:02 pm
- Forum: Student Social/Study Group
- Topic: Dykstra Hall Study Group (Fall 2016)
- Replies: 25
- Views: 3628
Re: Dykstra Hall Study Group (Fall 2016)
Hi everyone! I know I'm super late, but I'm living on Dykstra 4 and would love to join the study group (I need all the help I can get, to be honest haha). My email is huonglydo@gmail.com Thanks!