Search found 13 matches

by regina_ho_3A
Sat Mar 18, 2017 7:17 pm
Forum: *Cycloalkenes
Topic: 2013 FINAL Q6A
Replies: 4
Views: 710

Re: 2013 FINAL Q6A

Carbon 2 is circled, if you check the solutions in the book. Carbon 3 is not sp2 hybridized, since it is bonded to 2 other carbon atoms and 2 hydrogen atoms.
by regina_ho_3A
Sat Mar 11, 2017 3:53 pm
Forum: *Ethers
Topic: Homework Ch. 2 #30
Replies: 3
Views: 701

Re: Homework Ch. 2 #30

I would first draw out the molecule so I can see how the oxygen is attached to the carbons. After drawing it out, you should be able to clearly see that there is an ether functional group. We know that in order to name an ether, we have to identify the longest chain and the shortest chain. The short...
by regina_ho_3A
Sat Mar 04, 2017 2:06 pm
Forum: *Electrophiles
Topic: Nucleophile vs Electrophile
Replies: 1
Views: 519

Nucleophile vs Electrophile

Is HI a nucleophile or electrophile?
by regina_ho_3A
Sat Feb 25, 2017 2:36 pm
Forum: Administrative Questions and Class Announcements
Topic: O-Chem Black and white textbook
Replies: 3
Views: 346

Re: O-Chem Black and white textbook

Should we bring the OChem textbook with us to class?
by regina_ho_3A
Sun Feb 19, 2017 10:48 am
Forum: First Order Reactions
Topic: 2013 Quiz Preparation Question#5 for 1st Order Reactions [ENDORSED]
Replies: 3
Views: 496

Re: 2013 Quiz Preparation Question#5 for 1st Order Reactions [ENDORSED]

I used 2^n to get my answer 2 is a multiple of 64. So after I solve for n, n lets me know how many half-lives the process cycles through. In this case to get 1/64, we would have to raise (1/2) to a power of 6. This lets me know that the process has gone through 6 half lives so I would have to multip...
by regina_ho_3A
Sat Feb 18, 2017 8:36 pm
Forum: First Order Reactions
Topic: 2013 Quiz Preparation Question#5 for 1st Order Reactions [ENDORSED]
Replies: 3
Views: 496

Re: 2013 Quiz Preparation Question#5 for 1st Order Reactions [ENDORSED]

Since this reaction is in first order, the half-live is equal to ln2/k. However we already know the half life, which is 0.43s. To find 1/64 of the concentration, we can set this equal to 1/2^n because 2 is a factor of 64. Then you solve for n, 1/2^n=1/64 and multiply the value you get by the given h...
by regina_ho_3A
Mon Feb 13, 2017 4:50 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011712

Re: Post All Chemistry Jokes Here

A galvanic cell says to another galvanic call: "We're meant to be because our relationship is electric."
by regina_ho_3A
Sun Feb 12, 2017 1:26 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: E State Function?
Replies: 1
Views: 227

E State Function?

Why is E not a state function?
by regina_ho_3A
Sun Feb 05, 2017 8:05 pm
Forum: Balancing Redox Reactions
Topic: Pneumonic Device
Replies: 3
Views: 443

Re: Pneumonic Device

Also
Red Cat- Reduction at the Cathode
An Ox- Oxidation at the anode
by regina_ho_3A
Sat Feb 04, 2017 1:13 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Electrochemistry and half-reactions
Replies: 1
Views: 239

Electrochemistry and half-reactions

I'm confused on how to make a cell reaction for Pt(s)|O2(g)|H+(aq)||OH-(aq)|O2(g)|Pt(s) on problem 14.11d in the textbook. In the solution manual, it says that the equation for the anode is O2 + 4H+ + 4e- --> 2H2O. Why is the H+ in this equation written as the reactant instead of the product?
by regina_ho_3A
Sun Jan 22, 2017 2:29 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Calculating Change in Entropy
Replies: 1
Views: 210

Calculating Change in Entropy

When we calculate change in entropy, how do we know when to use the enthalpy of formation vs the enthalpy of vaporization/fusion?
For example, on question 9.15 why do we use the enthalpy of formation to calculate the freezing of H2O instead of using the enthalpy of fusion?
by regina_ho_3A
Sat Jan 14, 2017 7:14 pm
Forum: Administrative Questions and Class Announcements
Topic: CH 8 Which HW Problems to do first?
Replies: 14
Views: 9303

Re: CH 8 Which HW Problems to do first?

Will there be a list of recommended readings for each chapter? Like a certain chapter or section of the textbook to read before each lecture? I kind of go off the course reader. Depending on where we left off on the previous lecture, I just look at the topics on the next few pages in the course rea...

Go to advanced search