Search found 17 matches
- Sun Mar 19, 2017 10:23 am
- Forum: *Cycloalkanes
- Topic: Final 2013 Q6 - Numbering
- Replies: 3
- Views: 1568
Re: Final 2013 Q6 - Numbering
Hi everyone! Can anyone explain why the methyls of the cyclohexane in Question 6A of the 2013 Final are numbered 1,5,5,6 and not 1,2,3,3? It's because you have a double bond. When you have a double or a triple bond, you must count going across across the bond. You started at the double bond, but th...
- Thu Mar 16, 2017 7:33 pm
- Forum: *Carboxylic Acids
- Topic: saturated, unsaturated fats, etc.
- Replies: 1
- Views: 1427
saturated, unsaturated fats, etc.
Will we have to know about saturated, unsaturated, polyunsaturated fats, etc. for the final since it is in the section to read in the syllabus however we never went over it in class
- Thu Mar 16, 2017 3:59 pm
- Forum: *Haloalkanes
- Topic: priority of double/triple with a halogenated compound
- Replies: 1
- Views: 1270
priority of double/triple with a halogenated compound
When there is a double or triple bond as well as a halogen, does the double/triple bond take priority when naming because the halogen is treated like a substituent? Is the double/triple bond actually prioritized or am I mistaken? I know a functional group takes priority over double/triple bonds howe...
- Sat Mar 11, 2017 4:04 pm
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: gauche and anti
- Replies: 1
- Views: 552
gauche and anti
Are there anymore low energy conformations for molecules other than the gauche and anti states?
- Sun Mar 05, 2017 3:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29735
Re: Quiz 3 Winter 2017
Could someone explain number 5? It is an electrophilic addition reaction because you are adding the HBr to the cholesterol. HBr when broken up has H+ as an electrophile and Br- as a nucleophile. There are two steps because first you add the H+ to the cholesterol then in the second step you add the ...
- Sun Mar 05, 2017 12:21 pm
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: exergonic vs exothermic
- Replies: 2
- Views: 1330
exergonic vs exothermic
What is the difference between a reaction being exergonic and a reaction being exothermic? Does a reaction being exothermic mean that it is exergonic and vice versa?
- Tue Feb 28, 2017 4:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: quiz 2
- Replies: 1
- Views: 483
quiz 2
What was the class average for quiz 2?
- Sun Feb 26, 2017 11:58 pm
- Forum: *Nucleophiles
- Topic: strength of nucleophiles vs basicity
- Replies: 2
- Views: 546
Re: strength of nucleophiles vs basicity
To my understanding there is no direct general trend for them. Its just the fact that negatively charged species tend to be basic. It's important to remember that the strength of a nucleophile is relative to the reaction it is taking place in.
- Sat Feb 25, 2017 5:49 pm
- Forum: *Electrophiles
- Topic: electrophiles turns into nucleophile [ENDORSED]
- Replies: 1
- Views: 478
electrophiles turns into nucleophile [ENDORSED]
Will there ever be a situation where one molecule or atom that was an electrophile could act as a nucleophile or vice versa?
- Sat Feb 11, 2017 9:59 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.31 [ENDORSED]
- Replies: 3
- Views: 858
Re: 14.31 [ENDORSED]
Yes Enot should be positive in order for it to be a spontaneous reaction.
- Sat Feb 11, 2017 2:14 pm
- Forum: Balancing Redox Reactions
- Topic: highest possible charge [ENDORSED]
- Replies: 3
- Views: 700
Re: highest possible charge [ENDORSED]
A higher voltage means it is more likely to be reduced which means that yes, it is a better oxidizing agent.
- Sat Feb 11, 2017 2:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: calculating n [ENDORSED]
- Replies: 1
- Views: 341
calculating n [ENDORSED]
Is there a quicker way of determining n (the number of electrons) than writing out and balancing the half reactions?
- Sat Feb 11, 2017 2:09 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: reversible reaction [ENDORSED]
- Replies: 1
- Views: 363
reversible reaction [ENDORSED]
How do you write the half reactions and devise a galvanic cell for a reversible reaction? For example when given: AgBr(s) double arrows Ag(+)(aq) + Br(-)(aq) Is it the same as usual?
- Sat Jan 28, 2017 6:13 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase Changes
- Replies: 2
- Views: 574
Re: Phase Changes
It's because the heat being added is used to to break bonds and other things like that so the temperature isn't going up until all bonds are broken.
- Thu Jan 19, 2017 2:21 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: which bonds to break/form [ENDORSED]
- Replies: 2
- Views: 509
which bonds to break/form [ENDORSED]
When using bond enthalpies to calculate the standard enthalpy of reaction, can you calculate breaking and forming all bonds in the equation? I know this would take an excessively long time but would you get the same result doing this as you would breaking and forming the minimum number of bonds requ...
- Thu Jan 12, 2017 2:03 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: standard reaction enthalpy
- Replies: 2
- Views: 481
standard reaction enthalpy
Since the course reader says that most reactions are given in their standard state, are there specific reactions that are not given in their standard state? Or is it rare enough that it is not an issue?
- Thu Jan 12, 2017 1:38 pm
- Forum: General Science Questions
- Topic: Intro to Organic Chemistry
- Replies: 9
- Views: 1942
Re: Intro to Organic Chemistry
I've also heard it's supplemental but that we won't be using it until the last portion of the quarter since 14C is organic chemistry