Search found 22 matches
- Wed Mar 15, 2017 8:42 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 576593
Re: Saying Thank You to Dr. Lavelle
Dear Dr. Lavelle Thank you for your dedication and enthusiasm that came along from you teaching this class. Coming into 14A last quarter I had no chemistry knowledge what so ever, but now finishing 14B I can say that I have truly learned more than I can imagine. I am going to miss this class as well...
- Sun Mar 12, 2017 4:59 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Naming Organic Molecules
- Replies: 20
- Views: 4203
Re: Naming Organic Molecules
I also agree that Kahn Academy is very helpful. I also made flashcards on quizlet to help me memorize the different names.
- Sun Mar 05, 2017 2:17 pm
- Forum: *Cycloalkanes
- Topic: Cycloalkanes
- Replies: 3
- Views: 753
Re: Cycloalkanes
They are the most common because they are highly stable and show up in DNA, RNA, and Sugars!
- Sat Feb 25, 2017 10:59 pm
- Forum: *Electrophiles
- Topic: BF3
- Replies: 2
- Views: 743
Re: BF3
BF3 is an electrophile because B only has 6e- but it can have can have 8e- since it is an octet.
- Sun Feb 19, 2017 5:23 pm
- Forum: First Order Reactions
- Topic: Half life?
- Replies: 2
- Views: 677
Re: Half life?
I think we still have to know them because they were part of our homework problems.
- Sun Feb 12, 2017 10:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3667185
Re: Post All Chemistry Jokes Here
I was going to make a joke about sodium and hydrogen but NaH
- Sun Feb 12, 2017 10:28 pm
- Forum: Balancing Redox Reactions
- Topic: Question 7 2013 Midterm
- Replies: 2
- Views: 619
Re: Question 7 2013 Midterm
The 10 comes from the specific half reaction of BR2 + 2e ----> 2Br-
- Sun Feb 05, 2017 4:05 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Fall 2016 Finals Still Available?
- Replies: 5
- Views: 1269
Re: Fall 2016 Finals Still Available?
Do you know what time we can pick up our final exams for Chem 14A Fall 2016?
- Sat Jan 28, 2017 6:26 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Mean bond Enthalpies
- Replies: 1
- Views: 503
Mean bond Enthalpies
Do we need to have table 8.7 of the mean bond enthapy memorized for the quiz?
- Sun Jan 22, 2017 11:48 am
- Forum: Phase Changes & Related Calculations
- Topic: Homework [ENDORSED]
- Replies: 2
- Views: 668
Re: Homework [ENDORSED]
On the midterm and the final there is always one problem taken directly for the homework problems. However, doing the homwork problems will preprare you for the quizzes as well, because the quiz problems are similar to the homework problems.
- Sat Jan 14, 2017 1:01 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Weekly posts
- Replies: 3
- Views: 694
Re: Weekly posts
Yes. It willl count as long as it is before Sunday at midnight. For example, For week 1, you must post before Sunday January 15th at 11:59 p.m.
- Tue Nov 29, 2016 12:52 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: Acidity and Basicity Constants [ENDORSED]
- Replies: 1
- Views: 697
Acidity and Basicity Constants [ENDORSED]
Will we have to memorize each Ka for common Acids and Kb value for common Bases, or will they be given to us for the final?
- Sat Nov 26, 2016 7:18 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: [H3O][OH-]=10^-14
- Replies: 2
- Views: 2489
Re: [H3O][OH-]=10^-14
The equilibrium constant for any reaction, is called the water dissociation constant which is Kw. Because every H+ (H3O+) ion that forms is accompanied by the formation of an OH- ion, the concentrations of these ions in pure water are the same and can be calculated from Kw. Therefore, Kw = [H3O+][OH...
- Sun Nov 20, 2016 7:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Bruincast
- Replies: 26
- Views: 10643
Re: Bruincast
Does Bruin cast work on an Ipad or Iphone?
- Sun Nov 20, 2016 7:55 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Discussion next week? [ENDORSED]
- Replies: 5
- Views: 3710
Re: Discussion next week? [ENDORSED]
If we have a Thursday discussion will we have to wait to get our quizzes back until week 10?
- Sun Nov 13, 2016 10:28 pm
- Forum: Naming
- Topic: Quiz 3 prep
- Replies: 3
- Views: 689
Re: Quiz 3 prep
The Chloride is placed after the amine, because the amine in this case always come before the element that is listed after the ion in parenthesis.
- Fri Nov 04, 2016 3:11 pm
- Forum: Lewis Structures
- Topic: Octet rule
- Replies: 7
- Views: 1187
Re: Octet rule
The Central Atom can only have an expanded octet after the 14 element. However, it is a case by case basis, meaning that if it says to follow the octet rule, then depending on the elment, it can or can't have an expanded octet.
- Sat Oct 29, 2016 4:27 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Chemical Equations
- Replies: 6
- Views: 3169
Re: Balancing Chemical Equations
Are we allowed to use fractions when balancing chemical equations as long as we put the coefficient at the front of the equation?
- Sun Oct 23, 2016 1:09 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations
- Replies: 2
- Views: 714
Re: Electron Configurations
I believe we are supposed to write it in increasing numberical order.
- Sat Oct 15, 2016 12:02 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3667185
Re: Post All Chemistry Jokes Here
Why do chemists like nitrates so much?
They're cheaper than day rates. (:
They're cheaper than day rates. (:
- Fri Oct 07, 2016 12:21 pm
- Forum: Properties of Light
- Topic: Question 1.3 on hw
- Replies: 1
- Views: 520
Re: Question 1.3 on hw
I believe that the extent of the change in the electoral field at any given point decreases. The amplitude of the wave is not the one decreasing.
- Fri Sep 30, 2016 9:35 am
- Forum: Balancing Chemical Reactions
- Topic: Writing Reactions
- Replies: 5
- Views: 1234
Re: Writing Reactions
Making flash cards on index notes or quizlet really helped me memorize prefixes, suffixes, and abbreviations for the elements, when you are given a problem in word form.