Search found 27 matches
- Sat Mar 18, 2017 9:05 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: 2015 Final 6B
- Replies: 1
- Views: 536
Re: 2015 Final 6B
Catalysts are always okay to have in the rate law b/c they are originally present and then reformed but intermediates are not as they are formed and then gone.
- Tue Mar 14, 2017 1:40 pm
- Forum: *Alcohols
- Topic: Functional Groups and Double/Triple Bonds
- Replies: 1
- Views: 1232
Re: Functional Groups and Double/Triple Bonds
I think that this would be something we are tested on, meaning an alkene or alkyne and another functional group in the parent chain.
- Tue Mar 14, 2017 1:39 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst Equation
- Replies: 2
- Views: 630
Re: Nernst Equation
It will be given to us on the formula sheet.
- Tue Mar 14, 2017 1:37 pm
- Forum: *Alkenes
- Topic: Alkenes as functional groups
- Replies: 1
- Views: 517
Re: Alkenes as functional groups
If the alkene is part of the longest parent chain, it is thought of as a functional group part of that chain, meaning that it must be prioritized in naming. This is is different from a substituent which is attached separately somewhere along the parent chain.
- Mon Mar 06, 2017 12:31 pm
- Forum: *Alkanes
- Topic: Molecular Formula and Chemical Structure
- Replies: 2
- Views: 556
Re: Molecular Formula and Chemical Structure
This is saying that we don't know the specific structure of compounds with more than 4 carbon atoms due to the existence of constitutional isomers b/c of different unbranched/branched structures.
- Mon Mar 06, 2017 12:17 pm
- Forum: *Cycloalkenes
- Topic: Naming: IUPAC & Common Naming
- Replies: 2
- Views: 645
Re: Naming: IUPAC & Common Naming
According to the textbook, IUPAC naming and common naming can be combined when naming compounds.
- Thu Feb 23, 2017 2:17 pm
- Forum: *Electrophiles
- Topic: electrophile vs neutrophile
- Replies: 2
- Views: 703
Re: electrophile vs neutrophile
it is positive and wants to gain electrons!
- Sun Feb 19, 2017 4:31 pm
- Forum: General Rate Laws
- Topic: Unique rate law Question 15.5(A)
- Replies: 1
- Views: 498
Re: Unique rate law Question 15.5(A)
Write it as a positive answer! This is how the solutions manual does it :)
- Thu Feb 09, 2017 3:38 pm
- Forum: Balancing Redox Reactions
- Topic: Redox Memorization Tips
- Replies: 4
- Views: 1872
Redox Memorization Tips
What are some memorization tactics for knowing what is getting oxidized and whats getting reduced?
- Thu Feb 02, 2017 3:48 pm
- Forum: Balancing Redox Reactions
- Topic: reduction vs. oxidation
- Replies: 3
- Views: 785
Re: reduction vs. oxidation
The oxidizing number is shown by the charge of each molecule involved in the reaction. For example: the charge of O is -2. Then, you look at which molecule has been reduced (gained electrons) and which has been oxidized (lost electrons) on the product side.
- Thu Jan 26, 2017 3:48 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Entropy moles
- Replies: 2
- Views: 619
Re: Entropy moles
This is because Delta S Subscript M is given per mole so you must always divide by the number of moles of the substance to get it to be per 1 mole. :)
- Fri Jan 20, 2017 9:44 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Standard Enthalpy of Formation and Specific Heat Capacity [ENDORSED]
- Replies: 1
- Views: 575
Re: Standard Enthalpy of Formation and Specific Heat Capacity [ENDORSED]
I believe that we will be given all of the values for standard enthalpy of formation and specific heat capacity for a problem presented on quizzes/tests. I don't think we are required to memorize any of these values.
- Sun Jan 15, 2017 9:40 pm
- Forum: Phase Changes & Related Calculations
- Topic: Temp in Phase Change
- Replies: 3
- Views: 723
Re: Temp in Phase Change
Changing the amount of heat energy usually causes a temperature change. However, during the phase change, the temperature stays the same even though the heat energy changes. This energy is going into changing the phase and not into raising the temperature. This means that there is a constant tempera...
- Sat Dec 03, 2016 4:32 pm
- Forum: General Science Questions
- Topic: Chem 14B Discussion 1K
- Replies: 1
- Views: 826
Re: Chem 14B Discussion 1K
I'd like to switch! I have Lec 1 Disc 1D if you're interested. My email is shadikeyvani386@yahoo.com.
- Sat Dec 03, 2016 4:26 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Final 2015 Q2A
- Replies: 1
- Views: 608
Re: Final 2015 Q2A
As the question states, this equation from the experimentally observed H-atom line spectrum, so it is empirical since it is based on observation rather than simply theory.
- Sat Dec 03, 2016 4:24 pm
- Forum: Polyprotic Acids & Bases
- Topic: Fall 2012 Final Exam Question 8
- Replies: 1
- Views: 625
Re: Fall 2012 Final Exam Question 8
The second dissociation results in 5.6 x 10^-11 mol/L which we add to 4.0 x 10^-5 and end up with 4.0x 10^-5 mol/L because 5.6 x 10^-11 mol/L is so small in relation that makes it have no significance when the addition is done.
- Sat Dec 03, 2016 4:18 pm
- Forum: Naming
- Topic: charge question
- Replies: 1
- Views: 515
Re: charge question
Cations all have positive charge and anions all have negative charge.
- Sat Dec 03, 2016 4:13 pm
- Forum: Naming
- Topic: Naming Coordination Compounds
- Replies: 2
- Views: 728
Re: Naming Coordination Compounds
If there is already a prefix in the name of the ligand (for example, ethylenediamine) and you have 2 or more of that in your coordination compound, you would use bis, tris, etc. to indicate that.
- Wed Nov 16, 2016 11:01 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Correct way to write molecular configuration?
- Replies: 1
- Views: 424
Re: Correct way to write molecular configuration?
I don't think we have to specify the specific ones based on the book and solution manual.
- Wed Nov 16, 2016 10:59 pm
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: Heteronuclear Molecule MO notation
- Replies: 1
- Views: 1113
Re: Heteronuclear Molecule MO notation
This is for all heteronuclear models.
- Wed Nov 16, 2016 10:58 pm
- Forum: Naming
- Topic: What's the formula for this coordination compound?
- Replies: 2
- Views: 3338
Re: What's the formula for this coordination compound?
[CoBr2(en)2] SO4 but I think it should be an ion with a negative 1 charge.
- Mon Nov 07, 2016 11:56 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: How does H2+ exist?
- Replies: 1
- Views: 2641
Re: How does H2+ exist?
From my understanding, an element with a bond order of 0 cannot exist but those with fractional values exist and are not stable.
- Mon Oct 31, 2016 11:03 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2758243
Re: Post All Chemistry Jokes Here
Hallow=Hallow : Halloween!
(Double bond means "ene")
(Double bond means "ene")
- Sun Oct 23, 2016 8:25 pm
- Forum: Lewis Structures
- Topic: Lewis Structure
- Replies: 3
- Views: 2532
Re: Lewis Structure
Another disadvantage could be the lack of 3 dimensional modeling. The specific shape of the molecule is not made known by the Lewis Structure.
- Sun Oct 23, 2016 8:21 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma and Pi bonds
- Replies: 1
- Views: 560
Re: Sigma and Pi bonds
You don't need to know this for Quiz 2, it will be covered in Chapter 4.
- Sun Oct 09, 2016 4:14 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2758243
Re: Post All Chemistry Jokes Here
What element is a girl's future best friend?
Carbon!
Carbon!
- Sun Sep 25, 2016 7:41 pm
- Forum: Empirical & Molecular Formulas
- Topic: Determining Empirical Formula from Ball and Stick Structures [ENDORSED]
- Replies: 1
- Views: 4035
Determining Empirical Formula from Ball and Stick Structures [ENDORSED]
I understand how to determine the molecular formula, but how would I find the empirical formula based on the structures? Question F.25