Search found 24 matches
- Fri Mar 17, 2017 5:59 pm
- Forum: *Aldehydes
- Topic: Names of certain functional groups
- Replies: 2
- Views: 1511
Re: Names of certain functional groups
There are only a few so I'd recommend learning them. But, I'm pretty sure we just need to know how to use them in naming.
- Mon Mar 13, 2017 8:55 pm
- Forum: *Cyclopentanes
- Topic: Question on the eclipsed bonds of Cyclopentanes
- Replies: 2
- Views: 1467
Re: Question on the eclipsed bonds of Cyclopentanes
The ball and stick model shown in the course reader is contoured to display the actual structure of the molecule. Due to the strain, the atoms shift so that they are no eclipsed bonds.
- Sun Mar 12, 2017 9:50 am
- Forum: *Alkanes
- Topic: PRIORITY IN NAMING
- Replies: 1
- Views: 665
Re: PRIORITY IN NAMING
Thank you!
- Fri Mar 03, 2017 1:11 pm
- Forum: *Electrophiles
- Topic: ambident nucleophiles
- Replies: 3
- Views: 1285
Re: ambident nucleophiles
Both N and S have a lone pair, so either can donate this to form a coordinate covalent bond.
- Mon Feb 27, 2017 2:05 pm
- Forum: *Nucleophiles
- Topic: Nucleophiles that are Neutral?
- Replies: 2
- Views: 948
Re: Nucleophiles that are Neutral?
If you remember from chem 14a, some atoms may have empty orbitals. Filling these will give the atom increased stability and therefore they attract electrons to fill up these orbitals.
- Tue Feb 21, 2017 3:55 pm
- Forum: General Rate Laws
- Topic: Slow Step
- Replies: 3
- Views: 728
Re: Slow Step
The slow step isn't required to find the mechanism. In the mechanism we look for the slowest step and consider it the rate determining step. This is determined by experimentally.
- Sun Feb 12, 2017 9:21 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Reducing Hydrogen Ions
- Replies: 1
- Views: 504
Re: Reducing Hydrogen Ions
Hydrogen has an electric potential of 0. By definition, a species with a lower electric potential has higher reducing nature (higher tendency to take electrons) and therefore only negative cell potentials can reduce H *spontaneously*.
- Mon Feb 06, 2017 12:34 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: pH and the Cell Potential
- Replies: 2
- Views: 637
Re: pH and the Cell Potential
The pH of the solution represents the concentration of the Hydrogen ions in the solution. By inserting these concentrations into the Nernst equation we can calculate the cell potential.
- Mon Jan 30, 2017 2:38 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Quiz 1 prep #9
- Replies: 2
- Views: 606
Re: Quiz 1 prep #9
Gibbs free energy and entropy of a system are both state function. As the process is a cyclic function, the system always returns to the same state. Hence, as it returns to the same state the change is 0 in the aforementioned properties.
- Sun Jan 29, 2017 7:01 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Understanding Gibbs Free Energy Conceptually
- Replies: 1
- Views: 521
Re: Understanding Gibbs Free Energy Conceptually
Conceptually, Gibbs free energy is a thermodynamic potential that describes the system.
- Tue Jan 24, 2017 12:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2957993
Re: Post All Chemistry Jokes Here
A pessimist sees a glass half empty, an optimist sees a glass half full, but a chemist sees a glass half filled with H2O.
- Wed Jan 18, 2017 2:18 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: A System at Constant Volume
- Replies: 3
- Views: 796
Re: A System at Constant Volume
Closed and isolated systems are always at constant volume whereas an open system may experience a change in volume.
- Wed Jan 11, 2017 3:13 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam Severe Burns Question
- Replies: 3
- Views: 624
Re: Steam Severe Burns Question
The enthalpy of condensation is very high and as this is exothermic it ends up causing burns.
- Tue Nov 29, 2016 11:00 am
- Forum: Identifying Acidic & Basic Salts
- Topic: Telling if oxides are acidic or basic
- Replies: 1
- Views: 677
Re: Telling if oxides are acidic or basic
Oxides of the first two groups are basic and as you move towards the right the acidic nature of the oxides start to increase. The oxides on the far right are always acidic but the ones in the middle may be amphoteric or acidic. There are only a few amphoteric oxides so I'd reccomend that you memoriz...
- Mon Nov 21, 2016 4:03 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2957993
Re: Post All Chemistry Jokes Here
Q: What do chemists call a benzene ring with iron atom in the middle?
A: A ferrous wheel!
A: A ferrous wheel!
- Mon Nov 14, 2016 7:44 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Numbers [ENDORSED]
- Replies: 4
- Views: 1068
Re: Coordination Numbers [ENDORSED]
nitrito--> 1 carbanato--> 1 sulfato---> 1 edta--> 4
- Tue Nov 08, 2016 1:19 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: MO Diagrams
- Replies: 2
- Views: 606
Re: MO Diagrams
Bonding involves only the outermost valence electrons. Since the 1s orbitals do not participate in bonding they are not included in the diagram.
- Mon Oct 31, 2016 5:53 pm
- Forum: Hybridization
- Topic: Hybridization Order
- Replies: 4
- Views: 881
Re: Hybridization Order
In some cases it is different because dsp2 and sp2d are both different.
- Sat Oct 22, 2016 7:41 pm
- Forum: Bond Lengths & Energies
- Topic: Bond Lengths
- Replies: 3
- Views: 866
Re: Bond Lengths
Generally, a triple bond is stronger than a double which in turn is stronger than a single bond. However, to know for sure we must look at the bond disassociation energies to find out which one is the strongest.
- Fri Oct 21, 2016 7:47 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2957993
Re: Post All Chemistry Jokes Here
You're Berryllium Gold Titanium Flourine Uranium Lithium (Be Au Ti F U Li) dressed.
- Fri Oct 14, 2016 12:47 am
- Forum: Trends in The Periodic Table
- Topic: Atomic Size in a Group
- Replies: 1
- Views: 461
Re: Atomic Size in a Group
It is because of the poor shielding effect of d orbitals as compared to s and p orbitals.
- Thu Oct 13, 2016 9:34 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2957993
Re: Post All Chemistry Jokes Here
I tell bad chemistry jokes because all the good ones Argon.
- Thu Oct 06, 2016 4:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: Chemistry Humor
- Replies: 26
- Views: 5425
Re: Chemistry Humor
I once told a chemistry joke, but there was no reaction...
- Wed Sep 28, 2016 11:05 am
- Forum: Administrative Questions and Class Announcements
- Topic: Peer Facilitated Learning Sessions
- Replies: 32
- Views: 13313
Re: Peer Facilitated Learning Sessions
Can we attend any days session?