Search found 22 matches
- Fri Mar 17, 2017 5:50 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 2013 midterm q4
- Replies: 1
- Views: 582
Re: 2013 midterm q4
n= 4 because you must determine the oxidation numbers of each molecule in the reaction. 2 Fe has a oxidation number of 0, 2 H2O has an overall charge of 0 (2H=1+, O=2-), and O2 is also 0. Fe(OH)2 has an overall charge of 0 but the 2 OH groups have a 1- charge and so Fe must be 2+. The oxidation stat...
- Fri Mar 17, 2017 5:38 pm
- Forum: *Cycloalkenes
- Topic: 2013 FINAL Q6A
- Replies: 4
- Views: 1719
2013 FINAL Q6A
Why is the compound 1,5,5,6-tetramethylcyclohex-1-ene not named 2,3,4,4-tetramethylcyclohex-1-ene? Wouldn't the overall numbering of the second one be lower than the first except for the the first substituent?
- Tue Mar 14, 2017 10:41 am
- Forum: *Cycloalkanes
- Topic: Naming the Substituent on the First Carbon
- Replies: 1
- Views: 1298
Re: Naming the Substituent on the First Carbon
Its not optional because in this case you have two substituents and by not labeling it with a 1, it is ambiguous where the ethyl is located.
- Tue Mar 14, 2017 10:39 am
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Difference Between torsional strain, steric strain, and bond angle strain
- Replies: 2
- Views: 5553
Re: Difference Between torsional strain, steric strain, and bond angle strain
A torsional strain is the repulsion caused by the electrons in between different groups when they pass by each other. A steric strain is caused by the electrons in between different groups. Steric strain cannot be lessened by rotating the molecule around a bond. An angle strain is caused when the ac...
- Tue Mar 07, 2017 10:08 pm
- Forum: *Nucleophiles
- Topic: Nucleophilic Strength Guidelines
- Replies: 1
- Views: 1270
Re: Nucleophilic Strength Guidelines
If a nucleophile has a negative charge not a partial negative charge, the more negative the charge is, the stronger the nucleophile. After will come the nucleophiles with partial negative charges due to difference in electronegativity, last will be nucleophiles with the lone pairs or double bonds pr...
- Tue Mar 07, 2017 10:05 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Calculating Activation Energy
- Replies: 1
- Views: 571
Re: Calculating Activation Energy
If its not given, you can easily solve for it by taking the ln of the Arrhenius equation which will give you ln k= -Ea/RT + lnA which follows y=mx+b so your slope would just be -Ea/R if the x-axis is 1/T.
- Tue Feb 28, 2017 11:28 am
- Forum: *Electrophiles
- Topic: electrophiles and nucleophiles
- Replies: 2
- Views: 669
Re: electrophiles and nucleophiles
Electrophiles are missing electrons so they are attracted to positive charges while ucleophiles more negative and have more electrons so they will have negative charges. You can remember that bases are nucleophiles and all acids are electrophiles.
- Sun Feb 19, 2017 8:46 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
Q: What did the chemical agent say?
A: My name is Bond, Ionic Bond. Taken, not shared
A: My name is Bond, Ionic Bond. Taken, not shared
- Sun Feb 19, 2017 8:45 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel:
Fe - Fe
/ \
Fe Fe
\ /
Fe - Fe
A: A ferrous wheel:
Fe - Fe
/ \
Fe Fe
\ /
Fe - Fe
- Mon Feb 06, 2017 5:09 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Inert Conductor in cell diagrams
- Replies: 1
- Views: 572
Re: Inert Conductor in cell diagrams
You will need an inert conductor when the solution is comprised of only ions and no solid metals. For example, Zn(s) + Cu2+ → Zn2+ + Cu(s) does not need an inert conductor because each side of the electrode solution has a metal, but if either the reactants or the product's had two aqueous compounds ...
- Fri Feb 03, 2017 9:46 am
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: 14.23
- Replies: 2
- Views: 743
Re: 14.23
For calculating for the standard potential energy it doesn't depend on the number of moles because its an intensive property
- Wed Jan 25, 2017 11:05 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
Q: What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A: A ferrous wheel:
A: A ferrous wheel:
- Sat Jan 21, 2017 12:45 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
Q: Why did the noble gas cry?
A: Because all his friends Argon
A: Because all his friends Argon
- Wed Jan 11, 2017 8:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
How many moles are in a guacamole? Avocado's number.
- Mon Nov 28, 2016 11:34 am
- Forum: Conjugate Acids & Bases
- Topic: is h3o related to oh-
- Replies: 2
- Views: 3940
Re: is h3o related to oh-
H3O+ and OH- are also both related acid base reactions. A base will form OH- while an acid will form H3O+. Both reactions for acids and bases will start out with either a base or acid and H2O. The H3O+ and OH- is formed as a product from the H2O in both cases.
- Mon Nov 28, 2016 11:26 am
- Forum: Conjugate Acids & Bases
- Topic: Dissociation
- Replies: 1
- Views: 669
Re: Dissociation
CH3COOH + H2O -> CH3COO- + H3O+ Is the equation for this dissociation. The Ka value will either be given or you have to find it. You can find the amount of the product that is dissociated using the Ka value that would be given in this case it is 1.8× 10–5 M. You will use [CH3COO-][H3O+]/[CH3COOH]=Ka...
- Sun Nov 13, 2016 10:31 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 3
- Views: 713
Re: Ligands
A ligand is the molecule that will donate a lone pair to the central metal ion in a coordinate compound.
- Mon Nov 07, 2016 4:16 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligands
- Replies: 3
- Views: 713
Re: Ligands
Denticity is basically number bonds they can form with the metal ion. A ligand will be bidentate if it can make two bonds with the metal ion and tridentate if it can form three. You can tell a ligand will be mono-, bi-, or tri- dentate by looking at the number of atoms that can donate an electron pa...
- Sun Oct 30, 2016 2:53 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
What do you call Iron blowing in the wind?
Febreeze
Febreeze
- Mon Oct 24, 2016 1:07 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
"Tell me a potassium joke!"
"K"
"K"
- Tue Oct 18, 2016 12:02 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3862568
Re: Post All Chemistry Jokes Here
*When you dilute a solution*
Oh I'm sorry, did I break your concentration?
Oh I'm sorry, did I break your concentration?
- Fri Sep 30, 2016 3:19 pm
- Forum: Photoelectric Effect
- Topic: Minor Rounding Detail Question
- Replies: 4
- Views: 994
Re: Minor Rounding Detail Question
I would use 3.00 x 10^8 because the value of the speed of light is 2.99792 x 10^8. Therefore, I would round up to 3.00 x 10^8.