Search found 20 matches

by 604599327
Fri Mar 11, 2016 10:08 am
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Torsional strain
Replies: 4
Views: 638

Re: Torsional strain

I'm pretty sure that torsional strain can never be negative and can only be as low as 0 (when there is no strain).
by 604599327
Mon Mar 07, 2016 6:40 pm
Forum: *Amines
Topic: Double/Triple Bonds vs. Functional Groups
Replies: 1
Views: 1162

Re: Double/Triple Bonds vs. Functional Groups

Here is an important list of rules to remember when naming organic compounds with double and triple bonds (you might also want to go on this site to see other rules and examples): http://www.chem.uiuc.edu/GenChemReferences/nomenclature_rules.html"onclick="window.open(this.href);return false; 1. The ...
by 604599327
Sun Feb 28, 2016 3:38 pm
Forum: *Alkanes
Topic: Iso vs. Neo
Replies: 2
Views: 391

Re: Iso vs. Neo

Also remember that other prefixes such as sec and tert can be used... Iso and neo are basically used for alkyl groups and sec and tert are used for carbon atoms which have functional groups, charge or are radicals. Prefix sec- is used for those carbon atoms which are joined to two other carbon atoms...
by 604599327
Mon Feb 22, 2016 9:33 pm
Forum: *Nucleophiles
Topic: Nucleophiles vs. Ligand
Replies: 3
Views: 1229

Re: Nucleophiles vs. Ligand

It is all about the specifics of the molecule that makes them different. Ligands are molecules and atomic groups bonded for central atom of complex molecule. Nucleophiles are molecules or atomic groups with affinity towards positively charged groups. They are negatively charged. So the main differen...
by 604599327
Tue Feb 16, 2016 11:25 am
Forum: General Rate Laws
Topic: Including k in rate laws
Replies: 4
Views: 550

Re: Including k in rate laws

Yeah for the vast majority of problems involving the rate law, the k value is essential in understanding the reaction and will typically be required on a quiz question.
by 604599327
Mon Feb 08, 2016 8:03 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Multiple Oxidation Half-Reactions?
Replies: 1
Views: 385

Re: Multiple Oxidation Half-Reactions?

I would use whichever half-reaction that best matches the given reaction as this should reduce any possibility of your voltage being different from the answer. Also I think with the information given that the book answer made the most sense.
by 604599327
Fri Jan 29, 2016 5:07 pm
Forum: Balancing Redox Reactions
Topic: Determining the Oxidation Number
Replies: 1
Views: 262

Re: Determining the Oxidation Number

Each atom of Cr is 2+, however, in the reaction if there are 2Cr2+, then the total for that part of the redox reaction would be 4+.
by 604599327
Sat Jan 23, 2016 7:43 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Closed Systems Question
Replies: 2
Views: 458

Re: Closed Systems Question

Although a closed system can exchanged heat or work with its surroundings, it cannot exchange matter. This means that although there is a transfer of energy there is a conservation of the matter in a system.
by 604599327
Wed Jan 20, 2016 2:06 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: What influence the degeneracy?
Replies: 1
Views: 377

Re: What influence the degeneracy?

Systems are said to be degenerate if they give the same value of energy upon measurement. In addition to volume, I believe that pressure and temperature can also influence degeneracy.
by 604599327
Mon Jan 11, 2016 11:48 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Problem 8.7
Replies: 2
Views: 419

Re: Problem 8.7

Are you sure that was the final equation for problem 8.7, I thought it was a work and internal energy question and thus the equation to use would be w=deltaU-q with a final answer of +4.90x10^2J
by 604599327
Thu Dec 03, 2015 1:20 pm
Forum: *Indicators
Topic: Stoich and End Points
Replies: 3
Views: 785

Re: Stoich and End Points

The key is to find the point at which the acid or base of the sample and the respective acid or base of the titration reach a balance (stoichiometric point), thus it would be important that the end point be close to the stoichiometric point in an accurate reaction.
by 604599327
Sun Nov 29, 2015 10:18 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acids with Carbon
Replies: 2
Views: 469

Re: Acids with Carbon

Due to the delocalization of the negative charge and the resulting instability of these types of acids, their ions will reform more quickly and thus be less acidic, causing acids with carbon to be weak acids.
by 604599327
Thu Nov 19, 2015 2:28 pm
Forum: Naming
Topic: Cobalt and Cobaltate?
Replies: 2
Views: 543

Re: Cobalt and Cobaltate?

Yes, you would use the "ate" suffix version if the compound is an anion, or has a negative charge, while the regular version would be used for positive or if the net charge is 0. Also I believe that [Co(NH3)6]^(3+) is Hexaamminecobalt(III) and [Co(CN)5(H20)]^(2-) is Aquopentacyanocobaltate...
by 604599327
Sun Nov 15, 2015 9:59 pm
Forum: Naming
Topic: Naming
Replies: 1
Views: 300

Re: Naming

I do not think that it would be a bad thing to know all of them, however, the quiz and subsequently the final as well will probably use only ones that Professor Lavelle or the textbook uses.
by 604599327
Mon Nov 09, 2015 10:36 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Gibbs Free Energy Equation (11.29 HW)
Replies: 1
Views: 321

Re: Gibbs Free Energy Equation (11.29 HW)

If it is not in the course reader, I would not expect it to be on a test, however, it could not hurt to learn it to at least some degree...
by 604599327
Sun Nov 01, 2015 4:51 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Ionization energy and bond order
Replies: 1
Views: 430

Re: Ionization energy and bond order

No, I believe that there is no relationship between the two. For example, in the diatomic molecules N2 (bond order=3), O2 (bond order=2), and F2 (bond order=1), oxygen has the lowest ionization energy, but a higher bond order than fluorine.
by 604599327
Sun Oct 25, 2015 9:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework question 4.13d
Replies: 2
Views: 386

Re: Homework question 4.13d

The central atom is the atom that is the least electronegative. For that reason, N will be the central atom.
by 604599327
Sun Oct 18, 2015 6:04 pm
Forum: Octet Exceptions
Topic: Radical Lewis Diagram 3.59a
Replies: 2
Views: 438

Re: Radical Lewis Diagram 3.59a

For most molecules, although formal charges of 0 mean that it is in its most stable state, it is more important that the atoms follow the octet rule. Since Cl and O do not have a d orbital, it would be difficult for them to form an expanded octet, yielding the answer provided in the answer book.
by 604599327
Sat Oct 10, 2015 9:36 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Shielding Effect
Replies: 5
Views: 815

Re: Shielding Effect

Also, although the electrons are never positive, they do increase in energy as they move away from the center i.e. as n goes to infinity, E gets closer and closer to 0.
by 604599327
Fri Oct 02, 2015 2:07 pm
Forum: SI Units, Unit Conversions
Topic: How do you go from meter to nanometer? [ENDORSED]
Replies: 7
Views: 1550

Re: How do you go from meter to nanometer? [ENDORSED]

Because a nanometer is 1.0 x 10^-9 of a meter, 340 nm is equivalent to 3.4 x 10^-7 m. Essentially, it is only a different way to write the same amount.

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