Search found 15 matches

by Katherine Jabba 2H
Wed Mar 09, 2016 10:46 pm
Forum: *Alkenes
Topic: Multiple Double Bonds
Replies: 1
Views: 269

Re: Multiple Double Bonds

That is fine. You can also put the numbers in front of the parent chain name if its a more simple molecule.
by Katherine Jabba 2H
Wed Mar 09, 2016 10:43 pm
Forum: *Electrophilic Addition
Topic: Picking out Intermediates
Replies: 1
Views: 445

Re: Picking out Intermediates

The first step of the two step reaction may have two products. For example a Br- ion and an organic compound with a positive charge on one of the carbons may be the two intermediaries of a two step reaction.
by Katherine Jabba 2H
Wed Mar 02, 2016 5:51 pm
Forum: *Alkanes
Topic: Nucleophile vs electrophile
Replies: 2
Views: 260

Re: Nucleophile vs electrophile

Carbonyls are also electrophiles even though the don't necessarily look like them.
by Katherine Jabba 2H
Wed Mar 02, 2016 5:47 pm
Forum: *Cycloalkanes
Topic: Numbering Carbons
Replies: 3
Views: 388

Re: Numbering Carbons

Double and triple bonds have priority over substituents and should always be given the lowest possible number. For substituents, you give priority to them based on alphabetical order. Alphabetical order does not include any of the prefixes (di, tri, etc.) and it does not include the common prefixes ...
by Katherine Jabba 2H
Wed Mar 02, 2016 5:42 pm
Forum: *Cycloalkanes
Topic: Quiz 3 First Preparation #5
Replies: 1
Views: 290

Quiz 3 First Preparation #5

Question #5 shows a cycloalkene with iodine and bromine attached and asks you to name it. I named the compound 1-bromo-3-iodo cyclohexane, because I thought that the substituents should be placed in alphabetical order and if there was a "tie", you named the one alphabetically first with th...
by Katherine Jabba 2H
Fri Feb 19, 2016 5:18 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7750
Views: 1066739

Re: Chemistry Jokes

A cloud of helium floats into a bar. The bartender says, "Hey! We don't serve noble gases here."

The helium does not react.
by Katherine Jabba 2H
Fri Feb 19, 2016 5:07 pm
Forum: Experimental Details
Topic: Pre Equilibruim Approach
Replies: 6
Views: 724

Re: Pre Equilibruim Approach

The pre-equilibirum approach uses a psuedo-equilibrium situation where one of the steps of the reaction is said to be at equilibrium and set equal to K, the equilibirum constant. This equation involving K is then manipulated and subsituted into the other reaction rate equation, so that the the react...
by Katherine Jabba 2H
Thu Feb 04, 2016 12:31 pm
Forum: Balancing Redox Reactions
Topic: Oxidation Numbers for O2 and O3
Replies: 1
Views: 5275

Re: Oxidation Numbers for O2 and O3

The oxidation number for elements in their natural forms is zero because these compounds are extremely stable. The oxidation number represents the number of electrons the element can give away (if positive) or lose (if negative). Such stable molecules have no electrons to lose or gain. The oxidation...
by Katherine Jabba 2H
Sun Jan 24, 2016 5:07 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Why does isothermal mean no change in internal energy?
Replies: 2
Views: 411

Why does isothermal mean no change in internal energy?

Why is it that if something is isothermal, that the change in U is zero? I was trying to derive this from the equations we learned in class, but I can't seem to remember/figure it out. Thanks!
by Katherine Jabba 2H
Fri Jan 15, 2016 4:50 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Constant Volume & Internal Energy
Replies: 1
Views: 208

Constant Volume & Internal Energy

How does constant volume, as opposed to constant pressure, Internal Energy? On page 25 of the course reader it states then if the change in V=0, then the Change in U=qv, but I'm not really sure what qv means.
by Katherine Jabba 2H
Thu Jan 07, 2016 3:47 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law Enthalpy-Textbook Error? Or am I lost?
Replies: 2
Views: 264

Hess's Law Enthalpy-Textbook Error? Or am I lost?

While working on homework problem 8.55, I noticed that I was having trouble canceling out the two given standard reactions to get the reaction enthalpy for the production of metallic barium. When I checked the solutions manual, the 2nd equation was listed as 2Al(s) + 3/2O2(g) --> Al203(s) instead of...
by Katherine Jabba 2H
Mon Nov 23, 2015 9:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Video: Equilibrium Concentration Fall 2012 Q6A
Replies: 3
Views: 482

Video: Equilibrium Concentration Fall 2012 Q6A

A video by Katherine Jabba(3I), Erik Whitney (3G), and Carolyn Stephens (3H) explaining an equilibrium concentration problem (#6A) from the Fall 2012 Final Exam. We hope this helps any students who are confused! Question: A vial of SO2 (0.522 M) and O2 (0.633 M) react and reach equilibrium. Calculat...
by Katherine Jabba 2H
Sun Oct 11, 2015 10:15 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Relevance of Electron Spin
Replies: 1
Views: 329

Relevance of Electron Spin

I understand how electron spins work, and the rules associated with pairing electrons and their spins. However, I don't understand what electron spins truly mean, and the role they play in the makeup of the atom.
by Katherine Jabba 2H
Fri Oct 02, 2015 5:25 pm
Forum: Properties of Electrons
Topic: Relevance/Difference btwn the series of hydrogen constants?
Replies: 1
Views: 2233

Relevance/Difference btwn the series of hydrogen constants?

Could someone explain the differences between the Lyman, Balmer, Paschen, and Brackett series? I know that they consecutivley begin with n=1, n=2, n=3, and n=4, but I don't understand exactly what that actually means in terms of the hydrogen atom.

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