Search found 24 matches

by Rebecca_Arnold_3I
Sat Mar 18, 2017 1:29 pm
Forum: General Rate Laws
Topic: Unique Rate of Reaction
Replies: 1
Views: 274

Unique Rate of Reaction

What is the difference between the unique rate of reaction and just the reaction rate? Also, how would you calculate the unique rate of reaction?
by Rebecca_Arnold_3I
Tue Mar 14, 2017 8:19 pm
Forum: *Electrophilic Addition
Topic: Attachment of Atoms
Replies: 5
Views: 864

Re: Attachment of Atoms

Ok thank you!
So if one carbon had fewer hydrogens attached to it, the H from the HBr would attach to the carbon with lesser hydrogens?
by Rebecca_Arnold_3I
Mon Mar 13, 2017 2:24 pm
Forum: *Electrophilic Addition
Topic: Attachment of Atoms
Replies: 5
Views: 864

Attachment of Atoms

In the reaction CH3CH=CHCH3 + HBr does it matter on which side the Hydrogen attaches to first? I know that it attaches to one of the Carbons that is involved with the double bond, but does it matter which Carbon?
by Rebecca_Arnold_3I
Sun Mar 12, 2017 7:04 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Staggered vs. Eclipsed
Replies: 2
Views: 328

Staggered vs. Eclipsed

So I know that the eclipsed conformation is higher in energy than the staggered conformation. However, I am not completely sure on why this is. Is it because the C-H bonds for the eclipsed conformation are closer together?
by Rebecca_Arnold_3I
Thu Mar 09, 2017 10:04 pm
Forum: *Cycloalkanes
Topic: Priority
Replies: 1
Views: 327

Priority

If a cyclopentane has one isopropyl on one Carbon and two methyl groups both attached to the Carbon right next to it, how would you know which to number first? Would the isopropyl group be numbered as 1 or would the two methyl groups be 1?
by Rebecca_Arnold_3I
Mon Mar 06, 2017 7:28 pm
Forum: *Alcohols
Topic: Double Bonded Carbons
Replies: 1
Views: 274

Double Bonded Carbons

If an alcohol has a double bond between two carbons and has 3 carbons in its longest chain, would it be propenol instead of propanol?
Is it possible to have a double bond in an alcohol?
by Rebecca_Arnold_3I
Sat Mar 04, 2017 5:49 pm
Forum: *Complex Reaction Coordinate Diagrams
Topic: Naming compounds
Replies: 1
Views: 547

Re: Naming compounds

Number the Carbons so that the substituents are attached to the lowest numbered Carbon possible.
by Rebecca_Arnold_3I
Sat Mar 04, 2017 5:47 pm
Forum: *Cycloalkanes
Topic: Tert- Butyl
Replies: 2
Views: 313

Re: Tert- Butyl

Oh I see!
Thank you so much :)
by Rebecca_Arnold_3I
Fri Mar 03, 2017 12:27 pm
Forum: General Rate Laws
Topic: Catalysts
Replies: 2
Views: 426

Re: Catalysts

Catalysts can be included in the rate law!
I'm not sure on whether or not they affect the order of the reaction though.
by Rebecca_Arnold_3I
Fri Mar 03, 2017 12:24 pm
Forum: *Cycloalkanes
Topic: Tert- Butyl
Replies: 2
Views: 313

Tert- Butyl

I'm a little confused on the difference between tert- and iso- butyl.
What is the reason that one substituent is named tert-butyl while another is named iso-butyl?
by Rebecca_Arnold_3I
Wed Mar 01, 2017 11:28 am
Forum: Zero Order Reactions
Topic: Collision of Molecules
Replies: 1
Views: 346

Collision of Molecules

I know that reaction orders of 3+ or rare because it's hard for three molecules to collide at the same time with the same energy to react.
I'm a little confused on 0 order, though. Does this rate order have to do with the collision of molecules as well? How many molecules collide here?
by Rebecca_Arnold_3I
Sun Feb 26, 2017 7:22 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G = delta G (standard) + RT ln(Q)
Replies: 1
Views: 491

Delta G = delta G (standard) + RT ln(Q)

Hello!
When solving the equation Delta G = delta G (standard) + RT ln(Q), are you allowed to mix concentrations and pressures of the reactants and products depending on which values are given to get Q? Or can only one type be used throughout the Q expression?
by Rebecca_Arnold_3I
Sun Dec 04, 2016 1:00 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: How to determine the strength of acids?
Replies: 3
Views: 841

Re: How to determine the strength of acids?

Also, stronger acids will generally have a greater number of oxygens. For example in number 2- HCl02 will be a stronger acid than HClO.
by Rebecca_Arnold_3I
Sat Dec 03, 2016 12:05 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 1
Views: 279

Electron Affinity

I noticed that oxygen and sulfur have two electron affinity values. One is positive, whereas the other is very negative. Why is this? Do the values correspond to the first and second values of electron affinity when more than one electron is added?
by Rebecca_Arnold_3I
Fri Dec 02, 2016 9:06 pm
Forum: Naming
Topic: Naming ligands and writing ligands alphabetically? [ENDORSED]
Replies: 4
Views: 547

Re: Naming ligands and writing ligands alphabetically? [ENDORSED]

Yes, it is referring to the name of the ligands and you would write ammine before aqua because of this alphabetical order. I'm not sure about whether or not it matters if you are writing the formula though...
by Rebecca_Arnold_3I
Fri Dec 02, 2016 9:03 pm
Forum: *Titrations & Titration Calculations
Topic: End point vs. Equivalence point
Replies: 1
Views: 781

End point vs. Equivalence point

What is the difference between the equivalence and end point of a titration curve? I know that the equivalence point is where the moles of acid = the moles of base, but I'm not sure about an end point. Thank you!!
by Rebecca_Arnold_3I
Sun Nov 27, 2016 10:38 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Increasing Pressure
Replies: 1
Views: 305

Increasing Pressure

Is it true that when the pressure increases, the volume decreases? If this is the case and the pressure of the reaction increases- why does the reaction favor the side with fewer moles of gas and try to move towards that? Thank you!!
by Rebecca_Arnold_3I
Sun Nov 13, 2016 11:06 pm
Forum: Naming
Topic: Ethylenediamine
Replies: 1
Views: 278

Ethylenediamine

So the neutral ligand amine is NH3. However, the ligand ethylenediamine has NH2 on either end instead of NH3. Why is this the case? Thank you so much!
by Rebecca_Arnold_3I
Mon Nov 07, 2016 12:11 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordinate Number
Replies: 3
Views: 507

Coordinate Number

When a ligand is a compound, is the coordination number affected by the number of bonds in this compound, or does the coordination number only apply to the bonds that are directly bonded to the central atom? Thank you!
by Rebecca_Arnold_3I
Sun Oct 23, 2016 8:27 pm
Forum: Dipole Moments
Topic: Polar vs. Nonpolar Covalent Bonds
Replies: 1
Views: 761

Polar vs. Nonpolar Covalent Bonds

I know that there is a rough guideline for the electronegativity differences in atoms that can be used to determine whether a compound has an ionic or covalent bond. Is there a rough cutoff for when a compound is polar covalent vs. nonpolar covalent? If yes, what is this electronegativity difference...
by Rebecca_Arnold_3I
Tue Oct 18, 2016 8:57 pm
Forum: Octet Exceptions
Topic: Octet Exception
Replies: 2
Views: 539

Re: Octet Exception

That makes sense, thank you!!
by Rebecca_Arnold_3I
Sun Oct 16, 2016 11:55 am
Forum: Octet Exceptions
Topic: Octet Exception
Replies: 2
Views: 539

Octet Exception

In my high school chemistry class, I learned that, along with H, He, Li, and Be, Boron also had an octet exception. I remember that it can have 6 ve-, but I don't understand why this is the case. Why would Boron be happier with 6ve- and not either 2ve-(like H, He, Li, Be) or 8ve-(complying with the ...
by Rebecca_Arnold_3I
Mon Oct 03, 2016 1:29 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Balmer Series vs. Lyman Series
Replies: 3
Views: 11083

Re: Balmer Series vs. Lyman Series

Thank you, this was very helpful!
by Rebecca_Arnold_3I
Sun Oct 02, 2016 11:53 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Balmer Series vs. Lyman Series
Replies: 3
Views: 11083

Balmer Series vs. Lyman Series

I'm a little confused about the difference between the Balmer and Lyman Series. I know that they both apply to the Hydrogen atom and that the Balmer series is for the visible region whereas the Lyman series is for the UV region. Is this the only difference between them?
Thank you so much!

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