Search found 38 matches

by Kimberly Wagas 1H
Sun Mar 13, 2016 1:26 pm
Forum: *Alcohols
Topic: Numbering Final 9B
Replies: 1
Views: 269

Numbering Final 9B

In the second molecule of the 2015 Final 9B, they numbered the molecule starting with the cyclo-substituents and said propan-2-ol. Shouldn't the numbering start with the alcohol since it is the functional group and therefore has higher priority so that it should be ...propan-1-ol?
by Kimberly Wagas 1H
Sat Mar 12, 2016 9:48 pm
Forum: *Cycloalkenes
Topic: Z/E for cycloalkenes
Replies: 1
Views: 285

Z/E for cycloalkenes

For 7A on the 2011 final, it names the structure as E? How do you determine priority for deciding Z/E for cycloalkenes?
by Kimberly Wagas 1H
Sat Mar 12, 2016 6:47 pm
Forum: Administrative Questions and Class Announcements
Topic: Winter 2016 Final Exam Review and Information
Replies: 25
Views: 16484

Re: Winter 2016 Final Exam Review and Information

Are we expected to memorize the energy differences or the bond angles for the different conformations?
by Kimberly Wagas 1H
Fri Mar 11, 2016 8:06 pm
Forum: *Alkenes
Topic: Priority
Replies: 1
Views: 280

Priority

I read online that according to IUPAC double bonds have higher priority than triple bonds for numbering the longest carbon chain, but most TAs and UAs I have talked to have said that they have equal priority and to pick the numbering scheme that'll give you the lowest numbers so the triple bond can ...
by Kimberly Wagas 1H
Sat Mar 05, 2016 8:36 pm
Forum: *Cycloalkenes
Topic: Benzyl vs Phenyl
Replies: 1
Views: 493

Benzyl vs Phenyl

What is the difference between benzyl and phenyl?
by Kimberly Wagas 1H
Sat Mar 05, 2016 6:18 pm
Forum: *Haloalkenes
Topic: Numbering Priority
Replies: 1
Views: 473

Numbering Priority

In an example in the textbook, the alkyl substituent was given the lower number than the halide. Why does iodo not get the lower number if halides have higher priority over alkyl substituents?
by Kimberly Wagas 1H
Mon Feb 29, 2016 12:45 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Geometric Isomers with multiple double bonds
Replies: 1
Views: 904

Geometric Isomers with multiple double bonds

In page 17 of the Intro to Organic Chemistry textbook, there are two examples of geometric isomers with multiple double bonds? Which double bond do you consider when deciding if an isomer is cis or trans?
by Kimberly Wagas 1H
Mon Feb 29, 2016 10:01 am
Forum: *Nucleophiles
Topic: Alkyl and Aryl Carbanions
Replies: 3
Views: 533

Alkyl and Aryl Carbanions

What is the difference between alkyl carbanions and aryl carbanions?
by Kimberly Wagas 1H
Mon Feb 29, 2016 9:55 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2016
Replies: 48
Views: 18764

Re: Quiz 3 Winter 2016

Will we have to know alkyl and aryl carbanions for the quiz?
by Kimberly Wagas 1H
Fri Feb 26, 2016 3:17 pm
Forum: *Cycloalkanes
Topic: 3-ethyl-1,1-dimethyl-2-propylcyclohexane
Replies: 1
Views: 349

3-ethyl-1,1-dimethyl-2-propylcyclohexane

In page 21 of the organic chemistry textbook, it names the structure 3-ethyl-1,1-dimethyl-2-propylcyclohexane and also notes that the common incorrect name is 1-ethyl-3,3-dimethyl-2-propylcyclohexane. In a previous page, it states that if the numbering schemes contain equivalent numbers, you assign ...
by Kimberly Wagas 1H
Fri Feb 26, 2016 12:48 pm
Forum: *Alkanes
Topic: Structural Formula parentheses
Replies: 2
Views: 359

Re: Structural Formula parentheses

Structural formulas do not have a fixed convention, and in the end, nobody uses them for anything more complicated than basic hydrocarbons because they quickly get very confusing. Parentheses can be used to signify repetition of a group, branching off, or just multiple copies of a branch. I would s...
by Kimberly Wagas 1H
Fri Feb 26, 2016 12:32 pm
Forum: *Alkanes
Topic: polarizability/nucleophiles
Replies: 2
Views: 1092

Re: polarizability/nucleophiles

Stronger nucleophiles have higher polarizability. Br has a greater atomic radius compared to F, so the distance between its electrons and nuclear charge is greater. The greater the distance of electrons from nuclear charge, the less control the nuclear charge has on the charge distribution, and thus...
by Kimberly Wagas 1H
Thu Feb 25, 2016 9:18 pm
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: Equivalent H
Replies: 2
Views: 429

Equivalent H

What are equivalent hydrogens and what is its significance in organic compounds? What exactly does it mean when "hydrogens are in the same chemical environment"?
by Kimberly Wagas 1H
Mon Feb 22, 2016 9:40 pm
Forum: *Alkanes
Topic: Common Names for Alkanes
Replies: 1
Views: 378

Common Names for Alkanes

Are we expected to know the common names for alkanes in addition to the IUPAC name for this class?
by Kimberly Wagas 1H
Mon Feb 15, 2016 8:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2016
Replies: 18
Views: 6995

Re: Quiz 2 Winter 2016

Do we need to know how to do the steady state approach for the quiz?
by Kimberly Wagas 1H
Tue Feb 09, 2016 2:59 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Concentration Cell
Replies: 1
Views: 409

Concentration Cell

Would a concentration cell be considered a galvanic cell or an electrolytic cell and why?
by Kimberly Wagas 1H
Mon Feb 08, 2016 12:36 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Electrolysis
Replies: 1
Views: 324

Electrolysis

What types of problems and calculations could we be asked regarding electrolysis for the midterm? Or should we just know the concept behind electrolysis?
by Kimberly Wagas 1H
Mon Feb 08, 2016 12:15 pm
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: Electrolysis
Replies: 1
Views: 322

Electrolysis

What types of problems and calculations could we be asked regarding electrolysis for the midterm? Or should we just know the concept behind electrolysis?
by Kimberly Wagas 1H
Sat Feb 06, 2016 9:34 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Arrange in order of increasing standard molar entropy
Replies: 3
Views: 4993

Re: Arrange in order of increasing standard molar entropy

Just to clarify, so for this question since the molecules are all in a gas phase and tetrahedral, are we supposed to think of entropy in terms of bond vibrations and mass as opposed to number of arrangements/positions of the atoms as you would with residual entropy?
by Kimberly Wagas 1H
Mon Feb 01, 2016 10:34 pm
Forum: Balancing Redox Reactions
Topic: Identifying Oxidizing Agent and Reducing Agent
Replies: 3
Views: 374

Identifying Oxidizing Agent and Reducing Agent

How do you identify the oxidizing agent and the reducing agent in a reaction?
by Kimberly Wagas 1H
Fri Jan 29, 2016 2:33 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Electromotive Force
Replies: 1
Views: 261

Electromotive Force

What is the electromotive force? Why does it represent the maximum potential difference?
by Kimberly Wagas 1H
Fri Jan 22, 2016 8:23 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Ideal Gas in the Context of the Problem
Replies: 1
Views: 223

Ideal Gas in the Context of the Problem

When a question states assume "ideal gas behavior," what information/properties does this indicate?
by Kimberly Wagas 1H
Wed Jan 20, 2016 8:33 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Microstates, W, for a molecule
Replies: 1
Views: 249

Microstates, W, for a molecule

How do you determine W, the number of microstates, for a molecule such as bromobenzene ()?
by Kimberly Wagas 1H
Tue Jan 19, 2016 11:00 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Equations used in Homework 8.25
Replies: 1
Views: 272

Re: Equations used in Homework 8.25

The equation C=q/ \Delta T comes from the heat capacity equation q=C \Delta T, so they just isolated C by dividing by \Delta T. The given information of liters and molarities is meant to show that the calorimeter is at constant volume which indicates that no work is being done (w=-P \Delta V=0 when ...
by Kimberly Wagas 1H
Tue Jan 12, 2016 3:38 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Work in Reversible Process vs Work in Irreversible Process
Replies: 3
Views: 627

Work in Reversible Process vs Work in Irreversible Process

The textbook states that "Provided the initial and final states are the same, a change carried out reversibly always does more work than a change carried out irreversibly"?

Why is the amount of work a system can do greater in reversible processes as opposed to in irreversible processes?
by Kimberly Wagas 1H
Thu Jan 07, 2016 12:07 pm
Forum: Phase Changes & Related Calculations
Topic: kJ vs kJ/mol
Replies: 1
Views: 2185

kJ vs kJ/mol

When would you use kJ or kJ/mol?
by Kimberly Wagas 1H
Sat Dec 05, 2015 11:47 pm
Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
Topic: Titration
Replies: 1
Views: 311

Titration

Are we expected to know how to solve for the pH after the equivalence point?
by Kimberly Wagas 1H
Tue Nov 17, 2015 11:38 pm
Forum: Naming
Topic: Polydentate Ligand Naming
Replies: 1
Views: 324

Polydentate Ligand Naming

When naming coordination compounds, the course reader says that if a ligand is polydentate, then use the prefix bis-, tris-, etc. However, I came across some examples that included carbonato (which can be mono- or polydentate) and they did not use bis...etc. I'm assuming that it is because it is mon...
by Kimberly Wagas 1H
Sun Nov 15, 2015 1:48 pm
Forum: Naming
Topic: Naming Complex Anions
Replies: 1
Views: 268

Naming Complex Anions

For complexes with an overall negative net charge, are we expected to know the Greek/Latin name of the element when naming the transition metal on the quiz? Ex) [CuCl4]2- Would we have to know it is tetrachlorocuprate(II) ion or is tetrachlorocopper(II) acceptable? Because on one of the practice qui...
by Kimberly Wagas 1H
Tue Nov 10, 2015 10:57 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Determining if a Ligand is Polydentate
Replies: 6
Views: 885

Determining if a Ligand is Polydentate

How do you determine if a ligand is polydentate? Also, how do you determine the maximum number of places on the ligand that can bind simultaneously to a single metal center? Can you tell just by looking at the chemical formula by memorizing general trends about the ligands or do you draw out the lew...
by Kimberly Wagas 1H
Sun Nov 08, 2015 9:42 pm
Forum: Naming
Topic: naming Coordination compounds
Replies: 3
Views: 713

Re: naming Coordination compounds

I made a video on how to find the oxidation state of a metal in a coordination compound

[youtube]https://youtu.be/LaYZUJzbLkE[/youtube]
by Kimberly Wagas 1H
Sat Nov 07, 2015 10:54 pm
Forum: Naming
Topic: naming Coordination compounds
Replies: 3
Views: 713

Re: naming Coordination compounds

In order to find the oxidation number of the transition metal, you have to take into account the charge of the ligands and the overall net charge of the entire compound. The oxidation number of the transition metal and the charge of the ligands should add up to the net charge. Ex) Determine the oxid...
by Kimberly Wagas 1H
Mon Nov 02, 2015 5:32 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Electromagnetic Radiation
Replies: 1
Views: 370

Electromagnetic Radiation

What is the range for the wavelength in nm of electromagnetic radiation for ultraviolet, visible light, and infrared? Do we have to know the range for x Rays, y Rays, microwaves, and radio waves for the midterm?
by Kimberly Wagas 1H
Wed Oct 28, 2015 12:44 am
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polar or Nonpolar Molecules [ENDORSED]
Replies: 2
Views: 416

Polar or Nonpolar Molecules [ENDORSED]

How do you determine if a molecule is polar or nonpolar?
by Kimberly Wagas 1H
Tue Oct 27, 2015 10:57 pm
Forum: Lewis Acids & Bases
Topic: Determining Lewis Acid or Base
Replies: 1
Views: 323

Determining Lewis Acid or Base

How do you determine if a molecule is a Lewis acid or base in a reaction?
by Kimberly Wagas 1H
Fri Oct 23, 2015 9:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sigma bonds and Pi Bonds
Replies: 8
Views: 599

Re: Sigma bonds and Pi Bonds

The textbook discusses how the greater the extent of orbital overlap, the stronger the bond. Can someone explain why?
by Kimberly Wagas 1H
Wed Oct 07, 2015 5:13 pm
Forum: Significant Figures
Topic: How many sf to carry through in problems with multiple parts
Replies: 5
Views: 780

Re: How many sf to carry through in problems with multiple p

Just to clarify, hypothetically, if part A was a problem with multiple steps of calculations within that one problem would you use use significant figures in each step or only at the end with your final answer?
by Kimberly Wagas 1H
Thu Oct 01, 2015 4:33 pm
Forum: Properties of Light
Topic: Rydberg Formula
Replies: 7
Views: 1661

Re: Rydberg Formula

Can the Rydberg formula only be used for transitions between energy levels of a single hydrogen atom with only one electron? If so, are we expected to know how to calculate the wavelength of light for atoms with multiple electrons?

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