Search found 20 matches

by Nick Foucrier 3J
Fri Mar 17, 2017 2:49 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Axial/Equatorial
Replies: 2
Views: 314

Re: Axial/Equatorial

You can start on any corner. For the chair conformation in particular, there will always be one corner pointing up and one corner pointing down. On the corner pointing up draw an axial up bond and on the corner pointing down draw an axial down bond. From there, just alternate axial up/down on each s...
by Nick Foucrier 3J
Fri Mar 17, 2017 2:46 pm
Forum: *ChemDraw
Topic: Drawing Newman Projections
Replies: 2
Views: 830

Re: Drawing Newman Projections

Just know how to draw the newman projections for the molecules talked about in lecture. So, just worry about drawing the newman projection for Ethane (including different substituents on ethane and how the different substituents affect the total energy of the molecule depending on the conformation).
by Nick Foucrier 3J
Sat Mar 04, 2017 2:01 pm
Forum: *Alkanes
Topic: Neobutane vs. tetra-butane
Replies: 1
Views: 312

Re: Neobutane vs. tetra-butane

Neo is used only when there are 5 or more carbons. Butane only has 4 carbons so Neo is therefore inapplicable.
by Nick Foucrier 3J
Sat Mar 04, 2017 1:56 pm
Forum: *Cycloalkanes
Topic: Numbering of Substituents [ENDORSED]
Replies: 8
Views: 1877

Re: Numbering of Substituents [ENDORSED]

For naming/numbering substituents, you start by first listing all the substituents by name. Then you write them in alphabetical order. After listed in alphabetical order, you then proceed to number them. So, the numbers do not have to be in a particular order per se, unless they have the same name, ...
by Nick Foucrier 3J
Sat Mar 04, 2017 1:50 pm
Forum: *Alkanes
Topic: Order in naming [ENDORSED]
Replies: 2
Views: 399

Re: Order in naming [ENDORSED]

When naming the strands, disregard the prefix that states how many there are. For example, in dimethyl, ignore the di and start naming it alphabetically with the m in methyl.
by Nick Foucrier 3J
Tue Feb 14, 2017 8:58 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Practice Midterm 2016 #8
Replies: 1
Views: 239

Practice Midterm 2016 #8

#8 on the 2016 practice midterm states: A standard electrochemical cell is made by placing a silver electrode into a 1.0M Ag+ solution and a cadmium electrode into a 1.0M Cd2+ solution. From this question, how can we tell which element is involved in the oxidation and which is involved in the reduct...
by Nick Foucrier 3J
Thu Feb 02, 2017 2:09 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Battery Cell
Replies: 1
Views: 292

Battery Cell

Hey, so in lecture Dr. Lavelle drew the illustration for a battery several times, the one with the oxidation and reduction interactions. I understand the model except for the salt bridge. What is the purpose of having a salt bridge connect the anode and cathode?
by Nick Foucrier 3J
Sat Jan 28, 2017 7:39 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal
Replies: 1
Views: 312

Isothermal

So I know that isothermal means that the temperature of the system does not change (ΔT=0). Why does isothermal also imply that ΔU=0?
by Nick Foucrier 3J
Thu Jan 19, 2017 9:00 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated System Container
Replies: 1
Views: 288

Re: Isolated System Container

Yes, the volume of an isolated container can change. The first law of thermodynamics gives us that the internal energy of an isolated system is constant. Thus, deltaU=q+w=0, giving us q=w. Therefore, volume can vary but it must be accompanied by an increase of heat within the system.
by Nick Foucrier 3J
Fri Jan 13, 2017 9:38 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calculating Heat Required
Replies: 3
Views: 496

Calculating Heat Required

On page 19 in the course reader, we are given a formula such that Qp=n*Cp*change in temperature. Written on the board was the formula Q=(mass)*Csp*change in temperature. I am confused as to what the difference between these equations are and when to use each one. Please help!
by Nick Foucrier 3J
Thu Dec 01, 2016 8:43 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted and Lewis Differences
Replies: 1
Views: 321

Re: Bronsted and Lewis Differences

Every Bronsted base is a lewis base, and every Bronsted acid is a Lewis acid. However, not every Lewis acid/base is a Bronsted acid/base. An example is carbon monoxide which is a Lewis base in some reactions with metals, but not a Bronsted base because it does not donate a hydrogen. (Chapter 12.2 Ch...
by Nick Foucrier 3J
Tue Nov 22, 2016 11:31 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Keeping Equilibrium with Pressure
Replies: 2
Views: 412

Keeping Equilibrium with Pressure

For a reaction, if the pressure of one reactant went up, how would you keep the reaction in equilibrium?
by Nick Foucrier 3J
Tue Nov 22, 2016 11:26 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Making Assumptions for weak acids
Replies: 1
Views: 283

Re: Making Assumptions for weak acids

We can assume that the denominator is just .1 because in a weak acid there is a small Ka, so X is going to be a very small number. If X is less than 5% of the initial value then it is okay to use this approximation. (See page 156 of course reader).
by Nick Foucrier 3J
Thu Nov 17, 2016 2:14 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Naming Question and Coord. # for Nitrito
Replies: 3
Views: 457

Re: Naming Question and Coord. # for Nitrito

When you go from name to formula, the metal comes first. As for the order of the ligands, it doesn't matter. Personally, I just place the ligands in alphabetical order after the metal because it's easiest.
Nitrito is actually considered monodente.
by Nick Foucrier 3J
Thu Nov 10, 2016 3:09 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: QUIZ 3
Replies: 2
Views: 403

Re: QUIZ 3

Yes, quiz three covers molecular orbital theory, coordination compounds, and some of equilibrium. I would expect that we will have to draw a few MO diagrams.
by Nick Foucrier 3J
Mon Oct 31, 2016 9:26 pm
Forum: Administrative Questions and Class Announcements
Topic: MO Diagrams on Midterm?
Replies: 2
Views: 478

Re: MO Diagrams on Midterm?

The midterm includes all topics up to page 105 in the course reader (the end of hybridization).
by Nick Foucrier 3J
Wed Oct 26, 2016 3:00 pm
Forum: Sigma & Pi Bonds
Topic: Hybridization question
Replies: 1
Views: 320

Re: Hybridization question

Hydrogen has electrons that only exist in the 1s shell.
by Nick Foucrier 3J
Tue Oct 18, 2016 3:21 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity [ENDORSED]
Replies: 3
Views: 556

Re: Electron Affinity [ENDORSED]

For the general trend on the periodic table:
Electron Affinity increases as you moved from left to right
Electron Affinity decreases as you move from top to bottom
by Nick Foucrier 3J
Mon Oct 10, 2016 10:02 am
Forum: *Black Body Radiation
Topic: Examples of Black Body Radiation
Replies: 4
Views: 2888

Re: Examples of Black Body Radiation

A black body absorbs all the EM radiation (light) that contacts it. To stay in thermal equilibrium, it must also emit radiation at the same rate as it absorbs (black body radiation).
by Nick Foucrier 3J
Wed Sep 28, 2016 10:54 pm
Forum: Student Social/Study Group
Topic: Hedrick Summit Study Group Chem 14A
Replies: 29
Views: 2830

Re: Hedrick Summit Study Group Chem 14A

Hey! I'm in Hedrick Summit as well. COUNT ME IN!!

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