Search found 22 matches

by Jordan Foster
Thu Dec 07, 2017 4:35 pm
Forum: Amphoteric Compounds
Topic: Amphiprotic compounds
Replies: 3
Views: 303

Re: Amphiprotic compounds

Amphiprotic compounds are generally made with an element that is a metalloid. Similar to how a metalloid can act like a metal or a nonmetal, compounds that are amphiprotic can act as an acid or a base depending on the overall environment.
by Jordan Foster
Thu Dec 07, 2017 4:32 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of Acids and Bases [ENDORSED]
Replies: 5
Views: 314

Re: Strength of Acids and Bases [ENDORSED]

Anything that makes Hydrogen easier to remove will make for a stronger acid. More oxygen atoms pull electrons away from the hydrogen, which makes it easier to remove the hydrogen.
by Jordan Foster
Wed Nov 29, 2017 5:34 pm
Forum: Ideal Gases
Topic: Reverse Reaction, Q and K
Replies: 5
Views: 397

Re: Reverse Reaction, Q and K

Q will eventually reach the value of K, but Q is just a K value before it reaches equilibrium. Q is like a snapshot of how close the ratios are to equilibrium at a point in time.
by Jordan Foster
Wed Nov 29, 2017 5:31 pm
Forum: Ideal Gases
Topic: Chemical equilibrium [ENDORSED]
Replies: 9
Views: 686

Re: Chemical equilibrium [ENDORSED]

It is possible for it to change because factors like temperature, pressure, or adding or removing a substance can change the rates of the reaction.
by Jordan Foster
Mon Nov 20, 2017 10:24 pm
Forum: Ideal Gases
Topic: Chemical Equilibrium
Replies: 3
Views: 272

Re: Chemical Equilibrium

Chemical equilibrium can work with matter in all states. However, when calculating various concentrations, only gasses and aqueous matter are considered.
by Jordan Foster
Mon Nov 20, 2017 10:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium
Replies: 3
Views: 273

Re: Equilibrium

The only states that need to be included in the equations are the gas and aqueous states. Solids and liquids are equal to 1 so they do not have an impact on the calculations.
by Jordan Foster
Mon Nov 20, 2017 10:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K=1 [ENDORSED]
Replies: 2
Views: 101

Re: K=1 [ENDORSED]

The main time this can really happen is if the same types of atoms are reacting with each other. Otherwise, atoms and molecules will commonly have different rates of reaction, so k will hardly ever be 1.
by Jordan Foster
Mon Nov 20, 2017 10:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Reaction arrows
Replies: 3
Views: 143

Re: Reaction arrows

The arrows incorporate the idea of equilibrium, meaning that the reaction flows in both directions constantly. The goal behind equilibrium is to see how much reactants and products are being used, and how at what rate they are reacting.
by Jordan Foster
Fri Nov 17, 2017 10:22 pm
Forum: Hybridization
Topic: Hybridization
Replies: 6
Views: 233

Re: Hybridization

The reason we talk about hybridization is because the Lewis Structures are only accurate to a certain extent. There are many structures for which Lewis Structures do not work or make sense, which is where hybridization comes into play. Hybridization is a more detailed, yet more accurate version of e...
by Jordan Foster
Fri Nov 17, 2017 10:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angle
Replies: 7
Views: 254

Re: Bond Angle

The best way to know about bond angles is to simply memorize which bond angles go with which shapes. Once you have those down, you will always know that a lone pair is going to decrease bond angles, but you do not need to know by exactly how much. The only way to know the exact angles is through exp...
by Jordan Foster
Tue Nov 07, 2017 5:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 3D shape Lewis Diagrams
Replies: 4
Views: 217

Re: 3D shape Lewis Diagrams

It seems like the best way to go about it for me is to just memorize all of the shapes and their respective bond angles, but just continue to draw the 2d Lewis structures. Just be able to recognize the patterns of relationships behind the 2d models and their 3d shapes.
by Jordan Foster
Tue Nov 07, 2017 5:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shapes
Replies: 2
Views: 120

Re: Shapes

Lone pairs of electrons on a central atom will always change the shape of the molecule. Always watch for lone pairs because the overall shape and the bond angles will be altered.
by Jordan Foster
Tue Nov 07, 2017 5:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: electron density
Replies: 3
Views: 134

Re: electron density

Electron density is also related to electronegativity. In a molecule containing several different atoms, the atom that is the most electronegative will tend to have a high electron density.
by Jordan Foster
Tue Nov 07, 2017 5:02 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Delta Positive / Negative
Replies: 3
Views: 623

Re: Delta Positive / Negative

Although covalent bonds are thought of as shared electrons, the sharing is almost always unequal. The atom that is more electronegative is going to attract the electrons for more time than the less electronegative atom.
by Jordan Foster
Sun Oct 29, 2017 9:50 pm
Forum: Ionic & Covalent Bonds
Topic: Noble Gases
Replies: 6
Views: 366

Re: Noble Gases

The reason that noble gasses are hardly reactant is because they are already in the ideal form with a full valence shell. Although noble gasses can react in extreme conditions, for the most part other elements are trying to form bonds to resemble the formation of a noble gas.
by Jordan Foster
Sun Oct 29, 2017 9:47 pm
Forum: Ionic & Covalent Bonds
Topic: Study Habits [ENDORSED]
Replies: 8
Views: 407

Re: Study Habits [ENDORSED]

I like to watch crash course and Khan academy as well. As far as other study habits, I like to run through one part of a homework problem, like part a, and then check my answer. If I am correct I continue on to the other parts to reinforce good habits. If I am incorrect, I either read the explanatio...
by Jordan Foster
Sun Oct 22, 2017 11:26 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: XYZ [ENDORSED]
Replies: 4
Views: 214

Re: XYZ [ENDORSED]

XYZ just represents that there are three pairs of electrons in each shell. Using the XYZ just makes it more clear that the electrons come in pairs rather than a group of six, even though there are six overall in the shell.
by Jordan Foster
Sun Oct 22, 2017 11:22 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Px, Py, Pz
Replies: 10
Views: 447

Re: Px, Py, Pz

We are allowed to write it as 2P^3 and receive the same amount of credit. The other way he was explaining is more conceptual and gives a more detailed way of explaining the organization of the electrons. However, both ways are equally effective.
by Jordan Foster
Fri Oct 13, 2017 6:09 pm
Forum: Properties of Electrons
Topic: Converting Between keV and Joules
Replies: 3
Views: 428

Re: Converting Between keV and Joules

Dr. Lavelle also mentioned that we do not need to memorize the conversions for units like KeW to J. We will be given conversion equations on a sheet of constants and equations so as long as you know how to use and manipulate the equations, you will be fine.
by Jordan Foster
Fri Oct 13, 2017 6:05 pm
Forum: *Black Body Radiation
Topic: Blackbody
Replies: 2
Views: 248

Re: Blackbody

There are no known examples of a true Blackbody. They are just used to study light and energy because they absorb all frequencies of light and convert it proportionally to heat.
by Jordan Foster
Tue Oct 03, 2017 4:41 pm
Forum: Balancing Chemical Reactions
Topic: Combustion Question
Replies: 9
Views: 444

Re: Combustion Question

Combustion reactions can have any number of products, depending on the reactants. The two products that are present in every combustion reaction are CO2 and H2O.
by Jordan Foster
Tue Oct 03, 2017 4:36 pm
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant- Excess
Replies: 4
Views: 193

Re: Limiting Reactant- Excess

The limiting reactant is the reactant that will run out first. This means there will be excess of the other reactant, making it the non limiting reactant. Most calculations will be based off of the limiting reactant because the excess of the non limiting reactant will not be used.

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