Search found 32 matches
- Fri Dec 07, 2018 11:59 pm
- Forum: Naming
- Topic: Oxidation Number
- Replies: 2
- Views: 287
Oxidation Number
How do you find the oxidation number when naming coordination compounds?
- Fri Dec 07, 2018 11:45 pm
- Forum: Amphoteric Compounds
- Topic: Amphiprotic vs. Amphoteric
- Replies: 7
- Views: 983
Amphiprotic vs. Amphoteric
What is the difference between amphiprotic and amphoteric, and how do you determine if something is amphiprotic or amphoteric?
- Fri Dec 07, 2018 11:38 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentates
- Replies: 1
- Views: 242
Polydentates
Can anyone clarify how to determine if a ligand is a polydentate, and how to determine what kind of polydentate it is? For example, how can you tell if it is a tetradentate?
- Sun Dec 02, 2018 2:08 pm
- Forum: Naming
- Topic: How to name
- Replies: 6
- Views: 634
Re: How to name
The lecture notes say that when naming coordinate compounds, ligand names are alphabetical order and then the transition metal cation name is written after the ligand name.
- Sun Dec 02, 2018 1:58 pm
- Forum: Naming
- Topic: naming coordination compounds for the final
- Replies: 3
- Views: 409
Re: naming coordination compounds for the final
I believe we will be expected to know how to use anything covered in the lecture notes - we went over the rules of naming coordinate compounds so it is probably best to know these rules and be able to use them.
- Sun Dec 02, 2018 1:54 pm
- Forum: Amphoteric Compounds
- Topic: Amphoteric Compounds
- Replies: 5
- Views: 513
Amphoteric Compounds
Can anyone clarify how do we identify amphoteric compounds? For example, is there any specific way to tell by looking at the compound's structure?
- Sun Dec 02, 2018 1:46 pm
- Forum: Lewis Acids & Bases
- Topic: Identifying Acids and Bases
- Replies: 5
- Views: 749
Identifying Acids and Bases
I know that whenever there is a compound with a nitrogen that has a lone pair it can be identified as a base, but is there any characteristic like this that allows us to identify acids based on the compound's structure?
- Sun Nov 25, 2018 4:08 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 5
- Views: 575
Hybridization
In terms of hybridization, will we only need to figure out which hybridization will work? In other words, will we only need to find which hybridization will match the VSEPR model?
- Sun Nov 25, 2018 4:01 pm
- Forum: Hybridization
- Topic: Hybridization and Hybrid Orbitals
- Replies: 4
- Views: 551
Re: Hybridization and Hybrid Orbitals
I believe they are the same thing.
- Sun Nov 25, 2018 3:55 pm
- Forum: Hybridization
- Topic: Bonds
- Replies: 2
- Views: 342
Bonds
How do we know which type of bond is present? In other words, how do we know when there is a pi bond or when there is a sigma bond?
- Sun Nov 18, 2018 4:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Angular vs Bent
- Replies: 4
- Views: 495
Re: Angular vs Bent
From my understanding they are the same thing, so it does not matter which term you use as they are both correct.
- Sun Nov 18, 2018 4:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Square Planar vs Tetrahedral
- Replies: 8
- Views: 2443
Re: Square Planar vs Tetrahedral
According to the lecture notes:
Tetrahedral: the central atom has 4 bonding pairs
Square Planar: the central atom has 4 bonding pairs and 2 lone pairs
Tetrahedral: the central atom has 4 bonding pairs
Square Planar: the central atom has 4 bonding pairs and 2 lone pairs
- Sun Nov 18, 2018 4:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Shape
- Replies: 10
- Views: 975
Re: Determining Shape
For now I would really just draw the Lewis Structures every time- eventually you may begin to pick up on certain patterns but as of right now drawing the Lewis Structure first is the best way to go!
- Sun Nov 11, 2018 5:01 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Dipole Moment
- Replies: 2
- Views: 359
Dipole Moment
What are dipole moments, and how do you know when they occur?
- Sun Nov 11, 2018 4:57 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Calculating Dissociation Energy
- Replies: 3
- Views: 284
Calculating Dissociation Energy
How do you calculate dissociation energy?
- Sun Nov 11, 2018 4:50 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Polarizability vs. Polarizing Power
- Replies: 1
- Views: 206
Polarizability vs. Polarizing Power
What is the difference between polarizability and polarizing power?
- Fri Nov 02, 2018 6:25 pm
- Forum: Octet Exceptions
- Topic: Number of Unpaired Electrons
- Replies: 2
- Views: 474
Number of Unpaired Electrons
Can anyone explain why Ni^2+ has two unpaired electrons? I understand how to get its ground state electron configuration, [Ar]3d^8, but I don't understand why it has two unpaired electrons (instead of zero unpaired electrons).
- Fri Nov 02, 2018 6:18 pm
- Forum: Ionic & Covalent Bonds
- Topic: Writing Chemical Formulas
- Replies: 1
- Views: 229
Writing Chemical Formulas
Can anyone explain why the chemical formula for aluminum hydride is AlH3?
- Fri Nov 02, 2018 6:09 pm
- Forum: Lewis Structures
- Topic: Double Bonds In Lewis Structures
- Replies: 2
- Views: 1661
Double Bonds In Lewis Structures
When drawing Lewis Structures, how do we know if we need to draw a double bond, and how do you determine which element gets the double bond?
- Sun Oct 28, 2018 6:36 pm
- Forum: Electronegativity
- Topic: electronegativity chart
- Replies: 11
- Views: 1879
Re: electronegativity chart
The general trend that you need to remember is that electronegativity increases as you go up the periodic table and to the right! I believe this should be enough in order to figure out which elements are more electronegative than others.
- Sun Oct 28, 2018 6:28 pm
- Forum: Lewis Structures
- Topic: octets
- Replies: 13
- Views: 1121
Re: octets
A full octet has eight valence electrons in it, and yes, each orbital needs to have eight electrons in it before you can move to the next orbital.
- Sun Oct 28, 2018 6:21 pm
- Forum: Lewis Structures
- Topic: Lewis Structures
- Replies: 8
- Views: 694
Re: Lewis Structures
One dot = one valence electron
If an atom has four valence electrons, then four dots are drawn around the symbol!
If an atom has four valence electrons, then four dots are drawn around the symbol!
- Sat Oct 20, 2018 11:26 am
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenberg Indeterminacy Equation
- Replies: 1
- Views: 206
Heisenberg Indeterminacy Equation
Can anyone clarify what the Heisenberg Indeterminacy Equation actually tells us?
- Sat Oct 20, 2018 11:16 am
- Forum: *Shrodinger Equation
- Topic: Using the Schrodinger Equation
- Replies: 3
- Views: 678
Using the Schrodinger Equation
Can anyone clarify when we would use the Schrodinger equation?
- Sat Oct 20, 2018 11:08 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Effective Nuclear Charge
- Replies: 2
- Views: 291
Effective Nuclear Charge
During lecture one of the notes on the presentation stated, "Inner electrons shield outer electrons from electrostatic attraction of positive nucleus; outer electrons feel a reduced electrostatic attraction, results in an effective nuclear charge." Can anyone clarify what an effective nucl...
- Sat Oct 13, 2018 2:21 pm
- Forum: DeBroglie Equation
- Topic: Measurable wave length properties
- Replies: 3
- Views: 342
Re: Measurable wave length properties
You determine yes or no based on the numerical value you get after calculating the wavelength of the object. Extremely small numbers will not have wavelength properties as they are unlikely to be detected.
- Sat Oct 13, 2018 2:16 pm
- Forum: *Black Body Radiation
- Topic: Importance of Black Bodies?
- Replies: 3
- Views: 695
Re: Importance of Black Bodies?
We aren't going to be learning about them, as Dr. Lavelle mentioned that this is not something that we will be covering in the course material. He only mentioned it in class because he tends to get a lot of questions about it.
- Sat Oct 13, 2018 2:12 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelike properties
- Replies: 7
- Views: 454
Re: Wavelike properties
I think with a calculated value this small, you would say that it does not have any wavelike properties because a number this small is not going to be detectable.
- Sat Oct 13, 2018 2:12 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelike properties
- Replies: 7
- Views: 454
Re: Wavelike properties
I think with a calculated value this small, you would say that it does not have any wavelike properties because a number this small is not going to be detectable.
- Thu Oct 04, 2018 11:00 am
- Forum: Balancing Chemical Reactions
- Topic: States of Matter
- Replies: 11
- Views: 2183
Re: States of Matter
To add onto the first question, do we need to write the states of matter every time we balance a chemical reaction?
- Thu Oct 04, 2018 10:52 am
- Forum: Empirical & Molecular Formulas
- Topic: Converting from Molecular to Empirical Formulas
- Replies: 2
- Views: 440
Converting from Molecular to Empirical Formulas
When converting from molecular to empirical formulas, do we just have to simplify in order to get the smallest ratio? For example, one of the homework problems provides us with a diagram of a molecule and asks us to find the molecular and empirical formulas (F 25, sixth edition). Just by counting th...
- Thu Oct 04, 2018 10:33 am
- Forum: Empirical & Molecular Formulas
- Topic: Empirical Formula
- Replies: 6
- Views: 611
Re: Empirical Formula
I was wondering the same thing. When determining the empirical formula, I am pretty sure that we always assume/ imagine that the sample mass is 100 grams as this is the easiest way to convert the mass percentages into the mass (in grams). Can someone confirm if this is true for every problem where w...