Search found 32 matches

by Nicole Jakiel 4F
Fri Dec 07, 2018 11:59 pm
Forum: Naming
Topic: Oxidation Number
Replies: 2
Views: 57

Oxidation Number

How do you find the oxidation number when naming coordination compounds?
by Nicole Jakiel 4F
Fri Dec 07, 2018 11:45 pm
Forum: Amphoteric Compounds
Topic: Amphiprotic vs. Amphoteric
Replies: 7
Views: 321

Amphiprotic vs. Amphoteric

What is the difference between amphiprotic and amphoteric, and how do you determine if something is amphiprotic or amphoteric?
by Nicole Jakiel 4F
Fri Dec 07, 2018 11:38 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentates
Replies: 1
Views: 47

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?
by Nicole Jakiel 4F
Sun Dec 02, 2018 2:08 pm
Forum: Naming
Topic: How to name
Replies: 6
Views: 181

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.
by Nicole Jakiel 4F
Sun Dec 02, 2018 1:58 pm
Forum: Naming
Topic: naming coordination compounds for the final
Replies: 3
Views: 94

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.
by Nicole Jakiel 4F
Sun Dec 02, 2018 1:54 pm
Forum: Amphoteric Compounds
Topic: Amphoteric Compounds
Replies: 5
Views: 149

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?
by Nicole Jakiel 4F
Sun Dec 02, 2018 1:46 pm
Forum: Lewis Acids & Bases
Topic: Identifying Acids and Bases
Replies: 5
Views: 164

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?
by Nicole Jakiel 4F
Sun Nov 25, 2018 4:08 pm
Forum: Hybridization
Topic: Hybridization
Replies: 5
Views: 126

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?
by Nicole Jakiel 4F
Sun Nov 25, 2018 4:01 pm
Forum: Hybridization
Topic: Hybridization and Hybrid Orbitals
Replies: 4
Views: 103

Re: Hybridization and Hybrid Orbitals

I believe they are the same thing.
by Nicole Jakiel 4F
Sun Nov 25, 2018 3:55 pm
Forum: Hybridization
Topic: Bonds
Replies: 2
Views: 78

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?
by Nicole Jakiel 4F
Sun Nov 18, 2018 4:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angular vs Bent
Replies: 4
Views: 106

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.
by Nicole Jakiel 4F
Sun Nov 18, 2018 4:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Square Planar vs Tetrahedral
Replies: 8
Views: 212

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
by Nicole Jakiel 4F
Sun Nov 18, 2018 4:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Determining Shape
Replies: 10
Views: 248

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!
by Nicole Jakiel 4F
Fri Nov 02, 2018 6:25 pm
Forum: Octet Exceptions
Topic: Number of Unpaired Electrons
Replies: 2
Views: 108

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).
by Nicole Jakiel 4F
Fri Nov 02, 2018 6:18 pm
Forum: Ionic & Covalent Bonds
Topic: Writing Chemical Formulas
Replies: 1
Views: 57

Writing Chemical Formulas

Can anyone explain why the chemical formula for aluminum hydride is AlH3?
by Nicole Jakiel 4F
Fri Nov 02, 2018 6:09 pm
Forum: Lewis Structures
Topic: Double Bonds In Lewis Structures
Replies: 2
Views: 183

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?
by Nicole Jakiel 4F
Sun Oct 28, 2018 6:36 pm
Forum: Electronegativity
Topic: electronegativity chart
Replies: 11
Views: 683

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.
by Nicole Jakiel 4F
Sun Oct 28, 2018 6:28 pm
Forum: Lewis Structures
Topic: octets
Replies: 13
Views: 267

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.
by Nicole Jakiel 4F
Sun Oct 28, 2018 6:21 pm
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 8
Views: 113

Re: Lewis Structures

One dot = one valence electron
If an atom has four valence electrons, then four dots are drawn around the symbol!
by Nicole Jakiel 4F
Sat Oct 20, 2018 11:26 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Indeterminacy Equation
Replies: 1
Views: 42

Heisenberg Indeterminacy Equation

Can anyone clarify what the Heisenberg Indeterminacy Equation actually tells us?
by Nicole Jakiel 4F
Sat Oct 20, 2018 11:16 am
Forum: *Shrodinger Equation
Topic: Using the Schrodinger Equation
Replies: 3
Views: 321

Using the Schrodinger Equation

Can anyone clarify when we would use the Schrodinger equation?
by Nicole Jakiel 4F
Sat Oct 20, 2018 11:08 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Effective Nuclear Charge
Replies: 2
Views: 54

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...
by Nicole Jakiel 4F
Sat Oct 13, 2018 2:21 pm
Forum: DeBroglie Equation
Topic: Measurable wave length properties
Replies: 3
Views: 83

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.
by Nicole Jakiel 4F
Sat Oct 13, 2018 2:16 pm
Forum: *Black Body Radiation
Topic: Importance of Black Bodies?
Replies: 3
Views: 360

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.
by Nicole Jakiel 4F
Sat Oct 13, 2018 2:12 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelike properties
Replies: 7
Views: 84

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.
by Nicole Jakiel 4F
Sat Oct 13, 2018 2:12 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Wavelike properties
Replies: 7
Views: 84

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.
by Nicole Jakiel 4F
Thu Oct 04, 2018 11:00 am
Forum: Balancing Chemical Reactions
Topic: States of Matter
Replies: 11
Views: 380

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?
by Nicole Jakiel 4F
Thu Oct 04, 2018 10:52 am
Forum: Empirical & Molecular Formulas
Topic: Converting from Molecular to Empirical Formulas
Replies: 2
Views: 113

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...
by Nicole Jakiel 4F
Thu Oct 04, 2018 10:33 am
Forum: Empirical & Molecular Formulas
Topic: Empirical Formula
Replies: 6
Views: 121

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...

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