Search found 52 matches

by Venus Hagan 3D
Sun Dec 08, 2019 12:20 am
Forum: Naming
Topic: cobalt
Replies: 4
Views: 13

Re: cobalt

if the complex (so the central atom and its ligands) has an overall negative charge then you add the ending -ate.
by Venus Hagan 3D
Sat Dec 07, 2019 10:24 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: -ido vs -o
Replies: 5
Views: 19

Re: -ido vs -o

The two different names are because there are two different sets of naming rules. The book uses one and Lavelle used another in class. I think either is fine.
by Venus Hagan 3D
Sat Dec 07, 2019 10:21 pm
Forum: Hybridization
Topic: Hybridization
Replies: 1
Views: 6

Re: Hybridization

I think so. If you have 2 regions of electron density it will always be sp, 3 regions is sp2, 4 regions is sp3, 5 regions is sp3d, and 6 regions is sp3d2.
by Venus Hagan 3D
Sat Dec 07, 2019 3:15 pm
Forum: Naming
Topic: Transition Metal Latin Names
Replies: 3
Views: 19

Re: Transition Metal Latin Names

I believe it is just iron and copper. They would be ferrate/ferrous and cuprous/cuprate.
by Venus Hagan 3D
Sat Dec 07, 2019 3:09 pm
Forum: Conjugate Acids & Bases
Topic: Strength
Replies: 2
Views: 11

Re: Strength

Stong acids have a weak conjugate base and strong bases have a weak conjugate acid,
by Venus Hagan 3D
Sat Dec 07, 2019 3:07 pm
Forum: Bronsted Acids & Bases
Topic: Main Difference
Replies: 4
Views: 15

Re: Main Difference

Bronstead acids and bases focus on what is happening with the protons. What is giving up and H+ and what is gaining an H+? Lewis acids and bases focus on the electron. What is giving up an electron and what is gaining an electron ?
by Venus Hagan 3D
Sat Dec 07, 2019 1:38 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand Charges
Replies: 3
Views: 15

Re: Ligand Charges

i honestly just memorized them. In the textbook, table 9C.1 is a list of the common ligands with their names, formulas, and charges
by Venus Hagan 3D
Sat Dec 07, 2019 1:30 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Equations
Replies: 5
Views: 11

Re: Equations

the equation sheets from the last test didn't have the formula for Ka but pH was on there
by Venus Hagan 3D
Thu Dec 05, 2019 9:59 pm
Forum: Naming
Topic: cobaltate
Replies: 1
Views: 14

Re: cobaltate

It will be cobaltate because the complex overall has a negative charge. The F6 gives it a -6 charge and the K3 is a plus 3 charge. That means for the entire coordination compound to be neutral then cobalt is a +3. Despite the cobalt itself having a positive charge, the complex or what's in brackets ...
by Venus Hagan 3D
Thu Dec 05, 2019 9:54 pm
Forum: Biological Examples
Topic: Coordination Number vs Oxidation State
Replies: 2
Views: 11

Re: Coordination Number vs Oxidation State

The coordination number is basically how many ligands are attached to the central atoms while the oxidation number is the charge of the transition metal.
by Venus Hagan 3D
Thu Dec 05, 2019 9:50 pm
Forum: Naming
Topic: Cyanido vs cyano
Replies: 5
Views: 21

Re: Cyanido vs cyano

i think technically both are right. I would stick with cyano because that's what Professor Lavelle used in class
by Venus Hagan 3D
Sun Dec 01, 2019 10:44 pm
Forum: Naming
Topic: Brackets in Chem. Formula
Replies: 5
Views: 23

Re: Brackets in Chem. Formula

The transition metal and all its ligand will be inside the brackets and then everything else is outside. If you are going from a name to the formula everything in the complex will be one word and then things outside will be another word.
by Venus Hagan 3D
Sun Dec 01, 2019 10:40 pm
Forum: Lewis Acids & Bases
Topic: Weak vs. Strong
Replies: 8
Views: 30

Re: Weak vs. Strong

Basically strong acids dissociate completely and become ions while for weak acids some of it will dissociate and some will remain as acid.
by Venus Hagan 3D
Sun Dec 01, 2019 10:35 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Equilibrium constants
Replies: 3
Views: 12

Re: Equilibrium constants

the formula for kA = [A-][H+] / [AH]. i dont think we need to solve for it in this class but its good to know what it is and what it means
by Venus Hagan 3D
Sun Dec 01, 2019 10:29 pm
Forum: Naming
Topic: How to name iron in a TM complex?
Replies: 1
Views: 15

Re: How to name iron in a TM complex?

you have to use the latin versions so it would be ferrous or ferrate
by Venus Hagan 3D
Sun Dec 01, 2019 10:06 pm
Forum: Lewis Acids & Bases
Topic: Strong versus weak
Replies: 5
Views: 19

Re: Strong versus weak

strong acids fully dissociate and become ions in water. weak acids dont dissociate completely and some of acid still remains.
by Venus Hagan 3D
Sat Nov 30, 2019 11:19 pm
Forum: Identifying Acidic & Basic Salts
Topic: salt and water formation
Replies: 5
Views: 19

Re: salt and water formation

In lecture, Lavelle said that Lewis acid and bases always produce salt but not always water. Bronstead acids and bases always produce water and salt.
by Venus Hagan 3D
Mon Nov 25, 2019 11:52 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Number
Replies: 3
Views: 18

Re: Coordination Number

the coordination number is pretty much how many ligand are attached to the central atom
by Venus Hagan 3D
Mon Nov 25, 2019 11:49 pm
Forum: Naming
Topic: -ate ending
Replies: 8
Views: 36

Re: -ate ending

if the complex has an overall negative charge you would add -ate to the end of the metal's name
by Venus Hagan 3D
Mon Nov 25, 2019 11:48 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Transition Metals
Replies: 4
Views: 30

Re: Transition Metals

i think we will only see coordination compounds with transition metals
by Venus Hagan 3D
Mon Nov 25, 2019 11:43 pm
Forum: Lewis Acids & Bases
Topic: When is an acid considered Bronsted?
Replies: 9
Views: 53

Re: When is an acid considered Bronsted?

Maya Pakulski 3D wrote:Why are there there two definitions for acids and bases? Why not just one?

the two definitions focus on different things. Bronstead focuses on the transfer of protons or H+ ions and Lewis focuses on electrons
by Venus Hagan 3D
Tue Nov 19, 2019 6:24 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: induced dipole-induced dipole
Replies: 4
Views: 28

Re: induced dipole-induced dipole

They pretty much happen in all molecules all of the time because the electrons are always moving and can pile up on one side temporarily at any time.
by Venus Hagan 3D
Sun Nov 17, 2019 11:39 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing molecules
Replies: 12
Views: 60

Re: Drawing molecules

We do not need to know how to draw the 3D models with the bold and dashed lines. We just need to draw Lewis structures and know the shapes.
by Venus Hagan 3D
Sun Nov 17, 2019 11:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bonds in VSEPR
Replies: 11
Views: 45

Re: Bonds in VSEPR

We don't care about whether it is a single or double or triple bond. We consider them all a single region of electron density.
by Venus Hagan 3D
Sun Nov 17, 2019 11:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Resonance and VSEPR
Replies: 9
Views: 33

Re: Resonance and VSEPR

I don't think so because double and triple bonds are still considered one region of electron density.
by Venus Hagan 3D
Sun Nov 17, 2019 11:29 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Notation
Replies: 7
Views: 36

Re: VSEPR Notation

I think the notation would just not include E at all. It could look something like AX5
by Venus Hagan 3D
Sun Nov 17, 2019 11:16 pm
Forum: Electronegativity
Topic: Noble Gases
Replies: 19
Views: 77

Re: Noble Gases

Noble gases typically are not included in the periodic trends. For electronegativity, they would have a very low value due to their filled valence shells.
by Venus Hagan 3D
Sun Nov 03, 2019 11:24 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Atomic Orbitals
Replies: 4
Views: 30

Re: Atomic Orbitals

I think for this we would need to know that orbitals look the way they look because they have certain nodal planes where the electrons have a zero probability of existing. So like the p orbitals have two lobes because there is a nodal plane where an electron will never exist, and the s orbital is sp...
by Venus Hagan 3D
Sun Nov 03, 2019 11:17 pm
Forum: *Shrodinger Equation
Topic: effective nuclear charge
Replies: 6
Views: 57

Re: effective nuclear charge

The effective nuclear charge is the net charge of the protons in the nucleus after taking into account the electron shielding. If you take away some of the electrons, the amount of electron shielding will decrease and the higher your effective nuclear charge will be.
by Venus Hagan 3D
Sun Nov 03, 2019 11:04 pm
Forum: Lewis Structures
Topic: central atom
Replies: 16
Views: 106

Re: central atom

The central atoms should be the least electronegative atom. My TA also mentioned that if you have a molecule and its like one of an element and 4 of another then the central atom will probably be the element that only has one.
by Venus Hagan 3D
Sun Nov 03, 2019 10:33 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043120

Re: Post All Chemistry Jokes Here

Did you hear about oxygen's date with potassium ??

It went OK.
by Venus Hagan 3D
Sun Nov 03, 2019 10:27 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron configuration for D block
Replies: 3
Views: 23

Re: Electron configuration for D block

You only fill the 3d orbital before finishing the 4s orbital for Chromium and Copper (for this class because we don't go past the first row of the d-block). This happens because Cr almost has a half-filled d orbital and copper almost has a fully filled d orbital. A half or fully filled d orbital is ...
by Venus Hagan 3D
Sun Oct 27, 2019 10:13 pm
Forum: Ionic & Covalent Bonds
Topic: electron configuration
Replies: 5
Views: 42

Re: electron configuration

I think Copper and Chromium are the exceptions we have to worry about for this class. They are different because they almost have a half-filled or filled d orbital. Having a half-filled or filled d orbital is more stable than the filled 4 s orbital and so it takes one of the 4s electrons. The electr...
by Venus Hagan 3D
Sun Oct 27, 2019 10:06 pm
Forum: Ionic & Covalent Bonds
Topic: periodic table
Replies: 10
Views: 71

Re: periodic table

Kennedi3K wrote:Is this the same for ionization energy?

Yes the trend for ionization energy also increases as you go up and to the right.
by Venus Hagan 3D
Sun Oct 27, 2019 10:04 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Spins
Replies: 4
Views: 33

Re: Spins

Based on Hund's Rule, electrons will always start parallel and fill up all of the orbitals with only one electron before going back and pairing up.
by Venus Hagan 3D
Sun Oct 27, 2019 9:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Study Tips!
Replies: 7
Views: 40

Re: Study Tips!

I personally like to watch videos on youtube or khan academy for topics that I don't quite understand. One really great YouTuber is Bozeman Science.
by Venus Hagan 3D
Sun Oct 27, 2019 9:39 pm
Forum: Resonance Structures
Topic: Drawing Resonance Structures
Replies: 3
Views: 29

Re: Drawing Resonance Structures

I think Professor Lavelle said in class that the resonance structures will be drawn with the double-sided arrows.
by Venus Hagan 3D
Sun Oct 20, 2019 11:20 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 247

Re: Best Way To Study?

I think the modules are one of the most helpful tools for me because I am able to strengthen my understanding of the topics taught in lectures. It is easy to pause or rewind the video when you are confused, and the post-assessment questions are really helpful to make sure you know how to apply the c...
by Venus Hagan 3D
Sun Oct 20, 2019 11:16 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Clarification on electron configuration
Replies: 5
Views: 26

Re: Clarification on electron configuration

I am pretty sure we just have to know the first row for the d-block.
by Venus Hagan 3D
Sun Oct 20, 2019 11:09 pm
Forum: Properties of Light
Topic: Balmer and Lyman Series
Replies: 5
Views: 39

Re: Balmer and Lyman Series

The 1 and 2 are the names of the energy levels. It not like final and initial. When an excited electron starts at some higher level (2,3,4 or 5) and falls to the 1 energy level then it is in the Lyman series. When the excited electron starts at some higher level (3,4,or 5) and falls to the 2 energy ...
by Venus Hagan 3D
Sun Oct 20, 2019 3:27 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 7
Views: 45

Re: Photoelectric Effect

An electron is not ejected because increasing the light's intensity only increases the number of photons. If your 10 photons don't have enough energy, adding 50 more of the same energy won't cause the electrons to eject. You must increase the energy of each of the photons allowing each to overcome t...
by Venus Hagan 3D
Sun Oct 20, 2019 3:09 pm
Forum: Balancing Chemical Reactions
Topic: Balancing equations.
Replies: 12
Views: 113

Re: Balancing equations.

I would say to try to balance the most difficult molecules first. Some molecules like O2 that are just one element can be easily adjusted without effecting other things you have previously balanced. If you leave these towards the end, then you will have to do less adjusting overall.
by Venus Hagan 3D
Sun Oct 13, 2019 7:27 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7726
Views: 1043120

Re: Post All Chemistry Jokes Here

Don't trust atoms, they make up eveything.
by Venus Hagan 3D
Sun Oct 13, 2019 7:20 pm
Forum: Molarity, Solutions, Dilutions
Topic: Problem G13
Replies: 2
Views: 65

Re: Problem G13

The experiment needs to have 60 ml of the 0.5M solution. If you did not add the extra 48 ml of water, it would not be the right volume or molarity.
by Venus Hagan 3D
Sun Oct 13, 2019 7:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 3 Homework Problems
Replies: 1
Views: 24

Week 3 Homework Problems

Hi :) I just wanted to confirm that the homework due for week three should be from the quantum world section.
by Venus Hagan 3D
Sun Oct 13, 2019 7:04 pm
Forum: Administrative Questions and Class Announcements
Topic: How to check how many points I have this week for posting on Chemistry Community?
Replies: 11
Views: 70

Re: How to check how many points I have this week for posting on Chemistry Community?

Similar to everyone else, I have been going under the quick links section and keeping track for myself how many posts I have made.
by Venus Hagan 3D
Sun Oct 13, 2019 7:01 pm
Forum: General Science Questions
Topic: Audio-Visual focus topics
Replies: 4
Views: 21

Re: Audio-Visual focus topics

I believe they are an extra resource to use for comprehension. I do not think that have a set deadline.
by Venus Hagan 3D
Sun Oct 06, 2019 12:15 pm
Forum: Empirical & Molecular Formulas
Topic: Combustion Analysis
Replies: 6
Views: 61

Re: Combustion Analysis

If it is a hydrocarbon that is combusting and it combusts completely, then its the hydrocarbon and O2 on the reactant side and CO2 and H2O on the product side.
by Venus Hagan 3D
Thu Oct 03, 2019 8:13 pm
Forum: SI Units, Unit Conversions
Topic: How to format homework
Replies: 9
Views: 95

Re: How to format homework

I don't think the format matters too much. The syllabus just mentions being clear what problem you are working on making sure you have the chapter and problem number.
by Venus Hagan 3D
Thu Oct 03, 2019 8:02 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Determining Molar Mass
Replies: 7
Views: 53

Re: Determining Molar Mass

I also think the 16 would be fine. My TA also rounded during discussion.
by Venus Hagan 3D
Thu Oct 03, 2019 7:47 pm
Forum: Significant Figures
Topic: Next Week's Test 1
Replies: 9
Views: 98

Re: Next Week's Test 1

This same question came up in my discussion section and my TA said that they aren't really looking for the correct sig figs. He said to know the rules and review it if it's been a while but it's not stressed on the test. He also mentioned you should pay attention to your units because they will be l...
by Venus Hagan 3D
Thu Oct 03, 2019 7:42 pm
Forum: Empirical & Molecular Formulas
Topic: Clarification
Replies: 6
Views: 73

Re: Clarification

It is possible to go from molecular to empirical. You would just need to get each of the subscripts in the formula and change it so they are at the simplest ratio and still keeping whole numbers. I don't think we would really need to do this though.

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