Search found 32 matches

by Andrewwiner4D
Mon Dec 03, 2018 4:36 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Hydronium
Replies: 4
Views: 99

Re: Hydronium

Both essentially the same thing but when working in an aqueous solution, it is easier the refer as H30+ because water is the proton acceptor.
by Andrewwiner4D
Mon Dec 03, 2018 4:28 pm
Forum: Conjugate Acids & Bases
Topic: Conjugate of oxoacid
Replies: 3
Views: 93

Re: Conjugate of oxoacid

I know these are not the same acids but this is a good explanation Lavelle gave in 2014: HOCl vs HOI --> To analyze the acidity of this pair you [censored] the polarizing power of the conjugate base (eg. -OCl and -OI). The more electronegative species (-OCl) will polarize ( pull charge towards it) t...
by Andrewwiner4D
Mon Dec 03, 2018 4:20 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pOH
Replies: 5
Views: 258

Re: pOH

We do need to be able to do both. In all the homework problems (or most) you had to find both. But they are pretty easy and depending on which compounds we are working with it is a useful skill.
by Andrewwiner4D
Mon Dec 03, 2018 4:18 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Relative Acidity
Replies: 1
Views: 57

Re: Relative Acidity

A stronger acid will disassociate more and because KA is the ratio of product concentrations over reactant concentrations, the more products, will increase KA. Then since pKA is the negative log of KA the values will decrease and be more acidic.
by Andrewwiner4D
Mon Dec 03, 2018 4:15 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: As2O3 and Bi2O3
Replies: 1
Views: 38

Re: As2O3 and Bi2O3

Check this out; it is a good explanation:
viewtopic.php?f=55&t=610
by Andrewwiner4D
Mon Dec 03, 2018 3:58 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Tetrahedral vs. square-planar
Replies: 6
Views: 180

Re: Tetrahedral vs. square-planar

The square planar has six areas of electron density surrounding the central atom: four of these are other bonded atoms and two are lone pairs. Tetrahedral will have angles of 109.5 where the square planar will have angles of 90.
by Andrewwiner4D
Mon Dec 03, 2018 3:55 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Negative pH?
Replies: 5
Views: 93

Re: Negative pH?

Dr. Lavelle said there are such things as super acids and bases. The super bases can have pH values greater than 14 and super acids can have pH values below 0.
by Andrewwiner4D
Mon Dec 03, 2018 3:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework week 10
Replies: 3
Views: 125

Re: Homework week 10

YES OF COURSE
by Andrewwiner4D
Tue Nov 27, 2018 2:54 pm
Forum: Hybridization
Topic: 2F.13 7th Ed
Replies: 4
Views: 107

Re: 2F.13 7th Ed

There are three areas of electron concentration. Total valence electrons for CH2 is 6. Each hydrogen has one bond and there is one lone pair. The bent shape will give you an SP2 hybridization.
by Andrewwiner4D
Sun Nov 25, 2018 4:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: pi and sigma bonds
Replies: 9
Views: 183

Re: pi and sigma bonds

If your pi bond refers to the p-p orbitals overlapping, then pi bond is weaker than sigma bond. Double bond is stronger than single bond because double bond consists of a pi bond and a sigma bond. Whereas sigma bond results from s-orbital overlap which has greater area of interaction and overlapping.
by Andrewwiner4D
Sun Nov 25, 2018 4:56 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 3
Replies: 6
Views: 192

Re: Test 3

Yes you will need to be able to draw and name the VSEPR models and shapes.
by Andrewwiner4D
Sun Nov 25, 2018 4:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape
Replies: 7
Views: 140

Re: Molecular Shape

There are four bonded atoms and one lone pair. The angles of the bonded atoms are 90, 90>angle>180, and 180. Mostly the four bonded atoms are tetrahedral, but the lone pair pushes down the atoms.
by Andrewwiner4D
Sat Nov 10, 2018 9:11 pm
Forum: Dipole Moments
Topic: Hydrogen Bonds
Replies: 20
Views: 313

Re: Hydrogen Bonds

Covalent bonds are stronger than hydrogen bonds, but the induced dipole interactions are weaker than the hydrogen bond.
by Andrewwiner4D
Sat Nov 10, 2018 9:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing Lewis Structures with VSPER
Replies: 5
Views: 122

Re: Drawing Lewis Structures with VSPER

When it is telling you to draw the VSEPR structure, which I feel we will only be doing from now on, you must specify the bond length.
by Andrewwiner4D
Sun Nov 04, 2018 3:12 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 2
Views: 85

Re: Resonance Structures

First elements do not have a resonance, molecules do. Second, in nature molecules will go to the lowest energy state which involves (for our proposes) looking at formal charge.
by Andrewwiner4D
Sun Nov 04, 2018 3:06 pm
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 11
Views: 179

Re: Lewis Structures

No^ because in nature the molecule can literally just turn and the elements would switch whether they are on the right or the left.
by Andrewwiner4D
Sun Nov 04, 2018 3:04 pm
Forum: Trends in The Periodic Table
Topic: Cation and Anion Size
Replies: 3
Views: 126

Re: Cation and Anion Size

The trend is based on the fact that the ratio of protons to electrons in the shell becomes greater. There are more protons than electrons, so the shell will not be able to expand as far with the greater pull.
by Andrewwiner4D
Sun Oct 28, 2018 10:58 am
Forum: Ionic & Covalent Bonds
Topic: Bond
Replies: 9
Views: 212

Re: Bond

I think they are possible (in a lab can be generated) but there are none naturally occurring, and like these people said^^definitely not for this class.
by Andrewwiner4D
Sun Oct 28, 2018 10:56 am
Forum: Ionic & Covalent Bonds
Topic: electronegativity and ionization energy [ENDORSED]
Replies: 4
Views: 96

Re: electronegativity and ionization energy [ENDORSED]

I visualize ionization energy is having a struggle with an atom to pull one of its electron away from it, where electronegativity is an atom pulling my own electrons away when we are linking up (if the other atom has a higher electronegativity).
by Andrewwiner4D
Sun Oct 28, 2018 10:54 am
Forum: Ionic & Covalent Bonds
Topic: Lowest Ionization Energy [ENDORSED]
Replies: 7
Views: 193

Re: Lowest Ionization Energy [ENDORSED]

For connection purposes: think of ionization energy as having a similar trend to electronegativity. The elements that pull electrons more towards themselves when bonding are the same atoms that it is difficult to remove an electron from.
by Andrewwiner4D
Sun Oct 21, 2018 12:16 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electron configurations
Replies: 2
Views: 68

Re: Electron configurations

Starting the electron configuration at a noble gas is a shorthand, but in my own experience you become comfortable and memorize the structure. The noble gases are all P^6 so you can just count the rows down on the periodic table to determine. It's pretty simple, but there are some weird moments elec...
by Andrewwiner4D
Sat Oct 20, 2018 10:13 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Alternate names of n, l, ml, and ms
Replies: 2
Views: 107

Re: Alternate names of n, l, ml, and ms

n=principle quantum number
l=angular momentum quantum number
ml=magnetic quantum number
ms=spin magnetic quantum number
by Andrewwiner4D
Fri Oct 19, 2018 11:58 am
Forum: Properties of Light
Topic: Do I have to memorize the spectrum?
Replies: 20
Views: 393

Re: Do I have to memorize the spectrum?

You just need to know where light is visible. I do not believe that you will need to memorize every value, that'd be a little absurd.
by Andrewwiner4D
Tue Oct 16, 2018 1:48 pm
Forum: Properties of Light
Topic: Question 1B.7
Replies: 2
Views: 47

Question 1B.7

The question is about different aspects of sodium, but in the solutions guide it seems to have the energy per atom of sodium as a given. Will we be provided with such information on tests?
by Andrewwiner4D
Fri Oct 12, 2018 5:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: molar masses on the test
Replies: 7
Views: 284

Re: molar masses on the test

That reply is by Andrew Winer (4D).^^^
by Andrewwiner4D
Fri Oct 12, 2018 5:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: molar masses on the test
Replies: 7
Views: 284

Re: molar masses on the test

You will be provided a periodic table but will have to calculate molar masses on molecules.
by Andrewwiner4D
Fri Oct 12, 2018 5:27 pm
Forum: DeBroglie Equation
Topic: Negative Sign
Replies: 4
Views: 70

Re: Negative Sign

Because the electron is losing energy as it moves down energy levels. Photons will be emitted (Light will be visible).
-Andrew Winer 4D
by Andrewwiner4D
Fri Oct 12, 2018 5:23 pm
Forum: Properties of Electrons
Topic: Energy Levels
Replies: 4
Views: 279

Re: Energy Levels

That reply is by Andrew Winer^^
by Andrewwiner4D
Fri Oct 12, 2018 5:22 pm
Forum: Properties of Electrons
Topic: Energy Levels
Replies: 4
Views: 279

Re: Energy Levels

It has to do with the effective nuclear charge. Shielding also plays a factor. The shielding effect describes the balance between the pull of the protons on valence electrons and the repulsion forces from inner electrons. The effective nuclear charge is the net positive charge experienced by valence...
by Andrewwiner4D
Wed Oct 03, 2018 10:59 am
Forum: Significant Figures
Topic: Periodic Table Sig Figs
Replies: 4
Views: 172

Re: Periodic Table Sig Figs

I would wait to round till you get to the final answer. Use the extended version for calculations but then correct at the end for sig figs.
by Andrewwiner4D
Wed Oct 03, 2018 10:56 am
Forum: General Science Questions
Topic: Turning in Homework
Replies: 4
Views: 199

Re: Turning in Homework

You turn the homework into your TA during discussion. I believe they return it the following week and definitely before any exam. Also the homework is graded for accuracy so make sure to check your answers in the solutions guide.
by Andrewwiner4D
Wed Oct 03, 2018 10:55 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Mole Definition
Replies: 5
Views: 150

Re: Mole Definition

This definition was just an example for one element. The atomic weights given on the periodic table are grams per one mole, so if you wanted to look at another element, let's use hydrogen, one mole would equal 1.001 grams of hydrogen.

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