Search found 36 matches

by ElliotPourdavoud 1A
Sat Dec 08, 2018 8:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: A.X.E.
Replies: 4
Views: 196

Re: A.X.E.

When doing VSEPR formula, X are atoms whilst each E is a lone pair on the central atom.
by ElliotPourdavoud 1A
Sat Dec 08, 2018 8:14 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Radicals
Replies: 2
Views: 88

Re: Radicals

A radical is an atom or molecule with an unpaired valence electron, or molecules with an odd number of valence electrons.
by ElliotPourdavoud 1A
Fri Dec 07, 2018 5:20 pm
Forum: Biological Examples
Topic: Ligands
Replies: 3
Views: 176

Re: Ligands

Commenting so I can come back to this when studying ligands.
by ElliotPourdavoud 1A
Fri Dec 07, 2018 5:18 pm
Forum: Conjugate Acids & Bases
Topic: Chemical Equations
Replies: 6
Views: 170

Re: Chemical Equations

The acid is the one that picks up the Hydrogen proton, while the base is the one that loses the hydrogen proton.
by ElliotPourdavoud 1A
Fri Dec 07, 2018 5:15 pm
Forum: Amphoteric Compounds
Topic: What makes something amphoteric?
Replies: 6
Views: 186

Re: What makes something amphoteric?

I have this same question...I'm gonna comment so I can come back to it later.
by ElliotPourdavoud 1A
Sun Dec 02, 2018 10:59 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912354

Re: Post All Chemistry Jokes Here

I don't trust atoms.... I heard they make up everything.
by ElliotPourdavoud 1A
Sun Dec 02, 2018 10:55 pm
Forum: Coordinate Covalent Bonds
Topic: Oxidation states "()" in naming coord compounds
Replies: 4
Views: 197

Re: Oxidation states "()" in naming coord compounds

The metals lose electrons very easily so their charge is always positive.
by ElliotPourdavoud 1A
Sun Dec 02, 2018 10:42 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: "Bronsted" and "Lewis" Interchangability
Replies: 2
Views: 63

Re: "Bronsted" and "Lewis" Interchangability

I don't think this is the case, a Lewis acid is an acid that can accept an electron whilst bronsted acids are proton donors.
by ElliotPourdavoud 1A
Sat Nov 24, 2018 9:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW Question 2E21 Part D
Replies: 1
Views: 46

Re: HW Question 2E21 Part D

Professor Lavelle said in class for ones that are slightly less than the norm, you have to just search it up, I think saying that it is less than 109.5 is fine for the homework.
by ElliotPourdavoud 1A
Thu Nov 22, 2018 11:02 pm
Forum: Dipole Moments
Topic: Bond Angles
Replies: 8
Views: 148

Re: Bond Angles

There's the normal ones like tetrahedral that you can just memorize, but for a lot of molecules where those angles are tweaked a bit you can't just memorize them other than knowing that they will be greater or less than the usual value.
by ElliotPourdavoud 1A
Thu Nov 22, 2018 11:00 pm
Forum: Dipole Moments
Topic: Polarity
Replies: 5
Views: 528

Re: Polarity

Since water is polar, it has both negative and positive regions in the molecule, the reason this is good for dissolving ionic compounds is that the water molecule and the ionic compound attract each other and thus it dissolves in water, while nonpolar molecules repel away from water and don't dissol...
by ElliotPourdavoud 1A
Mon Nov 19, 2018 2:16 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 8
Views: 376

Re: Formal Charge

Another way is to count each electron that surrounds the atom in question and give it a value of 1 (ex. if an atom has 1 lone pair, you count both electrons as 1) then you count each bond as 1, (ex. if an atom has 2 bonds each bond is counted as 1) then you just add those values together and subtrac...
by ElliotPourdavoud 1A
Thu Nov 15, 2018 4:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR model
Replies: 3
Views: 70

Re: VSEPR model

I think it's because the electrons are still within that region, instead of it having one pair that is located there, it is two or three pairs there but they are still in that region.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:17 pm
Forum: Lewis Structures
Topic: expanded octet
Replies: 2
Views: 83

Re: expanded octet

I believe that formal charge is a good way to see if an atom can have an expanded octet to make it the most stable.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:15 pm
Forum: Dipole Moments
Topic: london forces
Replies: 7
Views: 291

Re: london forces

Yup, all molecules have london forces I believe due to the way electrons orbit the atom.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:13 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912354

Re: Post All Chemistry Jokes Here

The human body is primarily composed of Carbon, Hydrogen, and Oxygen, and a little bit of Sodium, so that means we're 100% NaCHO ;)
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:11 pm
Forum: Resonance Structures
Topic: Resonance Hybrids
Replies: 3
Views: 99

Re: Resonance Hybrids

From my understanding, it must have an octet or an expanded octet but not less.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:09 pm
Forum: Lewis Structures
Topic: Identifying the element
Replies: 8
Views: 160

Re: Identifying the element

Tagging on with the other posters formal charge is the explanation for the answer.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:03 pm
Forum: Student Social/Study Group
Topic: Test & Exam Dates
Replies: 4
Views: 133

Re: Test & Exam Dates

The schedule says they begin Tuesday November 27th.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 9:01 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: HW for discussion
Replies: 9
Views: 225

Re: HW for discussion

I did the problems towards the end of chapter 3.
by ElliotPourdavoud 1A
Tue Nov 06, 2018 8:59 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 5125

Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]

Thank you so much for this review it really helped me!
by ElliotPourdavoud 1A
Sun Oct 28, 2018 11:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912354

Re: Post All Chemistry Jokes Here

What show do Cesium and Iodine love watching with one another?



CSI
by ElliotPourdavoud 1A
Sun Oct 28, 2018 11:50 pm
Forum: Lewis Structures
Topic: Lines that Represent Bonds
Replies: 7
Views: 95

Re: Lines that Represent Bonds

If I'm not mistaken both methods are correct, it depends on what you feel more comfortable with.
by ElliotPourdavoud 1A
Sun Oct 28, 2018 11:47 pm
Forum: Ionic & Covalent Bonds
Topic: Roman numerals next to element
Replies: 8
Views: 282

Re: Roman numerals next to element

It signifies the charge of that atom as some elements have different ion forms.
by ElliotPourdavoud 1A
Sun Oct 28, 2018 11:47 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 16
Views: 278

Re: Covalent Bonds

Non metals tend to gain an electron simply due to their valence electrons needing a small number of electrons to complete their octet rather than losing those electrons.
by ElliotPourdavoud 1A
Sun Oct 28, 2018 11:45 pm
Forum: Ionic & Covalent Bonds
Topic: ionization energy
Replies: 3
Views: 63

Re: ionization energy

As the person above me stated, atoms with higher ionization energy are less likely to lose an electron to become a cation.
by ElliotPourdavoud 1A
Sun Oct 21, 2018 1:32 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912354

Re: Post All Chemistry Jokes Here

What is a cation afraid of? A Dogion!
by ElliotPourdavoud 1A
Sun Oct 21, 2018 1:30 pm
Forum: Properties of Light
Topic: TEST 2
Replies: 7
Views: 166

Re: TEST 2

It should be given as a constant.
by ElliotPourdavoud 1A
Sun Oct 21, 2018 1:30 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Test 2 Material
Replies: 9
Views: 91

Re: Test 2 Material

I'd just go with what the outline for test 2 had on Professor Lavelle's website.
by ElliotPourdavoud 1A
Sat Oct 13, 2018 8:34 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 912354

Re: Post All Chemistry Jokes Here

Did you hear oxygen went on a date with potassium?


.....it went OK.
by ElliotPourdavoud 1A
Sat Oct 13, 2018 8:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Writing in Pen
Replies: 13
Views: 296

Re: Writing in Pen

As someone said before, I do most of my homework in pen and it does take some getting used to but it has allowed me to be comfortable using a pen on exams in my previous courses.
by ElliotPourdavoud 1A
Sat Oct 13, 2018 8:31 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's Constant Definition
Replies: 7
Views: 349

Re: Avogadro's Constant Definition

Avogadro's constant will apply to molecules as well as individual elements it is a mol of the molecule or a mol of the atom.
by ElliotPourdavoud 1A
Fri Oct 05, 2018 6:42 pm
Forum: SI Units, Unit Conversions
Topic: How does grading for discussion posts work?
Replies: 73
Views: 2199

Re: How does grading for discussion posts work?

I think Professor Lavelle just said any post counts as a post and you have to do 3 per week.
by ElliotPourdavoud 1A
Fri Oct 05, 2018 6:40 pm
Forum: Balancing Chemical Reactions
Topic: States of Matter
Replies: 11
Views: 221

Re: States of Matter

No, I'm pretty sure that the states of matter don't affect balancing as the only thing that does is the quantity of atoms.
by ElliotPourdavoud 1A
Fri Oct 05, 2018 6:23 pm
Forum: Molarity, Solutions, Dilutions
Topic: Part C of question E.17
Replies: 2
Views: 41

Re: Part C of question E.17

Atoms per mole is a constant, so if they have the same amount of atoms they have the same amount of moles.

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