Search found 36 matches
- Sat Dec 08, 2018 8:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: A.X.E.
- Replies: 4
- Views: 657
Re: A.X.E.
When doing VSEPR formula, X are atoms whilst each E is a lone pair on the central atom.
- Sat Dec 08, 2018 8:14 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals
- Replies: 2
- Views: 364
Re: Radicals
A radical is an atom or molecule with an unpaired valence electron, or molecules with an odd number of valence electrons.
- Fri Dec 07, 2018 5:20 pm
- Forum: Biological Examples
- Topic: Ligands
- Replies: 6
- Views: 997
Re: Ligands
Commenting so I can come back to this when studying ligands.
- Fri Dec 07, 2018 5:18 pm
- Forum: Conjugate Acids & Bases
- Topic: Chemical Equations
- Replies: 6
- Views: 709
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.
- Fri Dec 07, 2018 5:15 pm
- Forum: Amphoteric Compounds
- Topic: What makes something amphoteric?
- Replies: 6
- Views: 838
Re: What makes something amphoteric?
I have this same question...I'm gonna comment so I can come back to it later.
- Sun Dec 02, 2018 10:59 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3872084
Re: Post All Chemistry Jokes Here
I don't trust atoms.... I heard they make up everything.
- Sun Dec 02, 2018 10:55 pm
- Forum: Coordinate Covalent Bonds
- Topic: Oxidation states "()" in naming coord compounds
- Replies: 4
- Views: 688
Re: Oxidation states "()" in naming coord compounds
The metals lose electrons very easily so their charge is always positive.
- Sun Dec 02, 2018 10:47 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 21706
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
Thank you very much for this!
- Sun Dec 02, 2018 10:42 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: "Bronsted" and "Lewis" Interchangability
- Replies: 2
- Views: 287
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.
- Sat Nov 24, 2018 9:52 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: HW Question 2E21 Part D
- Replies: 1
- Views: 206
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.
- Thu Nov 22, 2018 11:02 pm
- Forum: Dipole Moments
- Topic: Bond Angles
- Replies: 8
- Views: 892
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.
- Thu Nov 22, 2018 11:00 pm
- Forum: Dipole Moments
- Topic: Polarity
- Replies: 5
- Views: 1320
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...
- Mon Nov 19, 2018 2:16 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal Charge
- Replies: 8
- Views: 3537
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...
- Thu Nov 15, 2018 4:50 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR model
- Replies: 3
- Views: 398
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.
- Tue Nov 06, 2018 9:17 pm
- Forum: Lewis Structures
- Topic: expanded octet
- Replies: 2
- Views: 480
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.
- Tue Nov 06, 2018 9:15 pm
- Forum: Dipole Moments
- Topic: london forces
- Replies: 7
- Views: 865
Re: london forces
Yup, all molecules have london forces I believe due to the way electrons orbit the atom.
- Tue Nov 06, 2018 9:13 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3872084
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 ;)
- Tue Nov 06, 2018 9:11 pm
- Forum: Resonance Structures
- Topic: Resonance Hybrids
- Replies: 3
- Views: 406
Re: Resonance Hybrids
From my understanding, it must have an octet or an expanded octet but not less.
- Tue Nov 06, 2018 9:09 pm
- Forum: Lewis Structures
- Topic: Identifying the element
- Replies: 8
- Views: 956
Re: Identifying the element
Tagging on with the other posters formal charge is the explanation for the answer.
- Tue Nov 06, 2018 9:03 pm
- Forum: Student Social/Study Group
- Topic: Test & Exam Dates
- Replies: 4
- Views: 507
Re: Test & Exam Dates
The schedule says they begin Tuesday November 27th.
- Tue Nov 06, 2018 9:01 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: HW for discussion
- Replies: 9
- Views: 1076
Re: HW for discussion
I did the problems towards the end of chapter 3.
- Tue Nov 06, 2018 8:59 pm
- Forum: Administrative Questions and Class Announcements
- Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
- Replies: 121
- Views: 21735
Re: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Thank you so much for this review it really helped me!
- Sun Oct 28, 2018 11:52 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3872084
Re: Post All Chemistry Jokes Here
What show do Cesium and Iodine love watching with one another?
CSI
CSI
- Sun Oct 28, 2018 11:50 pm
- Forum: Lewis Structures
- Topic: Lines that Represent Bonds
- Replies: 7
- Views: 636
Re: Lines that Represent Bonds
If I'm not mistaken both methods are correct, it depends on what you feel more comfortable with.
- Sun Oct 28, 2018 11:47 pm
- Forum: Ionic & Covalent Bonds
- Topic: Roman numerals next to element
- Replies: 8
- Views: 6173
Re: Roman numerals next to element
It signifies the charge of that atom as some elements have different ion forms.
- Sun Oct 28, 2018 11:47 pm
- Forum: Ionic & Covalent Bonds
- Topic: Covalent Bonds
- Replies: 16
- Views: 1653
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.
- Sun Oct 28, 2018 11:45 pm
- Forum: Ionic & Covalent Bonds
- Topic: ionization energy
- Replies: 3
- Views: 450
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.
- Sun Oct 21, 2018 1:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3872084
Re: Post All Chemistry Jokes Here
What is a cation afraid of? A Dogion!
- Sun Oct 21, 2018 1:30 pm
- Forum: Properties of Light
- Topic: TEST 2
- Replies: 7
- Views: 848
Re: TEST 2
It should be given as a constant.
- Sun Oct 21, 2018 1:30 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Test 2 Material
- Replies: 9
- Views: 693
Re: Test 2 Material
I'd just go with what the outline for test 2 had on Professor Lavelle's website.
- Sat Oct 13, 2018 8:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3872084
Re: Post All Chemistry Jokes Here
Did you hear oxygen went on a date with potassium?
.....it went OK.
.....it went OK.
- Sat Oct 13, 2018 8:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Writing in Pen
- Replies: 13
- Views: 1048
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.
- Sat Oct 13, 2018 8:31 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Avogadro's Constant Definition
- Replies: 7
- Views: 1065
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.
- Fri Oct 05, 2018 6:42 pm
- Forum: SI Units, Unit Conversions
- Topic: How does grading for discussion posts work?
- Replies: 80
- Views: 9122
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.
- Fri Oct 05, 2018 6:40 pm
- Forum: Balancing Chemical Reactions
- Topic: States of Matter
- Replies: 11
- Views: 1063
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.
- Fri Oct 05, 2018 6:23 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Part C of question E.17
- Replies: 2
- Views: 145
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.