Search found 30 matches
- Sun Dec 09, 2018 11:44 pm
- Forum: Lewis Acids & Bases
- Topic: table 12.6
- Replies: 1
- Views: 535
table 12.6
"Correlation of Acid Strength and Oxidation Number": is this chart basically saying that in order for an acid to be stronger, there has to be more atoms in the molecule? (Bigger the molecule, the stronger the acid?) Or is it more complex than that? I remember the last part of the final, it...
- Sun Dec 09, 2018 11:39 pm
- Forum: Lewis Structures
- Topic: drawing complex lewis structures
- Replies: 1
- Views: 635
drawing complex lewis structures
how does one draw the lewis structure of a molecule as complex as CH3COOH? it's written in that order for a reason right? I totally get how to draw the simple ones like CH4, but for complex molecules, I don't even know where to start. Help please!! thanks!!!
- Sun Dec 09, 2018 11:17 pm
- Forum: Amphoteric Compounds
- Topic: acidic oxide [ENDORSED]
- Replies: 3
- Views: 1010
acidic oxide [ENDORSED]
hi!! can someone dumb down the concept of acidic oxides for me please?? I'm trying to understand it from the textbook but it's so complex and I really don't get it, as many times as I reread it over and over again. thankssss!!
- Sun Dec 09, 2018 11:08 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis and Bronsted-Lowry Acids and Bases
- Replies: 1
- Views: 447
Lewis and Bronsted-Lowry Acids and Bases
What's the main difference between them two? The textbook is really confusing me
- Sun Dec 09, 2018 8:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3928425
Re: Post All Chemistry Jokes Here
"you must be made of copper and tellurium! because you're so CuTe" ;)
- Sun Dec 09, 2018 8:25 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3928425
Re: Post All Chemistry Jokes Here
"Why do chemists find working with ammonia easy?"
"Because it's some pretty basic stuff"
"Because it's some pretty basic stuff"
- Sun Dec 09, 2018 8:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3928425
Re: Post All Chemistry Jokes Here
"What's the chemical formula for banana?"
"BaNa2"
"BaNa2"
- Sun Dec 09, 2018 8:20 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3928425
Re: Post All Chemistry Jokes Here
"Anyone know any jokes about sodium?"
"Na"
"Na"
- Sun Dec 09, 2018 8:09 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3928425
Re: Post All Chemistry Jokes Here
"What kind of bear is soluble in water?"
"A polar bear!!!"
"A polar bear!!!"
- Sun Dec 02, 2018 11:52 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: chelates
- Replies: 5
- Views: 555
chelates
do chelates have a distinct shape? or do they just need to have the basis of a central atom?
- Sun Dec 02, 2018 11:50 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: what is a ligand?
- Replies: 8
- Views: 886
what is a ligand?
sorry this is a really dumb question, but is a ligand basically an atom that is attached to a central atom? what is it about ligands that makes them so important in this chapter?
- Sun Dec 02, 2018 11:47 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: identifying strong/weak acids and bases
- Replies: 1
- Views: 282
identifying strong/weak acids and bases
how can you identify if a molecule is a strong acid, strong base, weak acid, or weak base? is it just memorization or can you use the periodic table trends?
- Sun Nov 25, 2018 11:50 pm
- Forum: Hybridization
- Topic: degeneracy
- Replies: 2
- Views: 387
degeneracy
Why is degeneracy important when it comes to hybridization? What role does it play onto hybrid orbitals?
- Sun Nov 25, 2018 11:47 pm
- Forum: Hybridization
- Topic: Test 3
- Replies: 7
- Views: 898
Re: Test 3
lavelle hasn't mentioned the same exact number of problems yet, but if it's consistent with his previous two tests, it should be around 5-8 questions with several parts per question.
- Sun Nov 25, 2018 11:38 pm
- Forum: Hybridization
- Topic: sigma/pi bonds
- Replies: 7
- Views: 714
Re: sigma/pi bonds
If you went to Lavelle's lectures, you'd know that he made the pi bond and sigma bond analogy with his fingers -- if you put both your index fingers up and parallel to each other, that represents a pi bond, which is a bond that cannot rotate, whereas if you put the end of your index fingers together...
- Sun Nov 11, 2018 11:47 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shape
- Replies: 5
- Views: 618
Re: Molecular Shape
The difference between a bent molecule and a linear one is that the bent molecule has lone pairs whereas the linear one doesn't. This makes sense because the lone pair on the central atom creates a charge that pushes the outside atoms away, consequently bending the molecule.
- Sun Nov 11, 2018 11:45 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: How do you utilize the VSEPR model?
- Replies: 4
- Views: 465
How do you utilize the VSEPR model?
In my notes from Lavelle's lecture, it says that the "VSEPR Model explains experimentally observed shape of molecules," but how so? I have a whole chart with arrows pointing down but I'm not exactly sure what it means. If someone can decipher / elaborate on it, that'd be great!!
- Sun Nov 11, 2018 11:35 pm
- Forum: Coordinate Covalent Bonds
- Topic: Shape of the Molecule Contributes to Strength of Interaction
- Replies: 2
- Views: 571
Shape of the Molecule Contributes to Strength of Interaction
In this section of the notes from Friday's lecture, it was said that Pentane and 2,2-Dimethylpropane have the same molecular formula, but are physically shaped differently. How is that so? I jotted the notes down really fast so after glancing over them again, I don't quite get it conceptually.
- Sun Nov 04, 2018 5:05 pm
- Forum: Lewis Structures
- Topic: 12b from the GarBreadium worksheet
- Replies: 3
- Views: 363
12b from the GarBreadium worksheet
"draw the lowest energy Lewis structure for ClO4-" --> I know that if there's a minus sign in the molecular formula, you'd have to take it into account when adding up the valence electrons and drawing it into your Lewis structure, but when you had the brackets over the entire Lewis structu...
- Sun Nov 04, 2018 4:51 pm
- Forum: Sigma & Pi Bonds
- Topic: Midterm1
- Replies: 10
- Views: 1174
Midterm1
Do we need to know Sigma and Pi bonds for this upcoming midterm? From the past review sessions I've been going to, I haven't seen any TAs go over this, so I'm guessing it's probably not going to be on it??
- Sun Nov 04, 2018 4:49 pm
- Forum: Electronegativity
- Topic: (10d) are Ionization Energy trends different from Electron Affinity trends?
- Replies: 1
- Views: 244
(10d) are Ionization Energy trends different from Electron Affinity trends?
This is from problem 10d from the Garbreadium worksheet problems given at Lyndon's Saturday review session! It was said that the answer for "rank the following in order of increasing ionization energies" for the elements C, N, O, and F are C<O<N<F. However, Lyndon also brought up that for ...
- Sun Oct 28, 2018 10:19 pm
- Forum: Lewis Structures
- Topic: Dots in Lewis Stucture
- Replies: 14
- Views: 1257
Re: Dots in Lewis Stucture
It doesn't matter where the dots are placed as long as they're distributed as evenly as possible.
- Sun Oct 28, 2018 10:04 pm
- Forum: Ionic & Covalent Bonds
- Topic: Question regarding ionic bonds
- Replies: 9
- Views: 664
Re: Question regarding ionic bonds
Yes, always! And that's because ionic bonds are formed between a cation and anion, and cations are usually within metals, and anions are usually within nonmetals.
- Sun Oct 28, 2018 9:49 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity Trend
- Replies: 9
- Views: 1146
Re: Electron Affinity Trend
As you travel up and towards the right across the periodic table, elements become more and more electronegative, therefore have a higher electron affinity (attractiveness). This is because as you go right, there's an increase in valence electrons, and electrons are more attracted to valence shells t...
- Sun Oct 21, 2018 11:58 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenberg Uncertainty Question
- Replies: 3
- Views: 552
Heisenberg Uncertainty Question
I am confused about the overall concept of the Heisienberg Uncertainty Equation, as in how it derived? My TA explained in in my section, and that honestly confused me even more. I tried googling it too, but it just doesn't clear anything up for me. How can you determine the general position/velocity...
- Sun Oct 21, 2018 11:53 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: h with a line through it?
- Replies: 8
- Views: 1947
Re: h with a line through it?
h bar is essentially another way to say h/2pi. it can also be called Planck's constant, in case you didn't already know (I just discovered this in my discussion section)
- Sun Oct 21, 2018 11:50 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Energy levels of orbitals?
- Replies: 10
- Views: 781
Re: Energy levels of orbitals?
The order would go s<p<d<f, and that is because s is known to typically be the ground state, and in order for it jump to another orbital, it needs to be excited. Therefore, more energy is put into the system to stabilize it at that higher orbital --> energy level goes up
- Thu Oct 04, 2018 11:48 pm
- Forum: Balancing Chemical Reactions
- Topic: Mole Coefficients in Chemical Equations
- Replies: 6
- Views: 747
Mole Coefficients in Chemical Equations
for example, in 2Na + 2H2O --> 2NaOH + H2, the formula, in Mole terms is essentially 2 moles + 2 moles --> 2 moles + 1 mole. Why aren't the mole coefficients equal on both sides?
- Thu Oct 04, 2018 11:39 pm
- Forum: Significant Figures
- Topic: sig figs urgent question!
- Replies: 12
- Views: 2214
sig figs urgent question!
Hello! I have a quick general question on significant figures. If 0.001 has one sig fig, and 1.00 has three sig figs, how many sig figs would 1.001 have? Would you ignore the 0's in between the two 1's and say it has 2 sig figs, or would you take it into consideration and call it 4 sig figs? Thank y...
- Thu Oct 04, 2018 11:30 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: writing the formula of a molecule
- Replies: 5
- Views: 5902
writing the formula of a molecule
hi! I'm stuck on question E9 of the Review of Chemical & Physical Principles. it lists that I need to write magnesium sulfate heptahydrate as a formula. how would I do that/read it? thanks so much for your time!