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Steelflight-Rx
United States1389 Posts
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LosingID8
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Steelflight-Rx
United States1389 Posts
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Polyphasic
United States841 Posts
i'm averaging 11s on my physical sciences and my verbal, and i am averaging roughly 10 range on my bio, and i'm averaging like, 6 on my ochem section. Q#G%!TV@#%^G@FTR!#$%!F$%!F!D@#$!$^%!V FUCK YOU OCHEM!!!! FUCK YOU OCHEM!!! I HATE YOU!!!! I HATE YOU!!!!! WHY THE HELL DO I CARE ABOUT ALL THESE FUCKING REACTIONS, AS IF BIOCHEM WASn't BAD ENOUGH ahem. ... ... -_-;;;; | ||
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Steelflight-Rx
United States1389 Posts
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kpcrew
Korea (South)1071 Posts
raped it | ||
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minus_human
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tiffany
3664 Posts
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minus_human
4784 Posts
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Steelflight-Rx
United States1389 Posts
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LosingID8
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Steelflight-Rx
United States1389 Posts
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skyglow1
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fight_or_flight
United States3988 Posts
(In the first class all we did was basic molarity/stoichiometry/dimensional/gas stuff, second quarter was about bonding and a little bit of geometry. I might have forgotten some stuff, it was a long time ago.) | ||
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Steelflight-Rx
United States1389 Posts
For a taste of what I'm talking about, I'll explain a simplied version of the simples reaction in organic chemistry, the Sn2. Basically, any molocule with a lone pair of electrons is able to add to a carbon with a full octet as long as there is another molocule on that carbon which is more electronegative. For example, in this molocule [ (H3)C-Br ], the Br is electronegative, so an iodide anion (I-) which is less electronegative will bond with the carbon, and push the Br off. Now the iodide is sharing its electron density with the carbon through a bond, while the Br is a more stable anion. Things can affect the success of this reaction: for example if the (H3) were replaced with 3 hydrocarbon chains, the chains would block any viable path to the carbon, making the reaction near impossible. The difficulty in o-chem is in learning many different concepts, being able to generalize them, and apply them in new situations. Doing an o-chem problem is much more like solving a puzzle, while doing a general chemistry problem is much more like doing a math problem. But I'm no expert on the matter, I've only been studying it for a year =p | ||
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evanthebouncy!
United States12796 Posts
General Chem leaves me disgusted because it tried to do math and fails at it. ~~ | ||
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LosingID8
CA10835 Posts
predict the products + Show Spoiler + ![[image loading]](http://img231.imageshack.us/img231/4127/predictproductsagou3.png) ![[image loading]](http://img231.imageshack.us/img231/4207/predictproductshpvk5.png) synthesis + Show Spoiler + ![[image loading]](http://img154.imageshack.us/img154/3544/synthesisacen8.png) good luck | ||
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fight_or_flight
United States3988 Posts
On May 08 2008 06:17 Steelflight-Rx wrote: While general chemistry focuses a lot on the mathematical aspects of chemistry, organic chemistry focuses more on the conceptual aspects of chemistry. While general chemistry might ask you to calculate the dipole of a bond or molecule, organic just asks you to recognize that there is a dipole, then asks how that dipole might affect the way this molecule interacts with other molecules. For a taste of what I'm talking about, I'll explain a simplied version of the simples reaction in organic chemistry, the Sn2. Basically, any molocule with a lone pair of electrons is able to add to a carbon with a full octet as long as there is another molocule on that carbon which is more electronegative. For example, in this molocule [ (H3)C-Br ], the Br is electronegative, so an iodide anion (I-) which is less electronegative will bond with the carbon, and push the Br off. Now the iodide is sharing its electron density with the carbon through a bond, while the Br is a more stable anion. Things can affect the success of this reaction: for example if the (H3) were replaced with 3 hydrocarbon chains, the chains would block any viable path to the carbon, making the reaction near impossible. The difficulty in o-chem is in learning many different concepts, being able to generalize them, and apply them in new situations. Doing an o-chem problem is much more like solving a puzzle, while doing a general chemistry problem is much more like doing a math problem. But I'm no expert on the matter, I've only been studying it for a year =p On May 08 2008 06:37 evanthebouncy! wrote: Ochem was alot like Chem. General Chem leaves me disgusted because it tried to do math and fails at it. ~~ Hm, sounds interesting, but I don't think it would really be my thing. Its kind of funny because right now I'm taking a class called "Linearity, Symmetry, and Prediction in the Hydrogen Atom" which basically describes the hydrogen atom completely using only quantum mechanics and group theory. I don't think its possible to solve for the helium atom (3 body problem). Its really interesting, because everything (electronegativity, 8 electrons per shell, shell structure, etc.) is completely described by geometry (or so I think, we haven't actually solved the hydrogen atom yet). I'm pretty sure you are able to predict the periodic table in this way. (btw, I'm lost in the class at this point) | ||
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zer0das
United States8519 Posts
On May 08 2008 06:37 evanthebouncy! wrote: Ochem was alot like Chem. General Chem leaves me disgusted because it tried to do math and fails at it. ~~ Take Thermo and Quantum... I'm more disgusted by the math than it.  Gen chem is all grossly oversimplified, so the math is pretty easy (although it isn't for some people).Also: some sophomore chemistry major keeps freaking out about his Organic 2 final... I did pretty well on the standardized ACS exam (the final for that class), and in general I suck at remembering specific mechanisms. I didn't do so great in organic, but I've never seen anyone panic so much (that was a major anyways) over it. I can't help but feel like he's going to change majors or end up suicidal when he reaches the harder stuff. | ||
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zer0das
United States8519 Posts
On May 08 2008 07:44 fight_or_flight wrote: Hm, sounds interesting, but I don't think it would really be my thing. Its kind of funny because right now I'm taking a class called "Linearity, Symmetry, and Prediction in the Hydrogen Atom" which basically describes the hydrogen atom completely using only quantum mechanics and group theory. I don't think its possible to solve for the helium atom (3 body problem). Its really interesting, because everything (electronegativity, 8 electrons per shell, shell structure, etc.) is completely described by geometry (or so I think, we haven't actually solved the hydrogen atom yet). I'm pretty sure you are able to predict the periodic table in this way. (btw, I'm lost in the class at this point) It isn't that simple. It never is. But it's quite useful for spectroscopy. | ||
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GrayArea
United States872 Posts
 Just had the last exam for my ochem class today, and I don't think I did as well as I could have had I studied more (I did well on the other tests so I am not really really worried, just disappointed in myself kind of for not getting a really high score). Anyway, my final is next Friday, I am going to study mega hard to get a super high grade. | ||
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fight_or_flight
United States3988 Posts
On May 08 2008 11:43 zer0das wrote: It isn't that simple. It never is. But it's quite useful for spectroscopy. How do you know this? Are you a physics major? | ||
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zer0das
United States8519 Posts
However, the periodic table isn't going to reduce down to simple symmetry arguments. Relativity messes with the larger metals for one, and then there's much more than that... for every element that fits a trend, there's another that doesn't for any number of reasons. | ||
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