This picture should explain it
http://www.chemistry.wustl.edu/~edudev/LabTutorials/Water/PublicWaterSupply/images/nacl.jpg
NaCl doesn't exist as just one Na+ ion bonded to just one Cl- ion. Its millions of Na+ cations and Cl- anions ionically bonded to form a lattice like that.
The obvious way would be to look for the parent peak (the peak caused by the unfragmented molecular ion) at the end of the spectrum but how can you tell the parent peak from one caused by heavier isotopes? Also how do you know if there's a parent peak at all and that all the peaks aren't...
Heres the question
[PLAIN]http://img213.imageshack.us/img213/2669/16772870.jpg
I know that I'm supposed to derive these values from the fact that I know the absorptions of 2 different isotopes of the diatomic molecule but I don't know how to go about doing it. I can obtain the masses of...
The 2nd chapter in my spectroscopy course is titled quantum mechanics and at the end of it it goes on about particles in 1 dimensional boxes. What would I google to find info on this kinda thing? Quantum chemistry?
On my notes, the lecturer left out some of the formulae as blanks which we were supposed to fill in as we went a long but I'm missing a few of them. The 1st one is:
[PLAIN]http://img213.imageshack.us/img213/6627/screenshotdh.png
I'm stuck here, I can't figure out what equation he's...
So the n=1 series is all the spectral lines emitted by electrons as they fall back to the 1st energy shell. Why do they all emit UV radiation? If the energy emitted is the energy difference between the 2 energy levels then it makes sense that Lyman lines are higher in energy than Balmer lines...
I noticed that the hydrogen spectral lines are grouped into 6 series and given a value for n. I also noticed that each series was named after its discoverer but "coincidentally?" falls into a specific region of the EM spectrum so the Lyman series (n=1) of lines are all in the UV region, the...
Yeah that's a complete scan. Heres an NMR for trans-cinnamic acid:
[PLAIN]http://img526.imageshack.us/img526/7272/imgcgi.gif
from http://riodb01.ibase.aist.go.jp
Actually yeah they do match don't they. Only difference is magnitude of the peak at 12.5.
They're both hydrocarbon distillate fractions but mineral turps is heavier. White spirit is hydrocarbons in the C7 to C12 range. Mineral turps is C9-C16.
[PLAIN]http://img585.imageshack.us/img585/362/nmrs.jpg
I had to identify an unknown in the lab and it was a UV active acid with a melting point of 133C-135C. Sodium fusion test revealed no heteroatoms so the only compound that fits the criteria is cinnamic acid but although the IR matches that...
[PLAIN]http://img443.imageshack.us/img443/6488/mechanisma1.png
The magnesium transfers an electron to the C-X bond, yielding a Mg radical. The halogen atom leaves with 2 electrons from the bond and the carbon is converted into a radical. The negatively charged bromide ion forms an ionic bond...
I'm looking for a device that can record EM signals of unknown frequencies (unknown to me) emitted by devices. For example if I point my remote control at it and start pressing buttons it should record intermittent IR frequency surges. Or for example if I build an emitter to modulate an...
I've noticed there aren't many useful templates that come with ChemDraw. Anyone know a good site for downloading template packs? I've been making my own but the more complex the molecules get, the more trouble I have making them with ChemDraw which is why templates would be useful.
The amino group is a nucleophile but I'm not too sure about phthalic anhydrides electrophilicity. The carbonyl carbons of the anhydride would be electrophilic enough I suppose. Heres my guess. The amino group attacks one of the carbonyl carbons of the anhydride which breaks the C=O pi bond and...