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Archive for November 8th, 2006

behold the magnetic H.

“However, different 1H or 13C nuclei absorb at slightly different frequencies. This difference results from differences in the small internal magnetic field Be for each 1H or 13C nucleus. Again, the Be field results from the circulation of electrons of the molecule. Different 1H or 13C nuclei have different electron density surrounding them and consequently, are shielded from the applied field Bo by Be fields of different magnitude. Remember, differences in (Bo-Be) translate into differences in the frequency needed to cause the nuclear spin transitions..”

http://orgchem.colorado.edu/hndbksupport/nmrtheory/chemshift.html

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aq. NaBr.

“Electrolysis of an aqueous solution of NaBr will produce hydrogen at the cathode, as the aqueous sodium sulfate solution did, because neither Na+(aq) nor Br-(aq) can be reduced at potentials which are less negative than standard hydrogen. The electrolysis of aqueous NaBr solutions will produce bromine at the anode because the standard potential of bromide oxidation is less positive than that of the oxidation of water.”

http://www.ualberta.ca/~jplambec/che/p102/p02112.htm

ahhhh. i wrote water discharged!! haha. fine.

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