Qualification > Sciences
ALL CIE CHEMISTRY DOUBTS HERE !!
kulsoom:
hey guys!
i needed some help in NMR spectrometry...as in how do u deduce the molecular formula of a compound from the given chemical shifts? i dont understand it at all...
please hellppp!!
Thank uuu!! :) :)
Arthur Bon Zavi:
--- Quote from: SkyPilotage on May 03, 2011, 10:15:56 am ---I dont get what you mean by how but SO2 reduces KMnO4 and potassium dichromate too..... while it gets oxidised.
--- End quote ---
Reducing agent gets oxidised. Oxidising agent gets reduced.
Arthur Bon Zavi:
--- Quote from: kulsoom on May 03, 2011, 11:00:28 am ---hey guys!
i needed some help in NMR spectrometry...as in how do u deduce the molecular formula of a compound from the given chemical shifts? i dont understand it at all...
please hellppp!!
Thank uuu!! :) :)
--- End quote ---
Do you owe CIE book of Brian Ratcliff, Helen Eccles, et al ? Page number 394.
red_911:
hey fellas :D
just one question ... if we compare silver chloride n sodium chloride, sodium chloride in almost ionic while silver chloride has covalent character ... explain it terms of ion polarisation the difference between both ? ???
Arthur Bon Zavi:
--- Quote from: red_911 on May 03, 2011, 05:55:21 pm ---hey fellas :D
just one question ... if we compare silver chloride n sodium chloride, sodium chloride in almost ionic while silver chloride has covalent character ... explain it terms of ion polarisation the difference between both ? ???
--- End quote ---
NaCl :
has ionic bonding;
giant ionic structure;
both elements face greater difference in electonegativies, so will bond more strongly thus structure is rigid.
AgCl :
holds polar covalent bonding;
less difference in electronegativities (recall the trend of electrinegativity across and down the periodic table), so will bond less strongly and hence sometimes covalently.
http://en.wikipedia.org/wiki/Ionic_polarization#Ionic_polarization
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