Blind Angel
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How to predict a substance properties?
How can we predict substance properties only with is chemical formula?
Anyone has a link where i can find info or just (briefly or not) explain me how
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Microtek
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It's not something that is easily done. Some properties can be predicted by knowing the structure of a compound, for instance whether it's a covalent
of an ionic compound or if it is water soluble or not.
However, predicting the properties of matter is generally something that takes a lot of experience, a lot of knowledge and a little intuition. I don't
know of any shortcuts ( except for expensive software that predicts a very narrow set of properties for a very narrow spectrum of compounds ).
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BlackDragon2712
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http://www.chemaxon.com/marvin/sketch/index.jsp
Here you can predict some of the properties, not all but is still a very useful tool if you ask me.
Now, if you have access to make a FTIR analysis on the other hand...
[Edited on 06/11/2013 by BlackDragon2712]
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AJKOER
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OK, knowing the observed associated properties of 'family' members can give one some expectations that are, at times, good.
For example, taking the family as the halogens, knowing the disproportionation properties of HClO, does give good clues as to the behavior of HBrO and
HIO. The oxides of Chlorine (Cl2O, ClO2,...) gives clues as to possible oxides of Bromine and Iodineand their properties.
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bfesser
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Understanding <a href="http://en.wikipedia.org/wiki/Periodic_trends" target="_blank">periodic trends</a> <img
src="../scipics/_wiki.png" />, and having knowledge of the properties of common ions and <a href="http://en.wikipedia.org/wiki/Functional_group"
target="_blank">functional groups</a> <img src="../scipics/_wiki.png" /> is helpful.
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UnintentionalChaos
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1) Holy necro thread, Batman! 11 years. I think that may be a record.
2) You could rub it into your gums and see what happens.
[Edited on 11-26-13 by UnintentionalChaos]
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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BlackDragon2712
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wait?! the thread is 11 years old? wow for how long this page has existed?!!! sry for not realizing that, but my sciencemadness hour thing just got
messy and I have no idea how to fix it :/ hahahaha
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AJKOER
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OK, it only took 11 years to answer his homework question (must be a record).
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woelen
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This may be an old question, but it is an interesting one. If we have information about the structure and not only a net formula, then more can be
done. Using (fantastically complicated) calculations, using quantum mechanics, it is possible to compute quite a few properties for small atoms and
ions. I can imagine that things like stability, macroscopically observed color in the solid state, solution or gas phase, and maybe even the reactions
with other simple compounds can be computed. Even for very small molecules or ions, however, the computations are huge and a very fast computer is
needed for accurate results.
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blogfast25
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Much can be gleaned from the nature of the chemical bonds that hold a substance together. The mystery of chemical bonding was one of the greatest
riddles of science and one that was ultimately solved by quantum mechanics.
Whether the atoms in a pure substance are bound together by ionic bonds, purely covalent covalent, anything in between or a combination thereof
determines much of the substance's physical and chemical properties.
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