NounPlural oxidation states oxidation state (plural oxidation states)
From Wiktionary under the GNU Free Documentation License. In chemistry, the oxidation state is an indicator of the degree of oxidation of an atom in a chemical compound. The formal oxidation state is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. Oxidation states are typically represented by integers, which can be positive, negative, or zero. In some cases the average oxidation state of an element is a fraction, such as 8/3 for iron in magnetite (Fe3O4). The highest oxidation state is +8 in the tetroxides of xenon, ruthenium and osmium, while the lowest is −4 for some elements in the carbon group. The increase in oxidation state of an atom through a chemical reaction is known as an oxidation; a decrease in oxidation state is known as a reduction. Such reactions involve the formal transfer of electrons, a net gain in electrons being a reduction and a net loss of electrons being an oxidation. For pure elements, the oxidation state is zero. Here is the definition of the oxidation state listed by IUPAC: “ Oxidation state: A measure of the degree of oxidation of an atom in a substance. It is defined as the charge an atom might be imagined to have when electrons are counted according to an agreed-upon set of rules: (1) the oxidation state of a free element (uncombined element) is zero; (2) for a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion; (3) hydrogen has an oxidation state of 1 and oxygen has an oxidation state of -2 when they are present in most compounds. (Exceptions to this are that hydrogen has an oxidation state of -1 in hydrides of active metals, e.g. LiH, and oxygen has an oxidation state of -1 in peroxides, e.g. H2O2; (4) the algebraic sum of oxidation states of all atoms in a neutral molecule must be zero, while in ions the algebraic sum of the oxidation states of the constituent atoms must be equal to the charge on the ion. For example, the oxidation states of sulfur in H2S, S8(elementary sulfur), SO2, SO3, and H2SO4 are, respectively: -2, 0, +4, +6 and +6. The higher the oxidation state of a given atom, the greater is its degree of oxidation; the lower the oxidation state, the greater is its degree of reduction. ”From Wikipedia under the
GNU Free Documentation License  scienceforums.net YT2095 hu, 12 Jun 2008 11:54:02 GM It oxidises very quickly in air to a godforsaken mixture of Fe(II) and Fe(III) carbonates/ oxides. I think that you are getting some mixed . oxidation state. oxide but I doubt it's close to the stoichiometry for magnetite. ... scienceforums.net popcorn Fri, 03 Oct 2008 12:06:45 GM the 2nd ways is by looking at the structure of the molecule.if the bond is ionic the more electronegetive gets a full -1 charge added to its . oxidation state. ,if between the 2 atoms participating in the bond one is more electropositive it ...  nutraingredients.com Fri, 16 Jul 2010 09:00:00 GM The AFSSA findings relate to approved lutein-AMD health claims in France that remain valid and . state. : Lutein helps protect the retina and the lens from . oxidation. ; Lutein is one (of the) constituent(s) of the retina and the lens ... From Google Blog Search: "oxidation state"  news.google.com Black Voice News Included in Elderman's book are essays on Preservation by Knox Mellon, California State Preservation Officer, Emeritus; a brief history of the uses of the ... news.google.com spectroscopyNOW.com This leads to the oxidation of natural, but insoluble, arsenic salts in the rock, which then dissolve in the water when the rains return, filling wells and ... and more » news.google.com The Engineer The new facility will be the first to use nitrous oxide for industrialscale oxidation . This greenhouse gas, which is a by-product from another production ... From Google News Search: "oxidation state" What is the oxidation state and d electron count for the metal ion in the following? Q. What is the oxidation state and d electron count (number of d electrons) for the metal ion in the following coordination complex ? [Cr(H2O)6]I3 Asked by Kamiru - Fri Apr 24 01:27:04 2009 - - 1 Answers - 1 Comments A. well the metal ion here is Cr3+ sooo the number of d electrons is 1 Answered by anoman5000 - Fri Apr 24 01:33:07 2009 Give the oxidation state of the transition metal followed by the n? Q. For the coordination compound Na3[Co(NO2)6] give the oxidation state of the transition metal followed by the number of ligands in the compound. Explanation if possible please. Thanks. Asked by Paul C - Sat Apr 25 18:46:03 2009 - - 1 Answers - 0 Comments A. NO21- is the ligand, six of which are coordinated to the cobalt ion (coordination number = 6). Since 3 Na is +3, the [Co(NO2)6] must be -3. This makes the Co +3. Answered by Chem Man - Sat Apr 25 18:52:23 2009 Assign the oxidation state for nitrogen in each of the following?
Q. Assign the oxidation state for nitrogen in each of the following. (Type your answer using the format +1 and -2.) (a) Li3N ___ (b) NH3 ___ (c) N2H4 ___ (d) NO ___ (e) N2O ___ (f) NO2 ___ (g) NO2- ___ (h) NO3- ___ (i) N2 ___ Asked by chemgal - Wed Mar 4 10:10:27 2009 - - 1 Answers - 0 Comments A. a) -3 b) -3 c) -2 d) +2 e) +1 f) +4 g) +3 h) +5 i) 0 Answered by Thorntas - Wed Mar 4 10:29:52 2009 From Yahoo Answer Search: "oxidation state" |
