Illustrate the presence of several oxidation states for vanadium
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05.03.2018
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Bu səhifədəki naviqasiya:
What are “oxidation states”
Atoms of monatomic ions have charge of ion
Example
A change in oxidation state can bring about a change in colour
Compounds with metals in a high
Summary of results
Illustrate the presence of several
oxidation states for vanadium
Illustrate the presence of several oxidation states for vanadium
Show how it is possible to change from one oxidation state to another
What are “oxidation states”?
The actual charge of an atom
if the atom is a monatomic ion
, or the hypothetical charge assigned to an atom by certain rules
Rules
Elements are 0
Atoms of monatomic ions have charge of ion
O is -2
in most compounds
H is +1 in most compounds
F is -1 in all compounds
Sum of numbers in a compound is 0; in a polyatomic
ion is charge of ion
Example
Oxidation number of Cl in:
HClO4 (perchloric acid)
ClO3- (chlorate ion)
The significance of transition metals
Transition metals exhibit variable oxidation states of differing stability
A change in oxidation state can
bring about a change in colour
Oxidation and reduction
Oxidation
can be considered as an
increase
in oxidation number
Reduction
can be considered as a
decrease
in oxidation number
Compounds with metals in a
high
oxidation state tend to be
oxidising agents
whereas
compounds with metals in a
low
oxidation state are often
reducing
agents
Oxidation states of vanadium
Summary
of results
Summary of results
Summary of results
Summary of results
Summary of results
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