Oxidation States Flashcards
what is the oxidation state for a pure element
0
what is the OS for monoatomic ions
the charge
what is the oxidation state of Flourine
-I (always)
what is the oxidation state of Oxygen
-II (nearly always) except from with fluorine - its +II)
what is the oxidation state of Hydrogen
+I (except when combined with metals or Bromine)
what is the oxidation state of Hyrdogen when combined with metals or Bromine?
-I
what is the oxidation state of chlorine
-I (except when combined with O and/or Flourine)
what is the oxidation state of group 1 metals
+I (always)
what is the oxidation state of group 2 metals
+II (always)
each bond with a higher electronegativity increases oxidation state by …
1
each bond with a lower electronegativity increases oxidation state by …
1
multiple bonds are counted as …
separate bonds. ie. double bond changes the OS by 2 …
bonds between ___ or ____ do not affect the OS
atoms or the same element or lone pairs
what is a disproportionation reaction?
where at one element undergoes both oxidation and reduction to form 2 versions of that element with different oxidation states
what is a comproportionation reaction?
where 2 of the same element undergo oxidation and reduction to form 1 of that element with a common oxidation state.
