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30 terms

LC Chem 1.5 Oxidation and Reduction

chemistry
STUDY
PLAY
Addition of oxygen
Oxidation in terms of movement of oxygen
Removal of oxygen
Reduction in terms of movement of oxygen
Addition of hydrogen
Reduction in terms of movement of hydrogen
Loss of electrons
Oxidation in terms of electron transfer
Gain of electrons
Reduction in terms of electron transfer
Oxidising agent
A that brings about oxidation in other substances
Reduced
What happens to the oxidising agent
Reducing agent
A substance that brings about reduction in other substances
Oxidised
What happens to the reducing agent
Halogens
Group of elements which are good oxidising agents - they oxidise chemicals in the cells of germs which kills them
Hydrogen peroxide
Oxidising agent used to bleach hair
Carbon monoxide
Reducing agent (gas) used to remove the oxygen from iron ore in order to convert it to pure iron
Oxidation number
The charge that an atom has or appears to have when electrons are distributed according to certain rules
0
The oxidation number of any uncombined element
(Adds to) 0
The sum of the oxidation numbers of all the elements in a compound
Same as its charge
The oxidation number of an ion of an element
(Adds to) the charge
The sum of the oxidation numbers of all the elements in a complex ion
-2
Oxidation number of Oxygen normally
-1
Oxidation number of Oxygen peroxides
+2
Oxidation number of Oxygen in the compound OF2
+1
Oxidation number of Hydrogen normally
-1
Oxidation number of Hydrogen in the metal hydrides
-1
Oxidation number of Halogens normally
+1
Oxidation number of Halogens when bonded to a more electronegative atom
Increase
Oxidation in terms of oxidation number
Decrease
Reduction in terms of oxidation number
Displace (takes electrons from)
What a halogen does to solutions of salts of less electronegative halogens
Oxidises sulfite to sulfate
What chlorine does to a sodium sulfite solution
Oxidises Fe2+ to Fe3+
What chlorine does to an iron(II) sulfate solution
Displaces Cu2+ ions as copper metal
What happens when a piece of zinc metal or magnesium metal is dipped into copper sulfate solution