Redox
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What is oxidation?
Loss of electrons
What is reduction?
Gain of electrons
What happens to oxidation number when oxidation occurs?
Increases
What happens to oxidation number when reduction occurs?
Decreases
What is the oxidation number for uncombined elements?
0
What does the oxidation number of elements add up to in a compound?
0
What is the oxidation number of a monoatomic ion equal to?
Ionic charge
What is the oxidation number of a polyatomic ion equal to?
The charge of the ion
What is the oxidation of group 1 metals?
+1
What is the oxidation number of group 2 metals?
+2
What is the oxidation number of Aluminium?
+3
What is the oxidation number of Hydrogen?
+1
Which case is hydrogen not +1?
In NaH where it is -1.
Oxidation number of F?
-1
Oxidation number of Cl, I and Br?
-1
When does the oxidation number of Cl, I and Br vary?
In compounds with Oxygen and fluorine.
Oxidation number of O?
-2
When does the oxidation number of O vary?
In peroxides where it is -1.
What are reducing agents?
Electron donors
What are oxidising agents?
Electron acceptors
What does an oxidising agent do?
Causes another element to oxidise. It itself is reduced.
What does an reducing agent do?
Causes another element to reduce. It itself is oxidised.