Redox Flashcards
1
Q
What is the oxidation number
A
the oxidation state of an element or ionic substance
2
Q
o.n of neutral compound
A
adds up to zero
3
Q
o.n of element
A
0
4
Q
o.n in charged
A
adds to charge
5
Q
o.n hydrogen
A
+1
6
Q
o.n of oxygen
A
-2
7
Q
o.n halogen
A
-1
8
Q
o.n group 1
A
+1
9
Q
o.n of group 2
A
+2
10
Q
o.n of oxygen in peroxide
A
-1
11
Q
o.n of hydrogen in metal hydrides
A
-1
12
Q
s block
A
lose electrons, so oxidised and + oxidation number
13
Q
p block
A
gain electrons so reduced and have negative oxidation number
14
Q
what is oxidation agent
A
accepts electrons therefore gains electrons and is reduced
15
Q
what is reducing agent
A
donate electrons, loses electrons and is oxidised
16
Q
what is a disproportionation reaction
A
when the species is both reduced and oxidised. So increase and decrease in oxidation number
