Redox 1 Flashcards
1
Q
oxidation number
A
the number of electrons which it has lost or gained as a result of forming a compound
2
Q
oxidation number rules
A
uncombined element or compound=0
hydrogen in metal hydride= -1
oxygen in peroxides= -1
3
Q
oxidation
A
lose of electrons
ox no. gets more positive
4
Q
reduction
A
gain of electrons
ox no. gets more negative
5
Q
oxidising agent
A
causes another material to become oxidised, gain electrons
6
Q
reducing agent
A
causes another material to become reduced, lose electrons
7
Q
disproportionation
A
an element in a single species being simultaneously oxidised and reduced
8
Q
half equation for electron gain
A
Cu2+(aq) + 2e- → Cu(s)
9
Q
half equation for electron loss
A
Mg(s) → Mg2+(aq) + 2e-
10
Q
metals generally form +ve or -ve
A
positive ions
11
Q
non-metals generally from +ve or -ve
A
negative ions
