Electrolysis Flashcards
1
Q
Oxidation
A
Loss of electrons
2
Q
Reduction
A
Gain of electrons
3
Q
Positive ions
A
Cations
4
Q
Negative ions
A
Anions
5
Q
Electrolysis in aqueous solutions (general)
A
The H+ and OH- are present from water.
6
Q
Electrolysis in aqueous solutions at the CATHODE
A
H+ and metal ions are present and Hydrogen gas will be produced IF the metal is more reactive than hydrogen.
If the metal is less reactive, then a solid layer of pure metal is produced.
7
Q
Electrolysis of aqueous solutions at the ANODE
A
If OH- and halide ions (Cl-, I-, Br-) are present then chlorine, iodine or bromine is formed.
If no Halide is present then oxygen will be produced.
8
Q
Positively charged electrode
A
ANODE
9
Q
Negatively charged electrode
A
CATHODE
