Ions attracted to the cathode: Only positive ions ( metal ions )
Ions attracted to the anode: Only negative ions ( non- metal ions )
Cathode: Metal
Anode: Non-metal
Aqueous
Ions attracted to the cathode: Only positive ions
( non-reactive metal ions and hydrogen ions )
Ions attracted to the anode: Only negative ions
( non-reactive metal ions and hydroxide ions
Cathode: Non-reactive metal or Hydrogen gas
Anode: Halogen ( for concentrated )or oxygen ( for dilute cases )
Aqueous ( concentrated / dilute )
Concentrated :
Cathode: non-reactive metal or hydrogen gas
Anode: halogen or oxygen gas.
Dilute
Cathode: non-reactive metal or hydrogen gas
Anode: oxygen gas
If the electrode is reactive, it often dissolves in electrolyte.
Electric Cell ( Simple Cell)
• The further apart the metals are in the reactivity series, the greater the voltage.
• The more reactive metal is placed at cathode. Eg: Zinc at cathode; Copper at anode.
• Any salt solution can be used at electrolyte.
