Carolina Eco Battery Vehicles - Manual (Page 3)

7
Your metal–air cells | ECO-BATTERY VEHICLES
Salzwasser
Magnesiumhydroxid
Sauerstoff
(Kathode)
Sauerstoff
(Kathode)
Magnesium
(Anode)
e-
Salt Water
Salt Water
Magnesium (Anode)
Magnesium (Anode)
Magnesium Hydroxide
Magnesium Hydroxide
Oxygen (Cathode)
Oxygen (Cathode)
Oxygen (Cathode)
THE CHEMICAL ELEMENTS
Here’s an overview to help you understand
what’s happening inside your metal–air cell.
O = oxygen
H = hydrogen
H
2
O = water
Mg = magnesium
Mg(OH)
2
= magnesium hydroxide
These are the reactions taking place in your metal–air cell.
Main reaction, which releases energy:
Reaction at the anode:
Mg - 2e¯ + 2H2O —> Mg(OH)2 + 2H +
Reaction at the cathode:
½ O2 + H2O + 2e¯ —> 2OH¯
Overall reaction:
Mg + 2H2O —> Mg(OH)2 + H2