Metals Reacting with Water

Magnesium (Mg): Reacts slowly with cold water, faster with steam. Produces hydrogen gas.

Mg + 2H₂O → Mg(OH)₂ + H₂

Aluminum (Al): Protected by oxide layer. Reacts with steam only.

2Al + 3H₂O → Al₂O₃ + 3H₂

Zinc (Zn): Reacts with steam only. Produces hydrogen gas.

Zn + H₂O → ZnO + H₂

Copper (Cu): Does not react with water or steam.

Reactivity Order:
Mg (cold water) > Al (steam) > Zn (steam) > Cu (no reaction)