Na (1) + water
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
vigorous
molten ball on surface + fizzing (H2 gas)
alkaline pH12-14
more reactive than Mg – less energy required to remove 1 electron than 2
Mg (2) + water
Mg(s) + 2H2O(l) → Mg(OH)2(aq) + H2(g)
slow
thin Mg hydroxide coating on surface of metal
weakly alkaline pH9-10 – sparingly soluble in water (few OH- produced)
reacts faster with steam:
Mg(s) + H2O(g) → MgO(s) + H2(g)
Oxid Formation: reaction with Structure Melting point Reaction with water
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
vigorous
molten ball on surface + fizzing (H2 gas)
alkaline pH12-14
more reactive than Mg – less energy required to remove 1 electron than 2
Mg (2) + water
Mg(s) + 2H2O(l) → Mg(OH)2(aq) + H2(g)
slow
thin Mg hydroxide coating on surface of metal
weakly alkaline pH9-10 – sparingly soluble in water (few OH- produced)
reacts faster with steam:
Mg(s) + H2O(g) → MgO(s) + H2(g)
Oxid Formation: reaction with Structure Melting point Reaction with water
