Question

Give equation to express the reaction between :

(a) steam and red hot iron

(b) calcium and water

Answer 1

SOLUTION:
An equation for the reaction of: a) iron with steam

When a metal reacts with steam then the products formed are metal oxide and hydrogen gas.
Metal + steam --------> Metal oxide + Hydrogen

When red hot iron reacts with steam to form iron(II,III) oxide and hydrogen.

3Fe(s) + 4H2O(g) steam -------> Fe3O4 (s) + 4H2(g)


b) calcium with water:
When a metal reacts with water( cold water or hot water) then the products formed are metal hydroxide and hydrogen gas.

Metal + steam --------> Metal hydroxide + Hydrogen

Calcium reacts with cold water to form calcium hydroxide and hydrogen gas:

Ca(s)+ 2H2O(l) --------> Ca(OH)2(aq) + H2(g)

c) potassium with water.

Potassium reacts violently with cold water to form potassium hydroxide and hydrogen gas:

2K(s)+ 2H2O(l) --------> 2KOH(aq) + H2(g) + heat.
In this reaction so much heat is produced get hydrogen gas formed catches fire and burns explosively

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