Question

2. Write equations for the reactions of:
(1) iron with steam
(ii) calcium with water
(iii) potassium with water
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Answer 1

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(11,111) oxide and hydrogen.

Fe304 (s)

3Fe(s) + 4H2O(g) steam

+ 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 hydroxide +

Metal + steam

Hydrogen

Calcium reacts with cold water to form

calcium hydroxide and hydrogen gas:

Ca(s)+ 2H2O(1) -----

H2(g)

Ca(OH)2(aq) +

c) potassium with water.

Potassium reacts violently with cold

water to form potassium hydroxide and

hydrogen gas:

2K(s)+ 2H2O(1) --------> 2KOH(aq) + H2(g) +

heat.

In this reaction so much heat is produced

get hydrogen gas formed catches fire

and burns explosively.

HOPE THIS HELPS......