Question

Write balanced equations for the reaction of:
a) Aluminium when heated in air. Write the name of the product.
b) iron with steam. Name the product obtained.
c) calcium with water. Why does calcium start floating in water?

Answer 1

Answer:

1. : Al+O2=Al2O3, aluminum oxide

2. Iron reacts with steam to form hydrogen gas and the oxide Fe3O4.

3. The reaction of calcium with water is less violent. So, the heat released is not sufficient for the hydrogen to catch fire. Calcium starts floating because the bubbles of hydrogen gas which are formed during the reaction stick to the surface of the metal and hence calcium floats on water.

Ca+2H2O→Ca(OH)2+H2↑

Answer 2

(a)alumuniu oxide. bauxite

(b) ferric oxide and hydrogen is the product obtained.

(c)Ca+2H2O gives Ca(OH)2+H2.

Calcium starts floating because the bubbles of hydrogen gas which are formed due to the surface of thee metal.........

hope your helpful .....

my dear friend.