Question

Give balanced equation for the action of heat on :

Aluminum hydroxide

Answer 1

When Aluminium hydroxide is heated we get Aluminium oxide and water.

The equation can be written as-

$\mathrm{Al}{\left(\mathrm{OH}\right)}_3⟶\mathrm{Al}2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{O}$

Balancing equation-

We can see here we have got an unequal number of atoms on the reactant and product parts.

Atoms	Reactant	Product
Al	1	1
O	3	4
H	3	2

• We multiply the Aluminium hydroxide molecule by 2.
• We get extra hydrogen and oxygen on the product side, to balance this we multiply the water molecule by 3.

Atoms	Reactant	Product
Al	2	2
O	6	6
H	6	6

Hence, the complete balanced equation is-

$\underset{\mathrm{Aluminium}\mathrm{hydroxide}}{2\mathrm{Al}{\left(\mathrm{OH}\right)}_3\left(\mathrm{s}\right)}⟶\underset{\mathrm{Aluminium}\mathrm{oxide}}{{\mathrm{Al}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{3{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$