The following questions are relevant to the extraction of aluminium:
Give a balanced chemical equation for the above reaction.

Open in App

Solution

The bauxite ore is heated with caustic soda at a temperature of $150 {}^{\circ}C$ and forms sodium aluminate.
$A l_{2} O_{3} \cdot 2 H_{2} O + N a O H \overset{150 {}^{\circ}C}{\to} N a A l O_{2} + H_{2} O$
$BauxiteCausticSodiumWater$
$SodaAluminate$
$A l_{2} O_{3} \cdot 2 H_{2} O + N a O H \overset{150 {}^{\circ}C}{\to} N a A l O_{2} + H_{2} O$ Number of atoms in reactant:
aluminium = $2$
oxygen = $6$
hydrogen = $4$
sodium = $1$
Number of atoms in product:
aluminium = $1$
oxygen = $3$
hydrogen = $2$
sodium = $1$
To balance the species, we will multiply $N a O H$ molecule by $2$ and $N a A l O_{2}$ by $2$ .
Therefore, the equation becomes: $A l_{2} O_{3} \cdot 2 H_{2} O + 2 N a O H \overset{150 {}^{\circ}C}{\to} 2 N a A l O_{2} + H_{2} O$
The equation obtained after balancing all the species according to the law of conservation of mass is:
$A l_{2} O_{3} \cdot 2 H_{2} O + 2 N a O H \overset{150 {}^{\circ}C}{\to} 2 N a A l O_{2} + H_{2} O$

Suggest Corrections

Similar questions

Question 20.1

Write the balanced chemical equation for the following reaction and identify the type of reaction.

Thermit reaction: Iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.

$B a r i u m C h l o r i d e + A l u m i n i u m S u l p h a t e \to B a r i u m S u l p h a t e + A l u m i n i u m C h l o r i d e$

Which of the following options correctly represents the balanced chemical equation for the above reaction?

$B a r i u m C h l o r i d e + A l u m i n i u m S u l p h a t e \to B a r i u m S u l p h a t e + A l u m i n i u m C h l o r i d e$

Which of the following options correctly represents the balanced chemical equation for the above reaction?

Join BYJU'S Learning Program