Chapter 9.2, Problem 14PP

Interpretation Introduction

Interpretation:

The chemical equation for the reaction of solid aluminum and sulphur to produce aluminium sulphide needs to be written.

Concept introduction:

The chemical equation is the way of writing chemical reaction with the help of chemical formulas of the reactants and products. To write the chemical equation, we must know the chemical formulas of products and reactants. The chemical equation is the balanced equation.

Answer to Problem 14PP

Chemical equation for the reaction is,

$\text{2Al}\left(s\right)\text{+}3\text{S}\left(s\right)\to {\text{Al}}_2{\text{S}}_{\text{3}}\left(s\right)$

Explanation of Solution

The chemical symbol for aluminium is $\text{Al}$ and sulphur is S. The chemical formula of the product aluminium sulphide is ${\text{Al}}_2{\text{S}}_{\text{3}}$ (Valency of aluminium is 3 and sulphur is 2)

The skeleton equation for the given question is,

$\text{Al}\text{+}\text{S}\to {\text{Al}}_2{\text{S}}_{\text{3}}$

The above is not a balanced chemical equation. Chemical equation follows law of conservation of mass. So, the chemical equation is,

$\text{2Al}\left(s\right)\text{+}3\text{S}\left(s\right)\to {\text{Al}}_2{\text{S}}_{\text{3}}\left(s\right)$