Question

Write a chemical equation in symbols and formulae for the following word equation.

$\mathrm{Iron}+\mathrm{Sulphur}\to \mathrm{Iron}\left(\mathrm{II}\right)\mathrm{sulphide}$

Answer 1

Skeletal equations -

A skeleton chemical equation represents a chemical reaction by employing chemical equations for reactants and products. The mass number of elements on the reactant side is not equal to the mass number of elements on the product side in the skeleton chemical equation.

Converting the word equation into the skeletal equation -

• The chemical symbol of the given reactants are Iron $-\mathrm{Fe}$ and Sulphur $-{\mathrm{S}}_2$ and the product Iron(II) sulfide $-\mathrm{FeS}$
• Therefore, the skeletal equation will be represented by -A

$\mathrm{Fe}+{\mathrm{S}}_2\to \mathrm{FeS}$

• The balanced chemical equation for the above reaction will be $\underset{\mathrm{Iron}}{2\mathrm{Fe}}+\underset{\mathrm{Sulfur}}{{\mathrm{S}}_2}\to \underset{\mathrm{Iron}\left(\mathrm{II}\right)\mathrm{sulfide}}{2\mathrm{FeS}}$