Question

Why is the product formed on heating a mixture of 7g of iron and 4g of sulphur called a compound give two reasons. .....

Answer 1

The balanced equation for the above equation is

Fe + S ------------> FeS

Now, the Ferrous sulphide(FeS) formed is called as a compound because;

→ A compound by definition is the one that is formed when 2 or more elements come and chemically bond with each other.

In the above case, Fe and S bond together by an ionic bond, so as to form FeS, which constitutes Fe²⁺ and S²⁻.

→ Another reason why FeS, is called a compound is that Both the element combine in a definite proportion in order to form Ferrous sulphide (FeS).

Hope it helps!!

Answer 2

Iron and sulfur reaction

Demonstration and class practical

This demonstration or class experiment shows the exothermic reaction of two elements, iron and sulfur, to form the compound, iron sulfide. The two solids are mixed and heated in a test-tube (or ignition tube). The reaction can be used to illustrate elements, mixtures and compounds.

Lesson organisation

This reaction can be carried out as a demonstration or class experiment in a well-ventilated laboratory provided that the instructions provided here are strictly adhered to.

The reaction can be carried out in borosilicate glass test-tubes as a demonstration or in smaller (ignition) tubes by students. The reaction provides an opportunity to show that the properties of a compound are different from its constituent elements.

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